./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/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_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/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_235b2187-ab96-4c60-86ef-6df5c6fbacf9/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 91e04004830698389104523fd95ec19013bffc6ed609cfb90049e6e93edb2bb3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:11:41,562 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:11:41,649 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:11:41,656 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:11:41,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:11:41,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:11:41,685 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:11:41,686 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:11:41,687 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:11:41,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:11:41,688 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:11:41,688 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:11:41,689 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:11:41,689 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:11:41,690 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:11:41,690 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:11:41,691 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:11:41,691 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:11:41,692 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:11:41,693 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:11:41,693 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:11:41,694 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:11:41,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:11:41,695 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:11:41,695 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:11:41,696 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:11:41,696 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:11:41,697 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:11:41,697 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:11:41,698 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:11:41,698 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:11:41,698 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:11:41,699 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:11:41,699 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:11:41,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:41,700 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:11:41,701 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:11:41,701 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:11:41,701 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:11:41,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:11:41,702 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:11:41,702 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:11:41,702 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:11:41,702 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:11:41,703 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_235b2187-ab96-4c60-86ef-6df5c6fbacf9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91e04004830698389104523fd95ec19013bffc6ed609cfb90049e6e93edb2bb3 [2023-11-23 21:11:41,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:11:42,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:11:42,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:11:42,032 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:11:42,033 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:11:42,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i [2023-11-23 21:11:45,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:11:45,823 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:11:45,823 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i [2023-11-23 21:11:45,870 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/data/29b4c3e92/0fe75f69476a4347ad1074c637806cd2/FLAGbd591e45d [2023-11-23 21:11:45,890 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/data/29b4c3e92/0fe75f69476a4347ad1074c637806cd2 [2023-11-23 21:11:45,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:11:45,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:11:45,897 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:45,897 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:11:45,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:11:45,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:11:45" (1/1) ... [2023-11-23 21:11:45,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e8acf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:45, skipping insertion in model container [2023-11-23 21:11:45,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:11:45" (1/1) ... [2023-11-23 21:11:46,024 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:11:47,358 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_235b2187-ab96-4c60-86ef-6df5c6fbacf9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i[143316,143329] [2023-11-23 21:11:47,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:47,438 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:11:47,548 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [3278] [2023-11-23 21:11:47,550 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3281] [2023-11-23 21:11:47,551 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3284] [2023-11-23 21:11:47,551 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3287] [2023-11-23 21:11:47,552 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [3300] [2023-11-23 21:11:47,689 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_235b2187-ab96-4c60-86ef-6df5c6fbacf9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i[143316,143329] [2023-11-23 21:11:47,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:47,771 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:47,771 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:47,779 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:11:47,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47 WrapperNode [2023-11-23 21:11:47,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:47,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:47,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:11:47,782 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:11:47,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:47,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:47,927 INFO L138 Inliner]: procedures = 142, calls = 672, calls flagged for inlining = 62, calls inlined = 59, statements flattened = 2173 [2023-11-23 21:11:47,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:47,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:11:47,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:11:47,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:11:47,938 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:47,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:47,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:47,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:48,121 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:48,135 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:48,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:48,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:48,213 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:11:48,214 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:11:48,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:11:48,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:11:48,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (1/1) ... [2023-11-23 21:11:48,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:48,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:11:48,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_235b2187-ab96-4c60-86ef-6df5c6fbacf9/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:11:48,298 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-23 21:11:48,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-23 21:11:48,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:11:48,299 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2023-11-23 21:11:48,299 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2023-11-23 21:11:48,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:11:48,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:11:48,299 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:11:48,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:11:48,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:11:48,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:11:48,301 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:11:48,301 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2023-11-23 21:11:48,302 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2023-11-23 21:11:48,302 INFO L130 BoogieDeclarations]: Found specification of procedure retry_transmit [2023-11-23 21:11:48,302 INFO L138 BoogieDeclarations]: Found implementation of procedure retry_transmit [2023-11-23 21:11:48,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:11:48,303 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:11:48,304 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-23 21:11:48,304 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-23 21:11:48,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-23 21:11:48,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-23 21:11:48,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:11:48,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:11:48,306 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_close [2023-11-23 21:11:48,306 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_close [2023-11-23 21:11:48,306 INFO L130 BoogieDeclarations]: Found specification of procedure remove_msg [2023-11-23 21:11:48,306 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_msg [2023-11-23 21:11:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2023-11-23 21:11:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2023-11-23 21:11:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure task_pid [2023-11-23 21:11:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure task_pid [2023-11-23 21:11:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:11:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:11:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unlock [2023-11-23 21:11:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unlock [2023-11-23 21:11:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:11:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2023-11-23 21:11:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2023-11-23 21:11:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:11:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:11:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:11:48,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:11:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:11:48,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:11:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure add_msg [2023-11-23 21:11:48,309 INFO L138 BoogieDeclarations]: Found implementation of procedure add_msg [2023-11-23 21:11:48,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:11:48,310 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2023-11-23 21:11:48,310 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2023-11-23 21:11:48,310 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 21:11:48,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 21:11:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:11:48,311 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:11:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_poll [2023-11-23 21:11:48,312 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_poll [2023-11-23 21:11:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:11:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2023-11-23 21:11:48,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2023-11-23 21:11:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:11:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:11:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-23 21:11:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-23 21:11:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure findClient [2023-11-23 21:11:48,314 INFO L138 BoogieDeclarations]: Found implementation of procedure findClient [2023-11-23 21:11:48,315 INFO L130 BoogieDeclarations]: Found specification of procedure put_char [2023-11-23 21:11:48,316 INFO L138 BoogieDeclarations]: Found implementation of procedure put_char [2023-11-23 21:11:48,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:11:48,316 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-23 21:11:48,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-23 21:11:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure put_pid [2023-11-23 21:11:48,317 INFO L138 BoogieDeclarations]: Found implementation of procedure put_pid [2023-11-23 21:11:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2023-11-23 21:11:48,317 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2023-11-23 21:11:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure remove_client_block [2023-11-23 21:11:48,317 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_client_block [2023-11-23 21:11:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:11:48,318 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:11:48,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:11:48,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:11:48,319 INFO L130 BoogieDeclarations]: Found specification of procedure on_receive_block [2023-11-23 21:11:48,319 INFO L138 BoogieDeclarations]: Found implementation of procedure on_receive_block [2023-11-23 21:11:48,319 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:11:48,319 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:11:48,320 INFO L130 BoogieDeclarations]: Found specification of procedure flush [2023-11-23 21:11:48,320 INFO L138 BoogieDeclarations]: Found implementation of procedure flush [2023-11-23 21:11:48,320 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_set_termios [2023-11-23 21:11:48,320 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_set_termios [2023-11-23 21:11:48,320 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 21:11:48,320 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 21:11:48,320 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_ioctl [2023-11-23 21:11:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_ioctl [2023-11-23 21:11:48,321 INFO L130 BoogieDeclarations]: Found specification of procedure remove_from_tx_queue [2023-11-23 21:11:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_from_tx_queue [2023-11-23 21:11:48,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:11:48,321 INFO L130 BoogieDeclarations]: Found specification of procedure tty_lock [2023-11-23 21:11:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_lock [2023-11-23 21:11:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure trigger_transmit [2023-11-23 21:11:48,322 INFO L138 BoogieDeclarations]: Found implementation of procedure trigger_transmit [2023-11-23 21:11:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:11:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:11:48,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:11:48,742 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:11:48,746 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:11:48,929 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:11:52,984 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:11:53,894 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:11:53,895 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:11:53,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:53 BoogieIcfgContainer [2023-11-23 21:11:53,897 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:11:53,899 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:11:53,900 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:11:53,903 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:11:53,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:11:45" (1/3) ... [2023-11-23 21:11:53,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6141027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:53, skipping insertion in model container [2023-11-23 21:11:53,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:47" (2/3) ... [2023-11-23 21:11:53,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6141027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:53, skipping insertion in model container [2023-11-23 21:11:53,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:53" (3/3) ... [2023-11-23 21:11:53,908 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i [2023-11-23 21:11:53,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:11:53,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:11:54,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:11:54,031 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;@344af428, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:11:54,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:11:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 614 states, 379 states have (on average 1.3984168865435356) internal successors, (530), 415 states have internal predecessors, (530), 192 states have call successors, (192), 42 states have call predecessors, (192), 41 states have return successors, (188), 178 states have call predecessors, (188), 188 states have call successors, (188) [2023-11-23 21:11:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-23 21:11:54,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:54,060 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:54,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:54,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:54,066 INFO L85 PathProgramCache]: Analyzing trace with hash 250607148, now seen corresponding path program 1 times [2023-11-23 21:11:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:54,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025315619] [2023-11-23 21:11:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-23 21:11:54,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:54,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025315619] [2023-11-23 21:11:54,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025315619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:54,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:54,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:11:54,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666930567] [2023-11-23 21:11:54,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:54,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:54,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:54,860 INFO L87 Difference]: Start difference. First operand has 614 states, 379 states have (on average 1.3984168865435356) internal successors, (530), 415 states have internal predecessors, (530), 192 states have call successors, (192), 42 states have call predecessors, (192), 41 states have return successors, (188), 178 states have call predecessors, (188), 188 states have call successors, (188) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:11:59,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:01,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:01,284 INFO L93 Difference]: Finished difference Result 1439 states and 2154 transitions. [2023-11-23 21:12:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:01,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 135 [2023-11-23 21:12:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:01,352 INFO L225 Difference]: With dead ends: 1439 [2023-11-23 21:12:01,352 INFO L226 Difference]: Without dead ends: 838 [2023-11-23 21:12:01,369 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 21:12:01,379 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 385 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:01,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1556 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2023-11-23 21:12:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-11-23 21:12:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 835. [2023-11-23 21:12:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 515 states have (on average 1.3786407766990292) internal successors, (710), 562 states have internal predecessors, (710), 253 states have call successors, (253), 67 states have call predecessors, (253), 66 states have return successors, (252), 237 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-23 21:12:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1215 transitions. [2023-11-23 21:12:01,552 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1215 transitions. Word has length 135 [2023-11-23 21:12:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:01,556 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1215 transitions. [2023-11-23 21:12:01,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:12:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1215 transitions. [2023-11-23 21:12:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 21:12:01,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:01,574 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:01,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:01,575 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:01,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash -661962224, now seen corresponding path program 1 times [2023-11-23 21:12:01,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:01,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717902500] [2023-11-23 21:12:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-23 21:12:02,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:02,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717902500] [2023-11-23 21:12:02,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717902500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:02,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:02,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:02,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113551078] [2023-11-23 21:12:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:02,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:02,081 INFO L87 Difference]: Start difference. First operand 835 states and 1215 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:12:06,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:08,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:12,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:14,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:16,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:18,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:20,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:22,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:22,499 INFO L93 Difference]: Finished difference Result 3206 states and 4749 transitions. [2023-11-23 21:12:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:12:22,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 146 [2023-11-23 21:12:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:22,527 INFO L225 Difference]: With dead ends: 3206 [2023-11-23 21:12:22,527 INFO L226 Difference]: Without dead ends: 2413 [2023-11-23 21:12:22,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:22,534 INFO L413 NwaCegarLoop]: 852 mSDtfsCounter, 2189 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 340 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2189 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:22,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2189 Valid, 2020 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 690 Invalid, 8 Unknown, 0 Unchecked, 20.1s Time] [2023-11-23 21:12:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2023-11-23 21:12:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2397. [2023-11-23 21:12:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 1495 states have (on average 1.385953177257525) internal successors, (2072), 1626 states have internal predecessors, (2072), 713 states have call successors, (713), 189 states have call predecessors, (713), 188 states have return successors, (780), 671 states have call predecessors, (780), 712 states have call successors, (780) [2023-11-23 21:12:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3565 transitions. [2023-11-23 21:12:22,776 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3565 transitions. Word has length 146 [2023-11-23 21:12:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:22,779 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 3565 transitions. [2023-11-23 21:12:22,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:12:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3565 transitions. [2023-11-23 21:12:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-23 21:12:22,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:22,784 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:22,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:12:22,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:22,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1296407796, now seen corresponding path program 1 times [2023-11-23 21:12:22,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:22,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016724186] [2023-11-23 21:12:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:22,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-23 21:12:23,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:23,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016724186] [2023-11-23 21:12:23,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016724186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:23,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:23,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:23,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117796237] [2023-11-23 21:12:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:23,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:23,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:23,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:23,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:23,109 INFO L87 Difference]: Start difference. First operand 2397 states and 3565 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:12:26,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:28,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:30,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:34,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:37,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:39,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:41,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:43,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []