./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--serial--sierra.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_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/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_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--serial--sierra.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/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_08d67915-4aea-48ca-9134-a1abbfd69271/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 d6a36286e10ea43dd9b822762f3f2df49a2903c1188868a0fefb608a216bfe78 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:13:00,780 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:13:00,851 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:13:00,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:13:00,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:13:00,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:13:00,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:13:00,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:13:00,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:13:00,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:13:00,901 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:13:00,902 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:13:00,902 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:13:00,903 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:13:00,903 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:13:00,904 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:13:00,904 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:13:00,905 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:13:00,906 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:13:00,906 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:13:00,907 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:13:00,908 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:13:00,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:13:00,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:13:00,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:13:00,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:13:00,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:13:00,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:13:00,926 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:13:00,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:13:00,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:13:00,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:13:00,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:13:00,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:13:00,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:00,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:13:00,930 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:13:00,930 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:13:00,931 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:13:00,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:13:00,931 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:13:00,932 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:13:00,933 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:13:00,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:13:00,934 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_08d67915-4aea-48ca-9134-a1abbfd69271/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a36286e10ea43dd9b822762f3f2df49a2903c1188868a0fefb608a216bfe78 [2023-11-23 21:13:01,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:13:01,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:13:01,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:13:01,238 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:13:01,238 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:13:01,240 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--serial--sierra.ko-entry_point.cil.out.i [2023-11-23 21:13:04,445 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:13:05,011 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:13:05,012 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--serial--sierra.ko-entry_point.cil.out.i [2023-11-23 21:13:05,064 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/data/a18cd1a17/f327c6afece24d8d9a52fc94aa488015/FLAGa8a8efcac [2023-11-23 21:13:05,083 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/data/a18cd1a17/f327c6afece24d8d9a52fc94aa488015 [2023-11-23 21:13:05,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:13:05,093 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:13:05,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:05,095 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:13:05,101 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:13:05,102 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:05" (1/1) ... [2023-11-23 21:13:05,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb0ea00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:05, skipping insertion in model container [2023-11-23 21:13:05,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:05" (1/1) ... [2023-11-23 21:13:05,263 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:13:05,900 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3846] [2023-11-23 21:13:05,901 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3847-3848] [2023-11-23 21:13:06,090 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_08d67915-4aea-48ca-9134-a1abbfd69271/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--serial--sierra.ko-entry_point.cil.out.i[114996,115009] [2023-11-23 21:13:06,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:06,639 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:13:06,763 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3846] [2023-11-23 21:13:06,764 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3847-3848] [2023-11-23 21:13:06,773 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_08d67915-4aea-48ca-9134-a1abbfd69271/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--serial--sierra.ko-entry_point.cil.out.i[114996,115009] [2023-11-23 21:13:07,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:07,171 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:13:07,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07 WrapperNode [2023-11-23 21:13:07,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:07,175 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:07,175 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:13:07,175 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:13:07,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,271 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,436 INFO L138 Inliner]: procedures = 157, calls = 2028, calls flagged for inlining = 60, calls inlined = 53, statements flattened = 3485 [2023-11-23 21:13:07,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:07,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:13:07,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:13:07,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:13:07,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,487 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,595 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,703 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:13:07,704 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:13:07,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:13:07,704 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:13:07,705 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (1/1) ... [2023-11-23 21:13:07,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:07,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:07,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:13:07,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:13:07,788 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-23 21:13:07,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-23 21:13:07,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:13:07,790 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-23 21:13:07,791 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-23 21:13:07,791 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_tiocmget [2023-11-23 21:13:07,791 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_tiocmget [2023-11-23 21:13:07,791 INFO L130 BoogieDeclarations]: Found specification of procedure usb_mark_last_busy [2023-11-23 21:13:07,791 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_mark_last_busy [2023-11-23 21:13:07,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:13:07,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:13:07,792 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:13:07,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:13:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2023-11-23 21:13:07,793 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2023-11-23 21:13:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:13:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_calc_interface [2023-11-23 21:13:07,794 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_calc_interface [2023-11-23 21:13:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_port_data [2023-11-23 21:13:07,795 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_port_data [2023-11-23 21:13:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_resume [2023-11-23 21:13:07,796 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_resume [2023-11-23 21:13:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-23 21:13:07,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-23 21:13:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 21:13:07,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 21:13:07,797 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:13:07,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:13:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_close [2023-11-23 21:13:07,798 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_close [2023-11-23 21:13:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-23 21:13:07,799 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-23 21:13:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-23 21:13:07,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-23 21:13:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_write [2023-11-23 21:13:07,799 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_write [2023-11-23 21:13:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_submit_rx_urbs [2023-11-23 21:13:07,800 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_submit_rx_urbs [2023-11-23 21:13:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_port_probe [2023-11-23 21:13:07,800 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_port_probe [2023-11-23 21:13:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_send_setup [2023-11-23 21:13:07,800 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_send_setup [2023-11-23 21:13:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2023-11-23 21:13:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2023-11-23 21:13:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:13:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:13:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2023-11-23 21:13:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2023-11-23 21:13:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2023-11-23 21:13:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2023-11-23 21:13:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:13:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-23 21:13:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-23 21:13:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:13:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:13:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 21:13:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 21:13:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-23 21:13:07,804 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-23 21:13:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:13:07,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:13:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:13:07,806 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:13:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2023-11-23 21:13:07,806 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2023-11-23 21:13:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:13:07,806 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:13:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2023-11-23 21:13:07,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2023-11-23 21:13:07,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:13:07,807 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2023-11-23 21:13:07,807 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2023-11-23 21:13:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:13:07,808 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:13:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:13:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:13:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:13:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_dtr_rts [2023-11-23 21:13:07,809 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_dtr_rts [2023-11-23 21:13:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-23 21:13:07,809 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-23 21:13:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:13:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-23 21:13:07,810 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-23 21:13:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_chars_in_buffer [2023-11-23 21:13:07,810 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_chars_in_buffer [2023-11-23 21:13:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-23 21:13:07,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-23 21:13:07,811 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-23 21:13:07,811 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-23 21:13:07,811 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:13:07,811 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:13:07,811 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-23 21:13:07,812 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-23 21:13:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_write_room [2023-11-23 21:13:07,812 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_write_room [2023-11-23 21:13:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:13:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:13:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_instat_callback [2023-11-23 21:13:07,812 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_instat_callback [2023-11-23 21:13:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_stop_rx_urbs [2023-11-23 21:13:07,813 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_stop_rx_urbs [2023-11-23 21:13:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:13:07,813 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:13:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:13:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:13:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 21:13:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 21:13:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_port_remove [2023-11-23 21:13:07,815 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_port_remove [2023-11-23 21:13:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-23 21:13:07,815 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-23 21:13:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_calc_num_ports [2023-11-23 21:13:07,816 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_calc_num_ports [2023-11-23 21:13:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-23 21:13:07,816 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-23 21:13:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_tiocmset [2023-11-23 21:13:07,817 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_tiocmset [2023-11-23 21:13:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_release_urb [2023-11-23 21:13:07,817 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_release_urb [2023-11-23 21:13:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-23 21:13:07,817 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-23 21:13:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:13:07,818 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_open [2023-11-23 21:13:07,818 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_open [2023-11-23 21:13:07,818 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2023-11-23 21:13:07,818 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2023-11-23 21:13:07,818 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_from_anchor [2023-11-23 21:13:07,818 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_from_anchor [2023-11-23 21:13:07,819 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-23 21:13:07,819 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-23 21:13:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure sierra_suspend [2023-11-23 21:13:07,820 INFO L138 BoogieDeclarations]: Found implementation of procedure sierra_suspend [2023-11-23 21:13:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:13:07,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:13:07,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:13:07,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:13:07,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:13:08,403 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:13:08,406 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:13:08,630 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:13:12,292 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:13,087 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:13,088 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:13:13,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:13 BoogieIcfgContainer [2023-11-23 21:13:13,094 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:13,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:13,098 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:13,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:13,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:13:05" (1/3) ... [2023-11-23 21:13:13,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72eebbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:13, skipping insertion in model container [2023-11-23 21:13:13,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:07" (2/3) ... [2023-11-23 21:13:13,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72eebbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:13, skipping insertion in model container [2023-11-23 21:13:13,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:13" (3/3) ... [2023-11-23 21:13:13,117 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--serial--sierra.ko-entry_point.cil.out.i [2023-11-23 21:13:13,142 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:13,142 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:13:13,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:13,260 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;@2f9c0e54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:13,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:13:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 834 states, 513 states have (on average 1.3352826510721247) internal successors, (685), 526 states have internal predecessors, (685), 259 states have call successors, (259), 61 states have call predecessors, (259), 60 states have return successors, (256), 254 states have call predecessors, (256), 256 states have call successors, (256) [2023-11-23 21:13:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:13:13,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:13,293 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] [2023-11-23 21:13:13,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:13,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:13,302 INFO L85 PathProgramCache]: Analyzing trace with hash 642712879, now seen corresponding path program 1 times [2023-11-23 21:13:13,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:13,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111515522] [2023-11-23 21:13:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:14,327 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 21:13:14,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:14,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111515522] [2023-11-23 21:13:14,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111515522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:14,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:14,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:14,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660668862] [2023-11-23 21:13:14,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:14,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:14,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:14,383 INFO L87 Difference]: Start difference. First operand has 834 states, 513 states have (on average 1.3352826510721247) internal successors, (685), 526 states have internal predecessors, (685), 259 states have call successors, (259), 61 states have call predecessors, (259), 60 states have return successors, (256), 254 states have call predecessors, (256), 256 states have call successors, (256) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:13:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:15,499 INFO L93 Difference]: Finished difference Result 1689 states and 2458 transitions. [2023-11-23 21:13:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:15,501 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-11-23 21:13:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:15,523 INFO L225 Difference]: With dead ends: 1689 [2023-11-23 21:13:15,523 INFO L226 Difference]: Without dead ends: 853 [2023-11-23 21:13:15,534 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 21:13:15,538 INFO L413 NwaCegarLoop]: 1092 mSDtfsCounter, 49 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:15,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1978 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:13:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2023-11-23 21:13:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2023-11-23 21:13:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 533 states have (on average 1.3283302063789868) internal successors, (708), 541 states have internal predecessors, (708), 257 states have call successors, (257), 63 states have call predecessors, (257), 62 states have return successors, (256), 254 states have call predecessors, (256), 256 states have call successors, (256) [2023-11-23 21:13:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1221 transitions. [2023-11-23 21:13:15,730 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1221 transitions. Word has length 40 [2023-11-23 21:13:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:15,731 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1221 transitions. [2023-11-23 21:13:15,731 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:13:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1221 transitions. [2023-11-23 21:13:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:13:15,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:15,738 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-11-23 21:13:15,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:13:15,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:15,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash 931483586, now seen corresponding path program 1 times [2023-11-23 21:13:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:15,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684125669] [2023-11-23 21:13:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:13:16,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684125669] [2023-11-23 21:13:16,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684125669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:16,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:16,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:16,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196621876] [2023-11-23 21:13:16,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:16,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:16,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:16,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:16,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:16,525 INFO L87 Difference]: Start difference. First operand 853 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:17,877 INFO L93 Difference]: Finished difference Result 1944 states and 2792 transitions. [2023-11-23 21:13:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:17,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2023-11-23 21:13:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:17,888 INFO L225 Difference]: With dead ends: 1944 [2023-11-23 21:13:17,888 INFO L226 Difference]: Without dead ends: 1111 [2023-11-23 21:13:17,893 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 21:13:17,894 INFO L413 NwaCegarLoop]: 1064 mSDtfsCounter, 362 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:17,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 1893 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:13:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2023-11-23 21:13:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1108. [2023-11-23 21:13:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 722 states have (on average 1.296398891966759) internal successors, (936), 730 states have internal predecessors, (936), 295 states have call successors, (295), 91 states have call predecessors, (295), 90 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-23 21:13:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1525 transitions. [2023-11-23 21:13:17,984 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1525 transitions. Word has length 67 [2023-11-23 21:13:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:17,985 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1525 transitions. [2023-11-23 21:13:17,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1525 transitions. [2023-11-23 21:13:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:13:17,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:17,989 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-11-23 21:13:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:13:17,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:17,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash -616910178, now seen corresponding path program 1 times [2023-11-23 21:13:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:17,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749404805] [2023-11-23 21:13:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-23 21:13:18,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:18,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749404805] [2023-11-23 21:13:18,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749404805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:18,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:18,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:13:18,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134008204] [2023-11-23 21:13:18,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:18,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:18,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:18,867 INFO L87 Difference]: Start difference. First operand 1108 states and 1525 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:13:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:19,865 INFO L93 Difference]: Finished difference Result 1203 states and 1639 transitions. [2023-11-23 21:13:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:19,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2023-11-23 21:13:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:19,875 INFO L225 Difference]: With dead ends: 1203 [2023-11-23 21:13:19,876 INFO L226 Difference]: Without dead ends: 1200 [2023-11-23 21:13:19,877 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 21:13:19,879 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 1048 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:19,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 2461 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:13:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2023-11-23 21:13:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1192. [2023-11-23 21:13:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 771 states have (on average 1.2892347600518808) internal successors, (994), 780 states have internal predecessors, (994), 315 states have call successors, (315), 106 states have call predecessors, (315), 105 states have return successors, (314), 311 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-23 21:13:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1623 transitions. [2023-11-23 21:13:19,965 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1623 transitions. Word has length 69 [2023-11-23 21:13:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:19,966 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 1623 transitions. [2023-11-23 21:13:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:13:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1623 transitions. [2023-11-23 21:13:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-23 21:13:19,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:19,978 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-23 21:13:19,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:13:19,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:19,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash -210319526, now seen corresponding path program 1 times [2023-11-23 21:13:19,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:19,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108212579] [2023-11-23 21:13:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:13:21,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:21,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108212579] [2023-11-23 21:13:21,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108212579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:21,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:21,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:13:21,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899401859] [2023-11-23 21:13:21,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:21,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:13:21,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:13:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:13:21,012 INFO L87 Difference]: Start difference. First operand 1192 states and 1623 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 21:13:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:24,958 INFO L93 Difference]: Finished difference Result 3097 states and 4367 transitions. [2023-11-23 21:13:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:13:24,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 129 [2023-11-23 21:13:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:24,980 INFO L225 Difference]: With dead ends: 3097 [2023-11-23 21:13:24,980 INFO L226 Difference]: Without dead ends: 1925 [2023-11-23 21:13:24,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:24,992 INFO L413 NwaCegarLoop]: 1477 mSDtfsCounter, 889 mSDsluCounter, 3804 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 5281 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:24,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 5281 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-23 21:13:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2023-11-23 21:13:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1448. [2023-11-23 21:13:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 961 states have (on average 1.27159209157128) internal successors, (1222), 970 states have internal predecessors, (1222), 353 states have call successors, (353), 134 states have call predecessors, (353), 133 states have return successors, (352), 349 states have call predecessors, (352), 352 states have call successors, (352) [2023-11-23 21:13:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1927 transitions. [2023-11-23 21:13:25,107 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1927 transitions. Word has length 129 [2023-11-23 21:13:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:25,109 INFO L495 AbstractCegarLoop]: Abstraction has 1448 states and 1927 transitions. [2023-11-23 21:13:25,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 21:13:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1927 transitions. [2023-11-23 21:13:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-23 21:13:25,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:25,123 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:25,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:13:25,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:25,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1767854852, now seen corresponding path program 1 times [2023-11-23 21:13:25,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:25,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764934092] [2023-11-23 21:13:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:25,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:13:25,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:25,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764934092] [2023-11-23 21:13:25,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764934092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:25,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:25,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:13:25,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090147763] [2023-11-23 21:13:25,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:25,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:25,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:25,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:25,715 INFO L87 Difference]: Start difference. First operand 1448 states and 1927 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:13:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:27,116 INFO L93 Difference]: Finished difference Result 3367 states and 4556 transitions. [2023-11-23 21:13:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:13:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 136 [2023-11-23 21:13:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:27,133 INFO L225 Difference]: With dead ends: 3367 [2023-11-23 21:13:27,134 INFO L226 Difference]: Without dead ends: 1939 [2023-11-23 21:13:27,141 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 21:13:27,142 INFO L413 NwaCegarLoop]: 1434 mSDtfsCounter, 289 mSDsluCounter, 2575 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 4009 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:27,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 4009 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 21:13:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2023-11-23 21:13:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1450. [2023-11-23 21:13:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 963 states have (on average 1.2710280373831775) internal successors, (1224), 972 states have internal predecessors, (1224), 353 states have call successors, (353), 134 states have call predecessors, (353), 133 states have return successors, (352), 349 states have call predecessors, (352), 352 states have call successors, (352) [2023-11-23 21:13:27,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 1929 transitions. [2023-11-23 21:13:27,247 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 1929 transitions. Word has length 136 [2023-11-23 21:13:27,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:27,247 INFO L495 AbstractCegarLoop]: Abstraction has 1450 states and 1929 transitions. [2023-11-23 21:13:27,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:13:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 1929 transitions. [2023-11-23 21:13:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:13:27,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:27,255 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:13:27,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:27,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1272693303, now seen corresponding path program 1 times [2023-11-23 21:13:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:27,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669039655] [2023-11-23 21:13:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 21:13:28,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:28,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669039655] [2023-11-23 21:13:28,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669039655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:28,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:28,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:13:28,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699159161] [2023-11-23 21:13:28,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:28,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:13:28,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:13:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:28,917 INFO L87 Difference]: Start difference. First operand 1450 states and 1929 transitions. Second operand has 7 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:13:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:32,742 INFO L93 Difference]: Finished difference Result 2892 states and 3853 transitions. [2023-11-23 21:13:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:13:32,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 138 [2023-11-23 21:13:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:32,754 INFO L225 Difference]: With dead ends: 2892 [2023-11-23 21:13:32,755 INFO L226 Difference]: Without dead ends: 1462 [2023-11-23 21:13:32,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:32,762 INFO L413 NwaCegarLoop]: 1084 mSDtfsCounter, 0 mSDsluCounter, 5413 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6497 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:32,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6497 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-23 21:13:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2023-11-23 21:13:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1462. [2023-11-23 21:13:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 971 states have (on average 1.2687950566426365) internal successors, (1232), 980 states have internal predecessors, (1232), 353 states have call successors, (353), 134 states have call predecessors, (353), 137 states have return successors, (359), 353 states have call predecessors, (359), 352 states have call successors, (359) [2023-11-23 21:13:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1944 transitions. [2023-11-23 21:13:32,856 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1944 transitions. Word has length 138 [2023-11-23 21:13:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:32,858 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1944 transitions. [2023-11-23 21:13:32,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:13:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1944 transitions. [2023-11-23 21:13:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-23 21:13:32,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:32,915 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:32,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:13:32,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:32,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:32,917 INFO L85 PathProgramCache]: Analyzing trace with hash 962203225, now seen corresponding path program 1 times [2023-11-23 21:13:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:32,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895908202] [2023-11-23 21:13:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:32,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:13:33,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895908202] [2023-11-23 21:13:33,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895908202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077490702] [2023-11-23 21:13:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:33,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:33,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:33,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:33,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:13:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:34,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 3807 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:13:34,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:13:34,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:34,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077490702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:34,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:34,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-11-23 21:13:34,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79551207] [2023-11-23 21:13:34,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:34,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:34,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:34,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:13:34,995 INFO L87 Difference]: Start difference. First operand 1462 states and 1944 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-23 21:13:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:37,016 INFO L93 Difference]: Finished difference Result 3106 states and 4171 transitions. [2023-11-23 21:13:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:37,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 142 [2023-11-23 21:13:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:37,029 INFO L225 Difference]: With dead ends: 3106 [2023-11-23 21:13:37,030 INFO L226 Difference]: Without dead ends: 1664 [2023-11-23 21:13:37,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:13:37,038 INFO L413 NwaCegarLoop]: 1137 mSDtfsCounter, 451 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:37,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 2117 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 21:13:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2023-11-23 21:13:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1462. [2023-11-23 21:13:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 971 states have (on average 1.2687950566426365) internal successors, (1232), 980 states have internal predecessors, (1232), 353 states have call successors, (353), 134 states have call predecessors, (353), 137 states have return successors, (359), 353 states have call predecessors, (359), 352 states have call successors, (359) [2023-11-23 21:13:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1944 transitions. [2023-11-23 21:13:37,130 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1944 transitions. Word has length 142 [2023-11-23 21:13:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:37,131 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1944 transitions. [2023-11-23 21:13:37,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-23 21:13:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1944 transitions. [2023-11-23 21:13:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-23 21:13:37,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:37,139 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:37,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:37,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d67915-4aea-48ca-9134-a1abbfd69271/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:37,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:37,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2063361819, now seen corresponding path program 1 times [2023-11-23 21:13:37,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:37,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843843539] [2023-11-23 21:13:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:37,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 21:13:38,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:38,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843843539] [2023-11-23 21:13:38,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843843539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:38,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:38,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:13:38,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728957339] [2023-11-23 21:13:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:38,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:38,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:38,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:38,317 INFO L87 Difference]: Start difference. First operand 1462 states and 1944 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-23 21:13:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:40,715 INFO L93 Difference]: Finished difference Result 3215 states and 4320 transitions. [2023-11-23 21:13:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:40,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 162 [2023-11-23 21:13:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:40,732 INFO L225 Difference]: With dead ends: 3215 [2023-11-23 21:13:40,732 INFO L226 Difference]: Without dead ends: 1773 [2023-11-23 21:13:40,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 21:13:40,739 INFO L413 NwaCegarLoop]: 1346 mSDtfsCounter, 448 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 2322 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:40,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 2322 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:13:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2023-11-23 21:13:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1463. [2023-11-23 21:13:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 972 states have (on average 1.2685185185185186) internal successors, (1233), 981 states have internal predecessors, (1233), 353 states have call successors, (353), 134 states have call predecessors, (353), 137 states have return successors, (359), 353 states have call predecessors, (359), 352 states have call successors, (359) [2023-11-23 21:13:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 1945 transitions. [2023-11-23 21:13:40,825 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 1945 transitions. Word has length 162 [2023-11-23 21:13:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:40,826 INFO L495 AbstractCegarLoop]: Abstraction has 1463 states and 1945 transitions. [2023-11-23 21:13:40,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-23 21:13:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 1945 transitions. [2023-11-23 21:13:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-23 21:13:40,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:40,836 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:40,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:13:40,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:40,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1639784620, now seen corresponding path program 1 times [2023-11-23 21:13:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:40,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999267070] [2023-11-23 21:13:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:40,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 21:13:41,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:41,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999267070] [2023-11-23 21:13:41,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999267070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:41,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:41,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:13:41,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392345150] [2023-11-23 21:13:41,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:41,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:41,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:41,666 INFO L87 Difference]: Start difference. First operand 1463 states and 1945 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 21:13:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:44,508 INFO L93 Difference]: Finished difference Result 3597 states and 4805 transitions. [2023-11-23 21:13:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:13:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 179 [2023-11-23 21:13:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:44,524 INFO L225 Difference]: With dead ends: 3597 [2023-11-23 21:13:44,524 INFO L226 Difference]: Without dead ends: 2154 [2023-11-23 21:13:44,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 21:13:44,531 INFO L413 NwaCegarLoop]: 1413 mSDtfsCounter, 890 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 3537 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:44,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 3537 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-23 21:13:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2023-11-23 21:13:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1863. [2023-11-23 21:13:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1246 states have (on average 1.254414125200642) internal successors, (1563), 1257 states have internal predecessors, (1563), 433 states have call successors, (433), 180 states have call predecessors, (433), 183 states have return successors, (439), 433 states have call predecessors, (439), 432 states have call successors, (439) [2023-11-23 21:13:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2435 transitions. [2023-11-23 21:13:44,667 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2435 transitions. Word has length 179 [2023-11-23 21:13:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:44,668 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 2435 transitions. [2023-11-23 21:13:44,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 21:13:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2435 transitions. [2023-11-23 21:13:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-23 21:13:44,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:44,680 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:44,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:13:44,681 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:44,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:44,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2026564933, now seen corresponding path program 1 times [2023-11-23 21:13:44,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:44,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560756183] [2023-11-23 21:13:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:44,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-23 21:13:46,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:46,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560756183] [2023-11-23 21:13:46,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560756183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:46,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:46,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:13:46,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975383514] [2023-11-23 21:13:46,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:46,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:13:46,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:13:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:13:46,111 INFO L87 Difference]: Start difference. First operand 1863 states and 2435 transitions. Second operand has 5 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29)