./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.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_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/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_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/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_a2fc860a-ce72-4d95-b678-f2bec27e83a6/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 f2c7848ca043d8b9ca4f9ab4b1ce08f583c2bd8d8967a557df683af547558d91 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:19:06,177 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:19:06,314 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:19:06,323 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:19:06,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:19:06,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:19:06,368 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:19:06,368 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:19:06,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:19:06,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:19:06,375 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:19:06,376 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:19:06,377 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:19:06,379 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:19:06,379 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:19:06,380 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:19:06,380 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:19:06,381 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:19:06,381 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:19:06,382 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:19:06,382 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:19:06,383 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:19:06,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:19:06,384 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:19:06,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:19:06,385 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:19:06,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:19:06,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:19:06,387 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:19:06,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:19:06,388 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:19:06,389 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:19:06,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:19:06,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:19:06,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:06,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:19:06,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:19:06,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:19:06,402 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:19:06,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:19:06,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:19:06,403 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:19:06,403 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:19:06,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:19:06,404 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_a2fc860a-ce72-4d95-b678-f2bec27e83a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2c7848ca043d8b9ca4f9ab4b1ce08f583c2bd8d8967a557df683af547558d91 [2023-11-23 21:19:06,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:19:06,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:19:06,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:19:06,726 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:19:06,726 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:19:06,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i [2023-11-23 21:19:09,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:19:10,458 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:19:10,459 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i [2023-11-23 21:19:10,513 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/data/02d7698a2/0d1a173fd34e4f6189dcee205c0f03a5/FLAGd6ee8cf60 [2023-11-23 21:19:10,532 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/data/02d7698a2/0d1a173fd34e4f6189dcee205c0f03a5 [2023-11-23 21:19:10,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:19:10,540 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:19:10,543 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:10,543 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:19:10,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:19:10,550 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:10" (1/1) ... [2023-11-23 21:19:10,551 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f7866d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:10, skipping insertion in model container [2023-11-23 21:19:10,551 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:10" (1/1) ... [2023-11-23 21:19:10,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:19:11,342 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3602] [2023-11-23 21:19:11,343 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3603-3604] [2023-11-23 21:19:11,675 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_a2fc860a-ce72-4d95-b678-f2bec27e83a6/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i[110145,110158] [2023-11-23 21:19:12,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:13,079 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:19:13,184 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3602] [2023-11-23 21:19:13,184 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3603-3604] [2023-11-23 21:19:13,188 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "m" (__preempt_count)); [3705] [2023-11-23 21:19:13,190 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [3708] [2023-11-23 21:19:13,190 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [3711] [2023-11-23 21:19:13,191 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [3714] [2023-11-23 21:19:13,193 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outw %w0, %w1": : "a" (value), "Nd" (port)); [3768] [2023-11-23 21:19:13,194 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inw %w1, %w0": "=a" (value): "Nd" (port)); [3776] [2023-11-23 21:19:13,194 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; outsw": "+S" (addr), "+c" (count): "d" (port)); [3783] [2023-11-23 21:19:13,195 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; insw": "+D" (addr), "+c" (count): "d" (port)); [3790] [2023-11-23 21:19:13,198 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_a2fc860a-ce72-4d95-b678-f2bec27e83a6/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i[110145,110158] [2023-11-23 21:19:13,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:13,549 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:19:13,558 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:19:13,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13 WrapperNode [2023-11-23 21:19:13,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:13,560 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:13,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:19:13,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:19:13,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:13,632 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:13,852 INFO L138 Inliner]: procedures = 199, calls = 1545, calls flagged for inlining = 95, calls inlined = 93, statements flattened = 4386 [2023-11-23 21:19:13,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:13,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:19:13,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:19:13,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:19:13,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:13,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:13,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:13,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:14,145 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:14,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:14,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:14,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:14,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:19:14,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:19:14,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:19:14,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:19:14,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (1/1) ... [2023-11-23 21:19:14,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:14,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:14,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:19:14,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:19:14,363 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_start [2023-11-23 21:19:14,363 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_start [2023-11-23 21:19:14,364 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_set_termios [2023-11-23 21:19:14,364 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_set_termios [2023-11-23 21:19:14,364 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-11-23 21:19:14,364 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-11-23 21:19:14,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:19:14,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:19:14,365 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:19:14,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:19:14,366 INFO L130 BoogieDeclarations]: Found specification of procedure tty_kref_put [2023-11-23 21:19:14,366 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_kref_put [2023-11-23 21:19:14,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-23 21:19:14,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-23 21:19:14,368 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_tiocmset [2023-11-23 21:19:14,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_tiocmset [2023-11-23 21:19:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_3 [2023-11-23 21:19:14,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_3 [2023-11-23 21:19:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:19:14,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:19:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_region [2023-11-23 21:19:14,372 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_region [2023-11-23 21:19:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure char_buf_ptr [2023-11-23 21:19:14,372 INFO L138 BoogieDeclarations]: Found implementation of procedure char_buf_ptr [2023-11-23 21:19:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure raise_dtr [2023-11-23 21:19:14,373 INFO L138 BoogieDeclarations]: Found implementation of procedure raise_dtr [2023-11-23 21:19:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure tty_flip_buffer_push [2023-11-23 21:19:14,374 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_flip_buffer_push [2023-11-23 21:19:14,374 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_chars_in_buffer [2023-11-23 21:19:14,374 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_chars_in_buffer [2023-11-23 21:19:14,374 INFO L130 BoogieDeclarations]: Found specification of procedure tty_insert_flip_char [2023-11-23 21:19:14,374 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_insert_flip_char [2023-11-23 21:19:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2023-11-23 21:19:14,375 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2023-11-23 21:19:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_flush_buffer [2023-11-23 21:19:14,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_flush_buffer [2023-11-23 21:19:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:19:14,376 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:19:14,376 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:19:14,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:19:14,376 INFO L130 BoogieDeclarations]: Found specification of procedure outsw [2023-11-23 21:19:14,376 INFO L138 BoogieDeclarations]: Found implementation of procedure outsw [2023-11-23 21:19:14,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:19:14,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:19:14,377 INFO L130 BoogieDeclarations]: Found specification of procedure insw [2023-11-23 21:19:14,377 INFO L138 BoogieDeclarations]: Found implementation of procedure insw [2023-11-23 21:19:14,377 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_put_char [2023-11-23 21:19:14,377 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_put_char [2023-11-23 21:19:14,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:19:14,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:19:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2023-11-23 21:19:14,380 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2023-11-23 21:19:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_write_room [2023-11-23 21:19:14,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_write_room [2023-11-23 21:19:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_ioctl [2023-11-23 21:19:14,381 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_ioctl [2023-11-23 21:19:14,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-23 21:19:14,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-23 21:19:14,381 INFO L130 BoogieDeclarations]: Found specification of procedure drop_dtr [2023-11-23 21:19:14,382 INFO L138 BoogieDeclarations]: Found implementation of procedure drop_dtr [2023-11-23 21:19:14,382 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:19:14,382 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:19:14,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:19:14,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:19:14,383 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 21:19:14,383 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 21:19:14,383 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:19:14,383 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:19:14,384 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:19:14,384 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:19:14,384 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2023-11-23 21:19:14,384 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2023-11-23 21:19:14,384 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2023-11-23 21:19:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2023-11-23 21:19:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-23 21:19:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-23 21:19:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_get [2023-11-23 21:19:14,386 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_get [2023-11-23 21:19:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-23 21:19:14,386 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-23 21:19:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:19:14,387 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_dtr_rts [2023-11-23 21:19:14,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_dtr_rts [2023-11-23 21:19:14,387 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:19:14,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:19:14,387 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 21:19:14,388 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 21:19:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_config_port [2023-11-23 21:19:14,388 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_config_port [2023-11-23 21:19:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:19:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-23 21:19:14,389 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-23 21:19:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:19:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_tiocmget [2023-11-23 21:19:14,389 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_tiocmget [2023-11-23 21:19:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_unthrottle [2023-11-23 21:19:14,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_unthrottle [2023-11-23 21:19:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure lock_card [2023-11-23 21:19:14,391 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_card [2023-11-23 21:19:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_flush_chars [2023-11-23 21:19:14,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_flush_chars [2023-11-23 21:19:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:19:14,391 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:19:14,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:19:14,392 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2023-11-23 21:19:14,393 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2023-11-23 21:19:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 21:19:14,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 21:19:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2023-11-23 21:19:14,393 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2023-11-23 21:19:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_pr_debug [2023-11-23 21:19:14,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_pr_debug [2023-11-23 21:19:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:19:14,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:19:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_carrier_raised [2023-11-23 21:19:14,395 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_carrier_raised [2023-11-23 21:19:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:19:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_hangup [2023-11-23 21:19:14,395 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_hangup [2023-11-23 21:19:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_throttle [2023-11-23 21:19:14,395 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_throttle [2023-11-23 21:19:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:19:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2023-11-23 21:19:14,396 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2023-11-23 21:19:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-23 21:19:14,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-23 21:19:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:19:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-23 21:19:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-11-23 21:19:14,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-11-23 21:19:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2023-11-23 21:19:14,398 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2023-11-23 21:19:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2023-11-23 21:19:14,399 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2023-11-23 21:19:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_card [2023-11-23 21:19:14,402 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_card [2023-11-23 21:19:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-23 21:19:14,402 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-23 21:19:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_send_break [2023-11-23 21:19:14,402 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_send_break [2023-11-23 21:19:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:19:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2023-11-23 21:19:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2023-11-23 21:19:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure WaitTillCardIsFree [2023-11-23 21:19:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure WaitTillCardIsFree [2023-11-23 21:19:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:19:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:19:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2023-11-23 21:19:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2023-11-23 21:19:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:19:14,404 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:19:15,035 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:19:15,039 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:19:15,844 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:19:22,069 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:19:24,735 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:19:24,736 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:19:24,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:24 BoogieIcfgContainer [2023-11-23 21:19:24,738 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:19:24,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:19:24,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:19:24,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:19:24,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:10" (1/3) ... [2023-11-23 21:19:24,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c51b615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:24, skipping insertion in model container [2023-11-23 21:19:24,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:13" (2/3) ... [2023-11-23 21:19:24,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c51b615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:24, skipping insertion in model container [2023-11-23 21:19:24,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:24" (3/3) ... [2023-11-23 21:19:24,749 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i [2023-11-23 21:19:24,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:19:24,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:19:24,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:19:24,908 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;@7fba4a22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:19:24,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:19:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 1126 states, 701 states have (on average 1.405135520684736) internal successors, (985), 732 states have internal predecessors, (985), 358 states have call successors, (358), 67 states have call predecessors, (358), 66 states have return successors, (350), 348 states have call predecessors, (350), 350 states have call successors, (350) [2023-11-23 21:19:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-23 21:19:24,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:24,979 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:24,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:24,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:24,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1182919129, now seen corresponding path program 1 times [2023-11-23 21:19:24,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:24,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80897600] [2023-11-23 21:19:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:24,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 21:19:26,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:26,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80897600] [2023-11-23 21:19:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80897600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:26,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:26,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:26,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232380350] [2023-11-23 21:19:26,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:26,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:26,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:26,090 INFO L87 Difference]: Start difference. First operand has 1126 states, 701 states have (on average 1.405135520684736) internal successors, (985), 732 states have internal predecessors, (985), 358 states have call successors, (358), 67 states have call predecessors, (358), 66 states have return successors, (350), 348 states have call predecessors, (350), 350 states have call successors, (350) Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 21:19:28,943 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 21:19:31,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:19:33,958 WARN L539 Checker$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 21:19:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:34,703 INFO L93 Difference]: Finished difference Result 3134 states and 4776 transitions. [2023-11-23 21:19:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 151 [2023-11-23 21:19:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:34,751 INFO L225 Difference]: With dead ends: 3134 [2023-11-23 21:19:34,751 INFO L226 Difference]: Without dead ends: 1988 [2023-11-23 21:19:34,775 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 21:19:34,778 INFO L413 NwaCegarLoop]: 1509 mSDtfsCounter, 1342 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:34,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1342 Valid, 3000 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 354 Invalid, 3 Unknown, 0 Unchecked, 8.3s Time] [2023-11-23 21:19:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2023-11-23 21:19:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1988. [2023-11-23 21:19:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1259 states have (on average 1.3971405877680698) internal successors, (1759), 1299 states have internal predecessors, (1759), 608 states have call successors, (608), 121 states have call predecessors, (608), 120 states have return successors, (607), 603 states have call predecessors, (607), 607 states have call successors, (607) [2023-11-23 21:19:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2974 transitions. [2023-11-23 21:19:35,097 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2974 transitions. Word has length 151 [2023-11-23 21:19:35,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:35,098 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2974 transitions. [2023-11-23 21:19:35,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 21:19:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2974 transitions. [2023-11-23 21:19:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-23 21:19:35,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:35,127 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:35,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:19:35,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:35,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash -374511688, now seen corresponding path program 1 times [2023-11-23 21:19:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:35,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525885064] [2023-11-23 21:19:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-11-23 21:19:35,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:35,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525885064] [2023-11-23 21:19:35,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525885064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:35,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:35,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:35,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950029094] [2023-11-23 21:19:35,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:35,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:35,730 INFO L87 Difference]: Start difference. First operand 1988 states and 2974 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-23 21:19:38,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:19:40,413 WARN L539 Checker$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 21:19:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:41,541 INFO L93 Difference]: Finished difference Result 3963 states and 5932 transitions. [2023-11-23 21:19:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 203 [2023-11-23 21:19:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:41,565 INFO L225 Difference]: With dead ends: 3963 [2023-11-23 21:19:41,565 INFO L226 Difference]: Without dead ends: 1992 [2023-11-23 21:19:41,577 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 21:19:41,578 INFO L413 NwaCegarLoop]: 1485 mSDtfsCounter, 2 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2967 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:41,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2967 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 348 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2023-11-23 21:19:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2023-11-23 21:19:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1990. [2023-11-23 21:19:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1261 states have (on average 1.3965107057890562) internal successors, (1761), 1301 states have internal predecessors, (1761), 608 states have call successors, (608), 121 states have call predecessors, (608), 120 states have return successors, (607), 603 states have call predecessors, (607), 607 states have call successors, (607) [2023-11-23 21:19:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 2976 transitions. [2023-11-23 21:19:41,841 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 2976 transitions. Word has length 203 [2023-11-23 21:19:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:41,842 INFO L495 AbstractCegarLoop]: Abstraction has 1990 states and 2976 transitions. [2023-11-23 21:19:41,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-23 21:19:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 2976 transitions. [2023-11-23 21:19:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-23 21:19:41,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:41,865 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:41,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:19:41,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:41,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:41,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1014029657, now seen corresponding path program 1 times [2023-11-23 21:19:41,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:41,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673427447] [2023-11-23 21:19:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-11-23 21:19:42,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:42,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673427447] [2023-11-23 21:19:42,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673427447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:42,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:42,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:42,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856347021] [2023-11-23 21:19:42,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:42,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:42,505 INFO L87 Difference]: Start difference. First operand 1990 states and 2976 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-23 21:19:45,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:19:47,266 WARN L539 Checker$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 21:19:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:48,157 INFO L93 Difference]: Finished difference Result 3965 states and 5932 transitions. [2023-11-23 21:19:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:48,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 205 [2023-11-23 21:19:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:48,178 INFO L225 Difference]: With dead ends: 3965 [2023-11-23 21:19:48,179 INFO L226 Difference]: Without dead ends: 1992 [2023-11-23 21:19:48,190 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 21:19:48,194 INFO L413 NwaCegarLoop]: 1486 mSDtfsCounter, 0 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2969 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:48,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2969 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 346 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2023-11-23 21:19:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2023-11-23 21:19:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1992. [2023-11-23 21:19:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1263 states have (on average 1.395882818685669) internal successors, (1763), 1303 states have internal predecessors, (1763), 608 states have call successors, (608), 121 states have call predecessors, (608), 120 states have return successors, (607), 603 states have call predecessors, (607), 607 states have call successors, (607) [2023-11-23 21:19:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2978 transitions. [2023-11-23 21:19:48,329 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2978 transitions. Word has length 205 [2023-11-23 21:19:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:48,331 INFO L495 AbstractCegarLoop]: Abstraction has 1992 states and 2978 transitions. [2023-11-23 21:19:48,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-23 21:19:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2978 transitions. [2023-11-23 21:19:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-23 21:19:48,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:48,350 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:48,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:19:48,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:48,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1639655620, now seen corresponding path program 1 times [2023-11-23 21:19:48,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:48,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040624641] [2023-11-23 21:19:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:48,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-11-23 21:19:49,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040624641] [2023-11-23 21:19:49,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040624641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:49,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628485583] [2023-11-23 21:19:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:49,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:49,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:49,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:49,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2fc860a-ce72-4d95-b678-f2bec27e83a6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:19:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:50,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 2710 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:19:50,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 69 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-23 21:19:50,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:19:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-11-23 21:19:50,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628485583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:19:50,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203994212] [2023-11-23 21:19:50,379 INFO L159 IcfgInterpreter]: Started Sifa with 136 locations of interest [2023-11-23 21:19:50,380 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:19:50,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:19:50,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:19:50,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs