./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/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_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/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_1dfb5337-dc82-462d-a8da-8181d435a01f/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 7d6844ab51374c8e656234daa6d7df2c3927c38bae9fcbeafc3fadf6f3b893b1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:16:14,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:16:14,978 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:16:14,983 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:16:14,983 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:16:15,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:16:15,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:16:15,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:16:15,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:16:15,035 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:16:15,036 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:16:15,036 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:16:15,037 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:16:15,038 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:16:15,039 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:16:15,039 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:16:15,040 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:16:15,040 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:16:15,041 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:16:15,041 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:16:15,042 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:16:15,043 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:16:15,043 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:16:15,044 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:16:15,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:16:15,045 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:16:15,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:16:15,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:16:15,046 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:16:15,046 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:16:15,063 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:16:15,064 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:16:15,064 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:16:15,064 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:16:15,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:15,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:16:15,066 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:16:15,067 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:16:15,067 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:16:15,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:16:15,067 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:16:15,068 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:16:15,068 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:16:15,068 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:16:15,069 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_1dfb5337-dc82-462d-a8da-8181d435a01f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d6844ab51374c8e656234daa6d7df2c3927c38bae9fcbeafc3fadf6f3b893b1 [2023-11-23 21:16:15,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:16:15,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:16:15,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:16:15,392 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:16:15,393 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:16:15,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2023-11-23 21:16:18,368 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:16:18,925 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:16:18,925 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2023-11-23 21:16:18,974 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/data/7d79c030e/205892c19eda42a9aa8d6d999fb07416/FLAGd838ea3a0 [2023-11-23 21:16:18,992 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/data/7d79c030e/205892c19eda42a9aa8d6d999fb07416 [2023-11-23 21:16:18,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:16:18,999 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:16:19,002 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:19,002 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:16:19,007 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:16:19,008 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:18" (1/1) ... [2023-11-23 21:16:19,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aff3da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:19, skipping insertion in model container [2023-11-23 21:16:19,009 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:18" (1/1) ... [2023-11-23 21:16:19,115 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:16:20,182 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_1dfb5337-dc82-462d-a8da-8181d435a01f/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i[132927,132940] [2023-11-23 21:16:20,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:20,370 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:16:20,420 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [1076] [2023-11-23 21:16:20,422 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [1083] [2023-11-23 21:16:20,545 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_1dfb5337-dc82-462d-a8da-8181d435a01f/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i[132927,132940] [2023-11-23 21:16:20,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:20,738 WARN L675 CHandler]: The function strcspn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:20,739 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:20,747 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:16:20,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20 WrapperNode [2023-11-23 21:16:20,748 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:20,749 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:20,749 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:16:20,749 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:16:20,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:20,865 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,200 INFO L138 Inliner]: procedures = 133, calls = 5580, calls flagged for inlining = 57, calls inlined = 51, statements flattened = 6709 [2023-11-23 21:16:21,201 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:21,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:16:21,202 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:16:21,202 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:16:21,212 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,286 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,300 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,518 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,533 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,562 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:16:21,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:16:21,622 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:16:21,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:16:21,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (1/1) ... [2023-11-23 21:16:21,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:21,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:21,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:16:21,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfb5337-dc82-462d-a8da-8181d435a01f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:16:21,693 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_while_busy [2023-11-23 21:16:21,693 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_while_busy [2023-11-23 21:16:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-11-23 21:16:21,695 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-11-23 21:16:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_for_read [2023-11-23 21:16:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_for_read [2023-11-23 21:16:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-11-23 21:16:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-11-23 21:16:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2023-11-23 21:16:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2023-11-23 21:16:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure dmi_get_system_info [2023-11-23 21:16:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure dmi_get_system_info [2023-11-23 21:16:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:16:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read [2023-11-23 21:16:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read [2023-11-23 21:16:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:16:21,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:16:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:16:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:16:21,699 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:16:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:16:21,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:16:21,700 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2023-11-23 21:16:21,701 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2023-11-23 21:16:21,701 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2023-11-23 21:16:21,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2023-11-23 21:16:21,702 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_suspend [2023-11-23 21:16:21,702 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_suspend [2023-11-23 21:16:21,702 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read_increment_offset [2023-11-23 21:16:21,702 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read_increment_offset [2023-11-23 21:16:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:16:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2023-11-23 21:16:21,703 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2023-11-23 21:16:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 21:16:21,704 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 21:16:21,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:16:21,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:16:21,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:16:21,705 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_update_device [2023-11-23 21:16:21,705 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_update_device [2023-11-23 21:16:21,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:16:21,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:16:21,706 INFO L130 BoogieDeclarations]: Found specification of procedure platform_set_drvdata [2023-11-23 21:16:21,706 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_set_drvdata [2023-11-23 21:16:21,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:16:21,706 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2023-11-23 21:16:21,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2023-11-23 21:16:21,707 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:16:21,707 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:16:21,707 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2023-11-23 21:16:21,707 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-23 21:16:21,707 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-23 21:16:21,707 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-23 21:16:21,708 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-23 21:16:21,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:16:21,708 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2023-11-23 21:16:21,708 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2023-11-23 21:16:21,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:16:21,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:16:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_resume [2023-11-23 21:16:21,711 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_resume [2023-11-23 21:16:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:16:21,711 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:16:22,038 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:16:22,042 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:16:35,236 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:16:36,684 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:16:36,685 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:16:36,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:36 BoogieIcfgContainer [2023-11-23 21:16:36,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:16:36,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:16:36,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:16:36,694 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:16:36,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:16:18" (1/3) ... [2023-11-23 21:16:36,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8d5222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:36, skipping insertion in model container [2023-11-23 21:16:36,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:20" (2/3) ... [2023-11-23 21:16:36,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8d5222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:36, skipping insertion in model container [2023-11-23 21:16:36,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:36" (3/3) ... [2023-11-23 21:16:36,700 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2023-11-23 21:16:36,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:16:36,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:16:36,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:16:36,813 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;@2d8d9648, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:16:36,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:16:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 395 states, 269 states have (on average 1.420074349442379) internal successors, (382), 278 states have internal predecessors, (382), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-23 21:16:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:16:36,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:36,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:36,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:36,843 INFO L85 PathProgramCache]: Analyzing trace with hash 133594370, now seen corresponding path program 1 times [2023-11-23 21:16:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:36,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246593592] [2023-11-23 21:16:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:39,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:39,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246593592] [2023-11-23 21:16:39,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246593592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:39,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:39,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:39,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207434556] [2023-11-23 21:16:39,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:39,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:39,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:39,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:39,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:39,060 INFO L87 Difference]: Start difference. First operand has 395 states, 269 states have (on average 1.420074349442379) internal successors, (382), 278 states have internal predecessors, (382), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:16:40,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:40,047 INFO L93 Difference]: Finished difference Result 1112 states and 1654 transitions. [2023-11-23 21:16:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:16:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-23 21:16:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:40,078 INFO L225 Difference]: With dead ends: 1112 [2023-11-23 21:16:40,078 INFO L226 Difference]: Without dead ends: 716 [2023-11-23 21:16:40,089 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 21:16:40,093 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 548 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:40,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 916 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:16:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-11-23 21:16:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 712. [2023-11-23 21:16:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 485 states have (on average 1.4082474226804125) internal successors, (683), 495 states have internal predecessors, (683), 179 states have call successors, (179), 48 states have call predecessors, (179), 47 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) [2023-11-23 21:16:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1036 transitions. [2023-11-23 21:16:40,246 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1036 transitions. Word has length 15 [2023-11-23 21:16:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:40,247 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 1036 transitions. [2023-11-23 21:16:40,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:16:40,247 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1036 transitions. [2023-11-23 21:16:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 21:16:40,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:40,250 INFO L195 NwaCegarLoop]: trace histogram [1, 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 21:16:40,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:16:40,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:40,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1211404261, now seen corresponding path program 1 times [2023-11-23 21:16:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:40,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43276433] [2023-11-23 21:16:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:41,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:41,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43276433] [2023-11-23 21:16:41,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43276433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:41,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:41,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:41,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860323154] [2023-11-23 21:16:41,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:41,446 INFO L87 Difference]: Start difference. First operand 712 states and 1036 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:42,427 INFO L93 Difference]: Finished difference Result 1755 states and 2535 transitions. [2023-11-23 21:16:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:16:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 21:16:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:42,437 INFO L225 Difference]: With dead ends: 1755 [2023-11-23 21:16:42,437 INFO L226 Difference]: Without dead ends: 1044 [2023-11-23 21:16:42,441 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 21:16:42,445 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 503 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:42,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 999 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:16:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2023-11-23 21:16:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1018. [2023-11-23 21:16:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 697 states have (on average 1.4031563845050214) internal successors, (978), 713 states have internal predecessors, (978), 249 states have call successors, (249), 72 states have call predecessors, (249), 71 states have return successors, (244), 241 states have call predecessors, (244), 244 states have call successors, (244) [2023-11-23 21:16:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1471 transitions. [2023-11-23 21:16:42,526 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1471 transitions. Word has length 25 [2023-11-23 21:16:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:42,527 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1471 transitions. [2023-11-23 21:16:42,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1471 transitions. [2023-11-23 21:16:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:16:42,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:42,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 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 21:16:42,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:16:42,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:42,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash -357726383, now seen corresponding path program 1 times [2023-11-23 21:16:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:42,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010905775] [2023-11-23 21:16:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:42,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:43,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:43,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010905775] [2023-11-23 21:16:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010905775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:43,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:43,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:43,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489822939] [2023-11-23 21:16:43,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:43,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:43,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:43,741 INFO L87 Difference]: Start difference. First operand 1018 states and 1471 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:44,421 INFO L93 Difference]: Finished difference Result 1020 states and 1472 transitions. [2023-11-23 21:16:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:16:44,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-23 21:16:44,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:44,432 INFO L225 Difference]: With dead ends: 1020 [2023-11-23 21:16:44,433 INFO L226 Difference]: Without dead ends: 1017 [2023-11-23 21:16:44,438 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 21:16:44,442 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 554 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:44,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 491 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:16:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2023-11-23 21:16:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1017. [2023-11-23 21:16:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 697 states have (on average 1.4017216642754662) internal successors, (977), 712 states have internal predecessors, (977), 248 states have call successors, (248), 72 states have call predecessors, (248), 71 states have return successors, (244), 241 states have call predecessors, (244), 244 states have call successors, (244) [2023-11-23 21:16:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1469 transitions. [2023-11-23 21:16:44,531 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1469 transitions. Word has length 27 [2023-11-23 21:16:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:44,531 INFO L495 AbstractCegarLoop]: Abstraction has 1017 states and 1469 transitions. [2023-11-23 21:16:44,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1469 transitions. [2023-11-23 21:16:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:16:44,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:44,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 21:16:44,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:16:44,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:44,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:44,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1795162762, now seen corresponding path program 1 times [2023-11-23 21:16:44,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:44,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103329587] [2023-11-23 21:16:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:44,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:45,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103329587] [2023-11-23 21:16:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103329587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:45,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:45,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:45,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315666828] [2023-11-23 21:16:45,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:45,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:45,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:45,804 INFO L87 Difference]: Start difference. First operand 1017 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:46,423 INFO L93 Difference]: Finished difference Result 1019 states and 1470 transitions. [2023-11-23 21:16:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:16:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-23 21:16:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:46,431 INFO L225 Difference]: With dead ends: 1019 [2023-11-23 21:16:46,431 INFO L226 Difference]: Without dead ends: 1016 [2023-11-23 21:16:46,432 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 21:16:46,433 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 551 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:46,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 489 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:16:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2023-11-23 21:16:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1016. [2023-11-23 21:16:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 697 states have (on average 1.4002869440459111) internal successors, (976), 711 states have internal predecessors, (976), 247 states have call successors, (247), 72 states have call predecessors, (247), 71 states have return successors, (244), 241 states have call predecessors, (244), 244 states have call successors, (244) [2023-11-23 21:16:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1467 transitions. [2023-11-23 21:16:46,500 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1467 transitions. Word has length 28 [2023-11-23 21:16:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:46,500 INFO L495 AbstractCegarLoop]: Abstraction has 1016 states and 1467 transitions. [2023-11-23 21:16:46,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1467 transitions. [2023-11-23 21:16:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:16:46,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:46,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 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 21:16:46,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:16:46,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:46,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash -184745612, now seen corresponding path program 1 times [2023-11-23 21:16:46,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:46,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980811423] [2023-11-23 21:16:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:47,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980811423] [2023-11-23 21:16:47,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980811423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:47,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:47,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:47,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104492307] [2023-11-23 21:16:47,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:47,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:47,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:47,465 INFO L87 Difference]: Start difference. First operand 1016 states and 1467 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:48,219 INFO L93 Difference]: Finished difference Result 2474 states and 3571 transitions. [2023-11-23 21:16:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:16:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-23 21:16:48,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:48,233 INFO L225 Difference]: With dead ends: 2474 [2023-11-23 21:16:48,233 INFO L226 Difference]: Without dead ends: 1715 [2023-11-23 21:16:48,237 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 21:16:48,238 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 487 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:48,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 914 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:16:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2023-11-23 21:16:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1712. [2023-11-23 21:16:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1173 states have (on average 1.392156862745098) internal successors, (1633), 1204 states have internal predecessors, (1633), 423 states have call successors, (423), 123 states have call predecessors, (423), 115 states have return successors, (416), 402 states have call predecessors, (416), 416 states have call successors, (416) [2023-11-23 21:16:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2472 transitions. [2023-11-23 21:16:48,406 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2472 transitions. Word has length 29 [2023-11-23 21:16:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:48,407 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 2472 transitions. [2023-11-23 21:16:48,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2472 transitions. [2023-11-23 21:16:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:16:48,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:48,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:48,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:16:48,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:48,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash 591209531, now seen corresponding path program 1 times [2023-11-23 21:16:48,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:48,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292947337] [2023-11-23 21:16:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:48,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:16:50,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:50,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292947337] [2023-11-23 21:16:50,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292947337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:50,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:50,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:16:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884769490] [2023-11-23 21:16:50,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:16:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:50,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:16:50,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:16:50,193 INFO L87 Difference]: Start difference. First operand 1712 states and 2472 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:16:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:51,191 INFO L93 Difference]: Finished difference Result 3049 states and 4385 transitions. [2023-11-23 21:16:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:16:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-11-23 21:16:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:51,205 INFO L225 Difference]: With dead ends: 3049 [2023-11-23 21:16:51,205 INFO L226 Difference]: Without dead ends: 1726 [2023-11-23 21:16:51,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:16:51,212 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 17 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:51,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1475 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:16:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2023-11-23 21:16:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1714. [2023-11-23 21:16:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1175 states have (on average 1.3880851063829787) internal successors, (1631), 1206 states have internal predecessors, (1631), 423 states have call successors, (423), 123 states have call predecessors, (423), 115 states have return successors, (416), 402 states have call predecessors, (416), 416 states have call successors, (416) [2023-11-23 21:16:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2470 transitions. [2023-11-23 21:16:51,335 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2470 transitions. Word has length 48 [2023-11-23 21:16:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:51,335 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2470 transitions. [2023-11-23 21:16:51,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:16:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2470 transitions. [2023-11-23 21:16:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 21:16:51,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:51,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:51,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:16:51,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:51,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:51,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1103868046, now seen corresponding path program 1 times [2023-11-23 21:16:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:51,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428503525] [2023-11-23 21:16:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:16:53,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:53,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428503525] [2023-11-23 21:16:53,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428503525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:53,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:53,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:16:53,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134346814] [2023-11-23 21:16:53,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:53,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:16:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:16:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:16:53,300 INFO L87 Difference]: Start difference. First operand 1714 states and 2470 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:16:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:54,764 INFO L93 Difference]: Finished difference Result 3716 states and 5334 transitions. [2023-11-23 21:16:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:16:54,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-11-23 21:16:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:54,787 INFO L225 Difference]: With dead ends: 3716 [2023-11-23 21:16:54,787 INFO L226 Difference]: Without dead ends: 2393 [2023-11-23 21:16:54,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:16:54,800 INFO L413 NwaCegarLoop]: 915 mSDtfsCounter, 864 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:54,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1394 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:16:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2023-11-23 21:16:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2219. [2023-11-23 21:16:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 1528 states have (on average 1.3893979057591623) internal successors, (2123), 1565 states have internal predecessors, (2123), 542 states have call successors, (542), 158 states have call predecessors, (542), 148 states have return successors, (535), 519 states have call predecessors, (535), 535 states have call successors, (535) [2023-11-23 21:16:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 3200 transitions. [2023-11-23 21:16:55,029 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 3200 transitions. Word has length 51 [2023-11-23 21:16:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:55,030 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 3200 transitions. [2023-11-23 21:16:55,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:16:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 3200 transitions. [2023-11-23 21:16:55,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 21:16:55,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:55,036 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:55,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:16:55,036 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:55,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:55,037 INFO L85 PathProgramCache]: Analyzing trace with hash -903277456, now seen corresponding path program 1 times [2023-11-23 21:16:55,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:55,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049279445] [2023-11-23 21:16:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:55,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:16:57,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:57,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049279445] [2023-11-23 21:16:57,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049279445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:57,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:57,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:16:57,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110304531] [2023-11-23 21:16:57,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:57,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:16:57,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:16:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:16:57,559 INFO L87 Difference]: Start difference. First operand 2219 states and 3200 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:16:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:59,076 INFO L93 Difference]: Finished difference Result 4630 states and 6774 transitions. [2023-11-23 21:16:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:16:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2023-11-23 21:16:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:59,101 INFO L225 Difference]: With dead ends: 4630 [2023-11-23 21:16:59,101 INFO L226 Difference]: Without dead ends: 2802 [2023-11-23 21:16:59,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:16:59,111 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 231 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:59,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 2401 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 21:16:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2023-11-23 21:16:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2231. [2023-11-23 21:16:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 1540 states have (on average 1.3876623376623376) internal successors, (2137), 1577 states have internal predecessors, (2137), 542 states have call successors, (542), 158 states have call predecessors, (542), 148 states have return successors, (535), 519 states have call predecessors, (535), 535 states have call successors, (535) [2023-11-23 21:16:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 3214 transitions. [2023-11-23 21:16:59,290 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 3214 transitions. Word has length 62 [2023-11-23 21:16:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:59,290 INFO L495 AbstractCegarLoop]: Abstraction has 2231 states and 3214 transitions. [2023-11-23 21:16:59,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:16:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 3214 transitions. [2023-11-23 21:16:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 21:16:59,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:59,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:16:59,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:59,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1931444261, now seen corresponding path program 1 times [2023-11-23 21:16:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:59,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569695407] [2023-11-23 21:16:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:17:00,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:00,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569695407] [2023-11-23 21:17:00,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569695407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:00,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:00,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811028853] [2023-11-23 21:17:00,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:00,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:00,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:00,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:00,262 INFO L87 Difference]: Start difference. First operand 2231 states and 3214 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11)