./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 9bd2c7ff 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_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/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_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ --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-9bd2c7f [2023-11-19 04:51:38,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:51:38,859 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:51:38,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:51:38,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:51:38,895 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:51:38,896 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:51:38,897 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:51:38,898 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:51:38,899 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:51:38,899 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:51:38,900 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:51:38,901 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:51:38,901 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:51:38,902 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:51:38,902 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:51:38,903 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:51:38,903 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:51:38,904 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:51:38,905 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:51:38,905 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:51:38,906 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:51:38,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:51:38,907 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:51:38,908 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:51:38,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:51:38,909 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:51:38,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:51:38,910 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:51:38,911 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:51:38,911 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:51:38,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:51:38,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:51:38,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:51:38,913 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:51:38,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:51:38,914 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:51:38,915 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:51:38,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:51:38,916 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:51:38,916 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:51:38,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:51:38,917 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_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91e04004830698389104523fd95ec19013bffc6ed609cfb90049e6e93edb2bb3 [2023-11-19 04:51:39,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:51:39,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:51:39,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:51:39,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:51:39,176 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:51:39,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/../../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 [2023-11-19 04:51:42,369 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:51:42,898 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:51:42,899 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/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 [2023-11-19 04:51:42,935 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/data/4b9a81ef8/15641c23caa0430da013edc8bc22cb3e/FLAGe410fb9ca [2023-11-19 04:51:42,952 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/data/4b9a81ef8/15641c23caa0430da013edc8bc22cb3e [2023-11-19 04:51:42,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:51:42,956 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:51:42,958 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:51:42,958 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:51:42,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:51:42,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:42" (1/1) ... [2023-11-19 04:51:42,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@783cf664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:42, skipping insertion in model container [2023-11-19 04:51:42,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:42" (1/1) ... [2023-11-19 04:51:43,094 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:51:44,402 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_511dfe54-2833-4713-81ac-74d3fc749a0c/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] [2023-11-19 04:51:44,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:51:44,477 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:51:44,598 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [3278] [2023-11-19 04:51:44,600 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3281] [2023-11-19 04:51:44,600 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3284] [2023-11-19 04:51:44,601 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3287] [2023-11-19 04:51:44,606 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] [2023-11-19 04:51:44,708 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_511dfe54-2833-4713-81ac-74d3fc749a0c/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] [2023-11-19 04:51:44,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:51:44,775 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:51:44,776 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:51:44,784 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:51:44,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44 WrapperNode [2023-11-19 04:51:44,785 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:51:44,786 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:51:44,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:51:44,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:51:44,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:44,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:44,998 INFO L138 Inliner]: procedures = 142, calls = 672, calls flagged for inlining = 62, calls inlined = 59, statements flattened = 2173 [2023-11-19 04:51:44,999 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:51:45,000 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:51:45,000 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:51:45,000 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:51:45,011 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,184 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,226 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:51:45,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:51:45,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:51:45,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:51:45,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (1/1) ... [2023-11-19 04:51:45,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:51:45,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:45,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:51:45,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_511dfe54-2833-4713-81ac-74d3fc749a0c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:51:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-19 04:51:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-19 04:51:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:51:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2023-11-19 04:51:45,341 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2023-11-19 04:51:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 04:51:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 04:51:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 04:51:45,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 04:51:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:51:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 04:51:45,343 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 04:51:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2023-11-19 04:51:45,343 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2023-11-19 04:51:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure retry_transmit [2023-11-19 04:51:45,344 INFO L138 BoogieDeclarations]: Found implementation of procedure retry_transmit [2023-11-19 04:51:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-19 04:51:45,344 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-19 04:51:45,345 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-19 04:51:45,345 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-19 04:51:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-19 04:51:45,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-19 04:51:45,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:51:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:51:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_close [2023-11-19 04:51:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_close [2023-11-19 04:51:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure remove_msg [2023-11-19 04:51:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_msg [2023-11-19 04:51:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2023-11-19 04:51:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2023-11-19 04:51:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure task_pid [2023-11-19 04:51:45,351 INFO L138 BoogieDeclarations]: Found implementation of procedure task_pid [2023-11-19 04:51:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 04:51:45,351 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 04:51:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unlock [2023-11-19 04:51:45,352 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unlock [2023-11-19 04:51:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:51:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2023-11-19 04:51:45,352 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2023-11-19 04:51:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:51:45,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:51:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 04:51:45,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 04:51:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:51:45,353 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:51:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure add_msg [2023-11-19 04:51:45,353 INFO L138 BoogieDeclarations]: Found implementation of procedure add_msg [2023-11-19 04:51:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:51:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2023-11-19 04:51:45,354 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2023-11-19 04:51:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-19 04:51:45,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-19 04:51:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-19 04:51:45,355 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-19 04:51:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_poll [2023-11-19 04:51:45,355 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_poll [2023-11-19 04:51:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:51:45,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2023-11-19 04:51:45,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2023-11-19 04:51:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:51:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:51:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-19 04:51:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-19 04:51:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure findClient [2023-11-19 04:51:45,358 INFO L138 BoogieDeclarations]: Found implementation of procedure findClient [2023-11-19 04:51:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure put_char [2023-11-19 04:51:45,359 INFO L138 BoogieDeclarations]: Found implementation of procedure put_char [2023-11-19 04:51:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:51:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-19 04:51:45,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-19 04:51:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure put_pid [2023-11-19 04:51:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure put_pid [2023-11-19 04:51:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2023-11-19 04:51:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2023-11-19 04:51:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure remove_client_block [2023-11-19 04:51:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_client_block [2023-11-19 04:51:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 04:51:45,361 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 04:51:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:51:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:51:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure on_receive_block [2023-11-19 04:51:45,363 INFO L138 BoogieDeclarations]: Found implementation of procedure on_receive_block [2023-11-19 04:51:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:51:45,363 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:51:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure flush [2023-11-19 04:51:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure flush [2023-11-19 04:51:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_set_termios [2023-11-19 04:51:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_set_termios [2023-11-19 04:51:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-19 04:51:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-19 04:51:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_ioctl [2023-11-19 04:51:45,365 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_ioctl [2023-11-19 04:51:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure remove_from_tx_queue [2023-11-19 04:51:45,365 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_from_tx_queue [2023-11-19 04:51:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:51:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure tty_lock [2023-11-19 04:51:45,365 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_lock [2023-11-19 04:51:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure trigger_transmit [2023-11-19 04:51:45,366 INFO L138 BoogieDeclarations]: Found implementation of procedure trigger_transmit [2023-11-19 04:51:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 04:51:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:51:45,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:51:45,824 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:51:45,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:51:46,125 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 04:51:50,190 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:51:51,082 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:51:51,082 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:51:51,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:51 BoogieIcfgContainer [2023-11-19 04:51:51,098 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:51:51,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:51:51,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:51:51,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:51:51,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:51:42" (1/3) ... [2023-11-19 04:51:51,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4a8bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:51, skipping insertion in model container [2023-11-19 04:51:51,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:44" (2/3) ... [2023-11-19 04:51:51,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4a8bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:51, skipping insertion in model container [2023-11-19 04:51:51,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:51" (3/3) ... [2023-11-19 04:51:51,111 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i [2023-11-19 04:51:51,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:51:51,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:51:51,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:51:51,226 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;@471ef40a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:51:51,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:51:51,236 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) [2023-11-19 04:51:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-19 04:51:51,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:51,279 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] [2023-11-19 04:51:51,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:51,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1433673860, now seen corresponding path program 1 times [2023-11-19 04:51:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:51,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312536153] [2023-11-19 04:51:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:51,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-19 04:51:52,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:52,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312536153] [2023-11-19 04:51:52,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312536153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:52,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:52,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:51:52,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685781374] [2023-11-19 04:51:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:52,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:52,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:51:52,178 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) [2023-11-19 04:51:55,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:51:57,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:51:59,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:51:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:59,886 INFO L93 Difference]: Finished difference Result 1439 states and 2154 transitions. [2023-11-19 04:51:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:59,889 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 [2023-11-19 04:51:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:59,913 INFO L225 Difference]: With dead ends: 1439 [2023-11-19 04:51:59,913 INFO L226 Difference]: Without dead ends: 838 [2023-11-19 04:51:59,926 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 [2023-11-19 04:51:59,929 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 385 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:59,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1556 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2023-11-19 04:51:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-11-19 04:52:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 835. [2023-11-19 04:52:00,100 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) [2023-11-19 04:52:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1215 transitions. [2023-11-19 04:52:00,114 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1215 transitions. Word has length 135 [2023-11-19 04:52:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:00,118 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1215 transitions. [2023-11-19 04:52:00,119 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) [2023-11-19 04:52:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1215 transitions. [2023-11-19 04:52:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-19 04:52:00,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:00,129 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] [2023-11-19 04:52:00,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:52:00,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:00,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1793628480, now seen corresponding path program 1 times [2023-11-19 04:52:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:00,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000913684] [2023-11-19 04:52:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:00,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-19 04:52:00,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000913684] [2023-11-19 04:52:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000913684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:00,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:00,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:52:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002156993] [2023-11-19 04:52:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:00,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:00,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:00,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:00,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:00,663 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) [2023-11-19 04:52:05,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:08,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:10,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:12,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:14,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:16,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:18,508 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 [] [2023-11-19 04:52:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:18,587 INFO L93 Difference]: Finished difference Result 3206 states and 4749 transitions. [2023-11-19 04:52:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:52:18,588 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 [2023-11-19 04:52:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:18,617 INFO L225 Difference]: With dead ends: 3206 [2023-11-19 04:52:18,617 INFO L226 Difference]: Without dead ends: 2413 [2023-11-19 04:52:18,622 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 [2023-11-19 04:52:18,624 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 2189 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 340 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2189 SdHoareTripleChecker+Valid, 2023 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:18,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2189 Valid, 2023 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 691 Invalid, 6 Unknown, 0 Unchecked, 17.6s Time] [2023-11-19 04:52:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2023-11-19 04:52:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2397. [2023-11-19 04:52:18,828 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) [2023-11-19 04:52:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3565 transitions. [2023-11-19 04:52:18,852 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3565 transitions. Word has length 146 [2023-11-19 04:52:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:18,855 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 3565 transitions. [2023-11-19 04:52:18,855 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) [2023-11-19 04:52:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3565 transitions. [2023-11-19 04:52:18,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-19 04:52:18,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:18,859 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] [2023-11-19 04:52:18,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:52:18,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:18,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash 574492228, now seen corresponding path program 1 times [2023-11-19 04:52:18,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:18,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198267907] [2023-11-19 04:52:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:18,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-19 04:52:19,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:19,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198267907] [2023-11-19 04:52:19,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198267907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:19,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:19,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:52:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681355257] [2023-11-19 04:52:19,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:19,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:19,246 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) [2023-11-19 04:52:22,716 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 [] [2023-11-19 04:52:24,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:27,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:31,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:33,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:35,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:37,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:39,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:41,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:52:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:41,669 INFO L93 Difference]: Finished difference Result 9446 states and 14385 transitions. [2023-11-19 04:52:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:52:41,670 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 147 [2023-11-19 04:52:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:41,741 INFO L225 Difference]: With dead ends: 9446 [2023-11-19 04:52:41,741 INFO L226 Difference]: Without dead ends: 7091 [2023-11-19 04:52:41,754 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 [2023-11-19 04:52:41,755 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 1709 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 6 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:41,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 2653 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 802 Invalid, 9 Unknown, 0 Unchecked, 21.9s Time] [2023-11-19 04:52:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7091 states.