./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:10:55,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:10:55,766 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:10:55,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:10:55,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:10:55,801 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:10:55,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:10:55,802 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:10:55,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:10:55,803 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:10:55,804 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:10:55,804 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:10:55,805 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:10:55,805 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:10:55,806 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:10:55,806 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:10:55,807 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:10:55,808 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:10:55,808 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:10:55,809 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:10:55,809 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:10:55,810 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:10:55,811 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:10:55,811 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:10:55,812 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:10:55,812 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:10:55,813 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:10:55,813 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:10:55,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:10:55,814 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:10:55,814 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:10:55,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:10:55,815 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:10:55,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:10:55,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:55,817 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:10:55,817 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:10:55,818 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:10:55,818 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:10:55,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:10:55,819 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:10:55,820 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:10:55,820 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:10:55,820 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:10:55,821 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_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad [2023-11-23 21:10:56,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:10:56,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:10:56,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:10:56,202 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:10:56,203 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:10:56,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-11-23 21:10:59,368 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:10:59,904 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:10:59,905 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-11-23 21:10:59,955 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/data/040774c10/8fec8ef53e8f4b6982a4b9304ae28940/FLAGa621f5102 [2023-11-23 21:10:59,976 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/data/040774c10/8fec8ef53e8f4b6982a4b9304ae28940 [2023-11-23 21:10:59,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:10:59,984 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:10:59,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:59,987 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:10:59,993 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:10:59,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:59" (1/1) ... [2023-11-23 21:10:59,997 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f37c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:59, skipping insertion in model container [2023-11-23 21:10:59,997 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:59" (1/1) ... [2023-11-23 21:11:00,133 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:11:01,499 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_ddb12288-c116-47cf-874f-5ff8efa410d5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2023-11-23 21:11:01,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:01,574 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:11:01,726 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [4160] [2023-11-23 21:11:01,729 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [4167] [2023-11-23 21:11:01,731 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bsrq %1,%q0": "+r" (bitpos): "rm" (x)); [4182] [2023-11-23 21:11:02,064 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_ddb12288-c116-47cf-874f-5ff8efa410d5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2023-11-23 21:11:02,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:02,159 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:02,167 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:11:02,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02 WrapperNode [2023-11-23 21:11:02,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:02,170 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:02,170 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:11:02,170 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:11:02,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,369 INFO L138 Inliner]: procedures = 151, calls = 834, calls flagged for inlining = 67, calls inlined = 53, statements flattened = 1829 [2023-11-23 21:11:02,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:02,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:11:02,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:11:02,371 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:11:02,382 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,395 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,396 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,459 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,470 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,493 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,516 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:11:02,518 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:11:02,518 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:11:02,518 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:11:02,519 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (1/1) ... [2023-11-23 21:11:02,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:02,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:02,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:11:02,648 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_lock_sync [2023-11-23 21:11:02,648 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_lock_sync [2023-11-23 21:11:02,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:11:02,651 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_free [2023-11-23 21:11:02,652 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_free [2023-11-23 21:11:02,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:11:02,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:11:02,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:11:02,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:11:02,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:11:02,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:11:02,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:11:02,653 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:11:02,653 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_release_lockspace [2023-11-23 21:11:02,653 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_release_lockspace [2023-11-23 21:11:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure lock_comm [2023-11-23 21:11:02,654 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_comm [2023-11-23 21:11:02,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:11:02,655 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:11:02,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:11:02,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:11:02,656 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-23 21:11:02,657 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-23 21:11:02,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2023-11-23 21:11:02,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2023-11-23 21:11:02,658 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:11:02,658 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:11:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-11-23 21:11:02,659 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-11-23 21:11:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:11:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:11:02,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:11:02,660 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-23 21:11:02,661 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-23 21:11:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2023-11-23 21:11:02,662 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2023-11-23 21:11:02,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:11:02,662 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:11:02,662 INFO L130 BoogieDeclarations]: Found specification of procedure bitmap_copy_from_slot [2023-11-23 21:11:02,662 INFO L138 BoogieDeclarations]: Found implementation of procedure bitmap_copy_from_slot [2023-11-23 21:11:02,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:11:02,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:11:02,663 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:11:02,663 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:11:02,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:11:02,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 21:11:02,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 21:11:02,664 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-11-23 21:11:02,664 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-11-23 21:11:02,664 INFO L130 BoogieDeclarations]: Found specification of procedure md_register_thread [2023-11-23 21:11:02,664 INFO L138 BoogieDeclarations]: Found implementation of procedure md_register_thread [2023-11-23 21:11:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:11:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure md_unregister_thread [2023-11-23 21:11:02,665 INFO L138 BoogieDeclarations]: Found implementation of procedure md_unregister_thread [2023-11-23 21:11:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-11-23 21:11:02,665 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-11-23 21:11:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:11:02,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:11:02,666 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-23 21:11:02,667 INFO L130 BoogieDeclarations]: Found specification of procedure resync_send [2023-11-23 21:11:02,668 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_send [2023-11-23 21:11:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-23 21:11:02,669 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-23 21:11:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_init [2023-11-23 21:11:02,669 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_init [2023-11-23 21:11:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:11:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_comm [2023-11-23 21:11:02,670 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_comm [2023-11-23 21:11:02,670 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-23 21:11:02,670 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-23 21:11:02,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:11:02,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:11:02,671 INFO L130 BoogieDeclarations]: Found specification of procedure resync_info_update [2023-11-23 21:11:02,671 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_info_update [2023-11-23 21:11:02,671 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:11:02,671 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:11:02,672 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:11:02,672 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:11:02,672 INFO L130 BoogieDeclarations]: Found specification of procedure __sendmsg [2023-11-23 21:11:02,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __sendmsg [2023-11-23 21:11:02,672 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-23 21:11:02,672 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-23 21:11:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:11:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure pretty_uuid [2023-11-23 21:11:02,674 INFO L138 BoogieDeclarations]: Found implementation of procedure pretty_uuid [2023-11-23 21:11:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:11:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:11:02,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:11:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure sendmsg [2023-11-23 21:11:02,675 INFO L138 BoogieDeclarations]: Found implementation of procedure sendmsg [2023-11-23 21:11:02,675 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_unlock_sync [2023-11-23 21:11:02,675 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_unlock_sync [2023-11-23 21:11:03,221 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:11:03,224 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:11:03,416 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:11:04,978 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:11:05,365 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:11:05,365 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:11:05,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:05 BoogieIcfgContainer [2023-11-23 21:11:05,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:11:05,370 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:11:05,370 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:11:05,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:11:05,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:10:59" (1/3) ... [2023-11-23 21:11:05,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d595df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:05, skipping insertion in model container [2023-11-23 21:11:05,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:02" (2/3) ... [2023-11-23 21:11:05,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d595df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:05, skipping insertion in model container [2023-11-23 21:11:05,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:05" (3/3) ... [2023-11-23 21:11:05,377 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-11-23 21:11:05,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:11:05,396 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:11:05,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:11:05,469 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;@29590e84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:11:05,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:11:05,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 525 states, 331 states have (on average 1.3413897280966767) internal successors, (444), 342 states have internal predecessors, (444), 156 states have call successors, (156), 37 states have call predecessors, (156), 36 states have return successors, (152), 151 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-23 21:11:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 21:11:05,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:05,494 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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] [2023-11-23 21:11:05,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:05,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:05,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1859792704, now seen corresponding path program 1 times [2023-11-23 21:11:05,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:05,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359559135] [2023-11-23 21:11:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:05,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-11-23 21:11:06,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359559135] [2023-11-23 21:11:06,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359559135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:06,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:06,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:11:06,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163352799] [2023-11-23 21:11:06,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:06,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:06,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:06,539 INFO L87 Difference]: Start difference. First operand has 525 states, 331 states have (on average 1.3413897280966767) internal successors, (444), 342 states have internal predecessors, (444), 156 states have call successors, (156), 37 states have call predecessors, (156), 36 states have return successors, (152), 151 states have call predecessors, (152), 152 states have call successors, (152) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:11:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:07,684 INFO L93 Difference]: Finished difference Result 1483 states and 2133 transitions. [2023-11-23 21:11:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:07,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 146 [2023-11-23 21:11:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:07,721 INFO L225 Difference]: With dead ends: 1483 [2023-11-23 21:11:07,723 INFO L226 Difference]: Without dead ends: 979 [2023-11-23 21:11:07,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:07,745 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 670 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:07,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1346 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:11:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-11-23 21:11:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 976. [2023-11-23 21:11:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 628 states have (on average 1.3343949044585988) internal successors, (838), 637 states have internal predecessors, (838), 280 states have call successors, (280), 68 states have call predecessors, (280), 67 states have return successors, (278), 276 states have call predecessors, (278), 278 states have call successors, (278) [2023-11-23 21:11:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1396 transitions. [2023-11-23 21:11:07,934 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1396 transitions. Word has length 146 [2023-11-23 21:11:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:07,943 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1396 transitions. [2023-11-23 21:11:07,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:11:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1396 transitions. [2023-11-23 21:11:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-23 21:11:07,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:07,955 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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] [2023-11-23 21:11:07,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:11:07,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:07,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:07,957 INFO L85 PathProgramCache]: Analyzing trace with hash 285702109, now seen corresponding path program 1 times [2023-11-23 21:11:07,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:07,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774398505] [2023-11-23 21:11:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:07,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-23 21:11:08,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:08,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774398505] [2023-11-23 21:11:08,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774398505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:08,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:08,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:11:08,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453959978] [2023-11-23 21:11:08,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:08,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:08,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:08,339 INFO L87 Difference]: Start difference. First operand 976 states and 1396 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:11:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:08,826 INFO L93 Difference]: Finished difference Result 1584 states and 2240 transitions. [2023-11-23 21:11:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:08,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 157 [2023-11-23 21:11:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:08,845 INFO L225 Difference]: With dead ends: 1584 [2023-11-23 21:11:08,846 INFO L226 Difference]: Without dead ends: 1579 [2023-11-23 21:11:08,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:08,855 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 438 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:08,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1321 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:11:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2023-11-23 21:11:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2023-11-23 21:11:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1024 states have (on average 1.3408203125) internal successors, (1373), 1035 states have internal predecessors, (1373), 431 states have call successors, (431), 124 states have call predecessors, (431), 123 states have return successors, (429), 427 states have call predecessors, (429), 429 states have call successors, (429) [2023-11-23 21:11:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2233 transitions. [2023-11-23 21:11:09,059 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2233 transitions. Word has length 157 [2023-11-23 21:11:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:09,062 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 2233 transitions. [2023-11-23 21:11:09,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:11:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2233 transitions. [2023-11-23 21:11:09,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-23 21:11:09,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:09,069 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:09,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:11:09,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:09,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1957588221, now seen corresponding path program 1 times [2023-11-23 21:11:09,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:09,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807143276] [2023-11-23 21:11:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-23 21:11:09,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807143276] [2023-11-23 21:11:09,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807143276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:09,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:09,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:11:09,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899694944] [2023-11-23 21:11:09,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:09,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:09,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:09,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:09,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:09,387 INFO L87 Difference]: Start difference. First operand 1579 states and 2233 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:11:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:10,089 INFO L93 Difference]: Finished difference Result 3397 states and 4768 transitions. [2023-11-23 21:11:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:10,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 173 [2023-11-23 21:11:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:10,106 INFO L225 Difference]: With dead ends: 3397 [2023-11-23 21:11:10,136 INFO L226 Difference]: Without dead ends: 1851 [2023-11-23 21:11:10,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:10,144 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 146 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:10,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1270 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:11:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2023-11-23 21:11:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1844. [2023-11-23 21:11:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1214 states have (on average 1.3410214168039538) internal successors, (1628), 1227 states have internal predecessors, (1628), 473 states have call successors, (473), 157 states have call predecessors, (473), 156 states have return successors, (471), 467 states have call predecessors, (471), 471 states have call successors, (471) [2023-11-23 21:11:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2572 transitions. [2023-11-23 21:11:10,295 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2572 transitions. Word has length 173 [2023-11-23 21:11:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:10,296 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2572 transitions. [2023-11-23 21:11:10,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:11:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2572 transitions. [2023-11-23 21:11:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-23 21:11:10,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:10,303 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:11:10,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:10,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash 960304375, now seen corresponding path program 1 times [2023-11-23 21:11:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144013403] [2023-11-23 21:11:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-23 21:11:12,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144013403] [2023-11-23 21:11:12,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144013403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677344101] [2023-11-23 21:11:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:12,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:12,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:12,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:12,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:11:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:12,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 21:11:12,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-23 21:11:13,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:11:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2023-11-23 21:11:14,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677344101] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:14,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:11:14,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4] total 9 [2023-11-23 21:11:14,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373837394] [2023-11-23 21:11:14,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:14,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:11:14,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:14,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:11:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:11:14,337 INFO L87 Difference]: Start difference. First operand 1844 states and 2572 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 21:11:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:16,032 INFO L93 Difference]: Finished difference Result 2591 states and 3595 transitions. [2023-11-23 21:11:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:11:16,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 215 [2023-11-23 21:11:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:16,057 INFO L225 Difference]: With dead ends: 2591 [2023-11-23 21:11:16,057 INFO L226 Difference]: Without dead ends: 2586 [2023-11-23 21:11:16,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:11:16,063 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 698 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:16,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 2188 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 21:11:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2023-11-23 21:11:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2582. [2023-11-23 21:11:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2582 states, 1708 states have (on average 1.3430913348946136) internal successors, (2294), 1724 states have internal predecessors, (2294), 645 states have call successors, (645), 229 states have call predecessors, (645), 228 states have return successors, (643), 638 states have call predecessors, (643), 643 states have call successors, (643) [2023-11-23 21:11:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3582 transitions. [2023-11-23 21:11:16,265 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3582 transitions. Word has length 215 [2023-11-23 21:11:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:16,266 INFO L495 AbstractCegarLoop]: Abstraction has 2582 states and 3582 transitions. [2023-11-23 21:11:16,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 21:11:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3582 transitions. [2023-11-23 21:11:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-23 21:11:16,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:16,274 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:16,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:16,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:16,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:16,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:16,489 INFO L85 PathProgramCache]: Analyzing trace with hash 824368328, now seen corresponding path program 1 times [2023-11-23 21:11:16,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:16,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362331855] [2023-11-23 21:11:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-11-23 21:11:17,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:17,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362331855] [2023-11-23 21:11:17,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362331855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:17,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909601967] [2023-11-23 21:11:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:17,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:17,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:17,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:17,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:11:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:18,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:11:18,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-23 21:11:18,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:18,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909601967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:18,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:18,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-11-23 21:11:18,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463069812] [2023-11-23 21:11:18,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:11:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:11:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:18,692 INFO L87 Difference]: Start difference. First operand 2582 states and 3582 transitions. Second operand has 6 states, 4 states have (on average 19.75) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-23 21:11:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:21,136 INFO L93 Difference]: Finished difference Result 5172 states and 7197 transitions. [2023-11-23 21:11:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:11:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 19.75) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 226 [2023-11-23 21:11:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:21,164 INFO L225 Difference]: With dead ends: 5172 [2023-11-23 21:11:21,164 INFO L226 Difference]: Without dead ends: 2589 [2023-11-23 21:11:21,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:11:21,180 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 3 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:21,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3254 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 21:11:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2023-11-23 21:11:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2589. [2023-11-23 21:11:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 1715 states have (on average 1.3416909620991253) internal successors, (2301), 1731 states have internal predecessors, (2301), 645 states have call successors, (645), 229 states have call predecessors, (645), 228 states have return successors, (643), 638 states have call predecessors, (643), 643 states have call successors, (643) [2023-11-23 21:11:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3589 transitions. [2023-11-23 21:11:21,410 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3589 transitions. Word has length 226 [2023-11-23 21:11:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:21,411 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3589 transitions. [2023-11-23 21:11:21,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 19.75) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-23 21:11:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3589 transitions. [2023-11-23 21:11:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-11-23 21:11:21,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:21,419 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:21,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:21,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:21,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:21,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:21,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1601959414, now seen corresponding path program 1 times [2023-11-23 21:11:21,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:21,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257461054] [2023-11-23 21:11:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:21,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-11-23 21:11:23,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:23,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257461054] [2023-11-23 21:11:23,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257461054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:23,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143997647] [2023-11-23 21:11:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:23,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:23,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:23,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:23,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb12288-c116-47cf-874f-5ff8efa410d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:11:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:24,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 21:11:24,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-11-23 21:11:24,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:11:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-11-23 21:11:24,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143997647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:11:24,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630044974] [2023-11-23 21:11:24,842 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2023-11-23 21:11:24,842 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:11:24,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:11:24,852 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:11:24,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs