./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.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_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/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_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/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_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/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 c3c8f5f42e93f38ff45b5fb218b90423c4fa8214795cc0db5e91266a2717c97b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:22,003 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:22,091 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:12:22,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:22,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:22,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:22,132 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:22,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:22,134 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:22,135 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:22,135 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:22,136 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:22,137 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:22,137 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:12:22,138 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:22,139 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:22,139 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:12:22,140 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:12:22,141 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:22,141 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:12:22,142 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:12:22,143 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:12:22,144 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:22,145 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:12:22,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:12:22,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:22,178 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:12:22,178 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:22,179 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:12:22,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:12:22,180 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:22,181 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:22,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:22,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:22,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:22,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:22,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:22,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:12:22,184 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:12:22,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:12:22,184 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:22,185 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:12:22,185 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:22,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:22,186 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_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3c8f5f42e93f38ff45b5fb218b90423c4fa8214795cc0db5e91266a2717c97b [2023-11-23 21:12:22,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:22,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:22,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:22,606 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:22,606 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:22,608 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i [2023-11-23 21:12:25,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:26,415 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:26,416 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i [2023-11-23 21:12:26,462 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/data/3fcde943a/d253264e9ac143409c8441badc1fea97/FLAG8dcceade9 [2023-11-23 21:12:26,817 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/data/3fcde943a/d253264e9ac143409c8441badc1fea97 [2023-11-23 21:12:26,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:26,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:26,823 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:26,823 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:26,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:26,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:26" (1/1) ... [2023-11-23 21:12:26,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f953670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:26, skipping insertion in model container [2023-11-23 21:12:26,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:26" (1/1) ... [2023-11-23 21:12:26,967 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:27,965 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_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i[98402,98415] [2023-11-23 21:12:29,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:29,069 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:29,154 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [3258] [2023-11-23 21:12:29,156 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapl %0": "=r" (val): "0" (val)); [3265] [2023-11-23 21:12:29,157 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapq %0": "=r" (val): "0" (val)); [3272] [2023-11-23 21:12:29,158 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [3305] [2023-11-23 21:12:29,159 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3308] [2023-11-23 21:12:29,159 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3311] [2023-11-23 21:12:29,160 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3314] [2023-11-23 21:12:29,167 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_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i[98402,98415] [2023-11-23 21:12:29,200 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [4083] [2023-11-23 21:12:29,200 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [4087] [2023-11-23 21:12:29,202 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgb %0,%1": "=q" (__x), "+m" (*__ptr): "0" (__x): "memory"); [4110] [2023-11-23 21:12:29,203 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgw %0,%1": "=r" (__x), "+m" (*__ptr___0): "0" (__x): "memory"); [4115] [2023-11-23 21:12:29,203 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgl %0,%1": "=r" (__x), "+m" (*__ptr___1): "0" (__x): "memory"); [4120] [2023-11-23 21:12:29,203 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgq %0,%1": "=r" (__x), "+m" (*__ptr___2): "0" (__x): "memory"); [4125] [2023-11-23 21:12:29,234 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [4584] [2023-11-23 21:12:29,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:29,515 WARN L675 CHandler]: The function __xchg_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:12:29,515 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:12:29,522 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:29,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29 WrapperNode [2023-11-23 21:12:29,524 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:29,525 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:29,525 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:29,525 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:29,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:29,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:29,837 INFO L138 Inliner]: procedures = 256, calls = 2522, calls flagged for inlining = 117, calls inlined = 96, statements flattened = 4208 [2023-11-23 21:12:29,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:29,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:29,838 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:29,838 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:29,848 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:29,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:29,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:29,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:29,996 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:30,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:30,062 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:30,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:30,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:30,107 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:30,107 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:30,107 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:30,108 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (1/1) ... [2023-11-23 21:12:30,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:30,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:30,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:30,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9a8cf89-c08c-4b7e-b3d7-7b1e272f7b49/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-23 21:12:30,186 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-23 21:12:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-11-23 21:12:30,187 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-11-23 21:12:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-23 21:12:30,187 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-23 21:12:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2023-11-23 21:12:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:12:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:12:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:12:30,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:12:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2023-11-23 21:12:30,188 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2023-11-23 21:12:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-23 21:12:30,189 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-23 21:12:30,190 INFO L130 BoogieDeclarations]: Found specification of procedure usb_make_path [2023-11-23 21:12:30,191 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_make_path [2023-11-23 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:12:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure send_packet [2023-11-23 21:12:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure send_packet [2023-11-23 21:12:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure dev_printk [2023-11-23 21:12:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_printk [2023-11-23 21:12:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2023-11-23 21:12:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2023-11-23 21:12:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:12:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:12:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:12:30,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:12:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure imon_disconnect [2023-11-23 21:12:30,194 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_disconnect [2023-11-23 21:12:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2023-11-23 21:12:30,194 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2023-11-23 21:12:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_imon_context [2023-11-23 21:12:30,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_imon_context [2023-11-23 21:12:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:12:30,195 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:12:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 21:12:30,195 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 21:12:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:12:30,196 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:12:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_driver_lock [2023-11-23 21:12:30,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_driver_lock [2023-11-23 21:12:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:12:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2023-11-23 21:12:30,197 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2023-11-23 21:12:30,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:12:30,198 INFO L130 BoogieDeclarations]: Found specification of procedure input_allocate_device [2023-11-23 21:12:30,198 INFO L138 BoogieDeclarations]: Found implementation of procedure input_allocate_device [2023-11-23 21:12:30,198 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2023-11-23 21:12:30,198 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2023-11-23 21:12:30,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:12:30,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:12:30,199 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:12:30,199 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:12:30,199 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:12:30,199 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:12:30,199 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:12:30,200 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:12:30,200 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 21:12:30,200 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 21:12:30,200 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-23 21:12:30,200 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-23 21:12:30,200 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_drvdata [2023-11-23 21:12:30,201 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_drvdata [2023-11-23 21:12:30,201 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2023-11-23 21:12:30,201 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2023-11-23 21:12:30,201 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-23 21:12:30,201 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-23 21:12:30,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:12:30,202 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:12:30,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:12:30,202 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 21:12:30,202 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 21:12:30,202 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2023-11-23 21:12:30,202 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2023-11-23 21:12:30,203 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-11-23 21:12:30,203 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-11-23 21:12:30,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:12:30,203 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-23 21:12:30,203 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-23 21:12:30,203 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_device [2023-11-23 21:12:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_device [2023-11-23 21:12:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_group [2023-11-23 21:12:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_group [2023-11-23 21:12:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:12:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2023-11-23 21:12:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2023-11-23 21:12:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2023-11-23 21:12:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2023-11-23 21:12:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:12:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:12:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure lcd_write [2023-11-23 21:12:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure lcd_write [2023-11-23 21:12:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 21:12:30,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 21:12:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-23 21:12:30,206 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-23 21:12:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2023-11-23 21:12:30,206 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2023-11-23 21:12:30,207 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:12:30,207 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:12:30,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:12:30,207 INFO L130 BoogieDeclarations]: Found specification of procedure usb_to_input_id [2023-11-23 21:12:30,207 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_to_input_id [2023-11-23 21:12:30,207 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2023-11-23 21:12:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2023-11-23 21:12:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure noop_llseek [2023-11-23 21:12:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure noop_llseek [2023-11-23 21:12:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:12:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:12:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure free_imon_context [2023-11-23 21:12:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure free_imon_context [2023-11-23 21:12:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:12:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2023-11-23 21:12:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2023-11-23 21:12:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure input_register_device [2023-11-23 21:12:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure input_register_device [2023-11-23 21:12:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_imon_context [2023-11-23 21:12:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_imon_context [2023-11-23 21:12:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-11-23 21:12:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-11-23 21:12:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure vfd_write [2023-11-23 21:12:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure vfd_write [2023-11-23 21:12:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:12:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2023-11-23 21:12:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2023-11-23 21:12:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-23 21:12:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2023-11-23 21:12:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2023-11-23 21:12:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure display_close [2023-11-23 21:12:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure display_close [2023-11-23 21:12:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_dev [2023-11-23 21:12:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_dev [2023-11-23 21:12:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-23 21:12:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-23 21:12:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_driver_lock [2023-11-23 21:12:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_driver_lock [2023-11-23 21:12:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2023-11-23 21:12:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2023-11-23 21:12:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure imon_find_endpoints [2023-11-23 21:12:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_find_endpoints [2023-11-23 21:12:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure display_open [2023-11-23 21:12:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure display_open [2023-11-23 21:12:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-23 21:12:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-23 21:12:30,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:12:30,215 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-23 21:12:30,215 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-23 21:12:30,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:30,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:30,726 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:30,730 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:31,340 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:12:37,999 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:12:39,008 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:12:39,009 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 21:12:39,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:39 BoogieIcfgContainer [2023-11-23 21:12:39,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:12:39,017 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:12:39,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:12:39,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:12:39,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:26" (1/3) ... [2023-11-23 21:12:39,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b85f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:39, skipping insertion in model container [2023-11-23 21:12:39,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:29" (2/3) ... [2023-11-23 21:12:39,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b85f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:39, skipping insertion in model container [2023-11-23 21:12:39,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:39" (3/3) ... [2023-11-23 21:12:39,026 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point.cil.out.i [2023-11-23 21:12:39,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:12:39,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:12:39,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:12:39,174 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;@29c6092c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:12:39,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:12:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 1082 states, 663 states have (on average 1.3363499245852186) internal successors, (886), 685 states have internal predecessors, (886), 351 states have call successors, (351), 67 states have call predecessors, (351), 66 states have return successors, (344), 343 states have call predecessors, (344), 344 states have call successors, (344) [2023-11-23 21:12:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:12:39,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:39,218 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:39,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:39,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1707492176, now seen corresponding path program 1 times [2023-11-23 21:12:39,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:39,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468105801] [2023-11-23 21:12:39,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:39,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-23 21:12:40,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:40,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468105801] [2023-11-23 21:12:40,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468105801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:40,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:40,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:40,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102342458] [2023-11-23 21:12:40,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:40,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:40,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:40,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:40,183 INFO L87 Difference]: Start difference. First operand has 1082 states, 663 states have (on average 1.3363499245852186) internal successors, (886), 685 states have internal predecessors, (886), 351 states have call successors, (351), 67 states have call predecessors, (351), 66 states have return successors, (344), 343 states have call predecessors, (344), 344 states have call successors, (344) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:12:42,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:44,991 INFO L93 Difference]: Finished difference Result 3130 states and 4664 transitions. [2023-11-23 21:12:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:44,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 69 [2023-11-23 21:12:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:45,041 INFO L225 Difference]: With dead ends: 3130 [2023-11-23 21:12:45,042 INFO L226 Difference]: Without dead ends: 2049 [2023-11-23 21:12:45,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:45,062 INFO L413 NwaCegarLoop]: 1446 mSDtfsCounter, 1449 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 2850 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:45,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1449 Valid, 2850 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-23 21:12:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2023-11-23 21:12:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2035. [2023-11-23 21:12:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1256 states have (on average 1.320063694267516) internal successors, (1658), 1277 states have internal predecessors, (1658), 649 states have call successors, (649), 130 states have call predecessors, (649), 129 states have return successors, (642), 639 states have call predecessors, (642), 642 states have call successors, (642) [2023-11-23 21:12:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 2949 transitions. [2023-11-23 21:12:45,364 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 2949 transitions. Word has length 69 [2023-11-23 21:12:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:45,365 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 2949 transitions. [2023-11-23 21:12:45,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:12:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 2949 transitions. [2023-11-23 21:12:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:12:45,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:45,376 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:45,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:45,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:45,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1571771120, now seen corresponding path program 1 times [2023-11-23 21:12:45,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:45,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108912573] [2023-11-23 21:12:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:45,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-23 21:12:45,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108912573] [2023-11-23 21:12:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108912573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:45,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914645704] [2023-11-23 21:12:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:45,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:45,874 INFO L87 Difference]: Start difference. First operand 2035 states and 2949 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:12:47,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:49,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:50,563 INFO L93 Difference]: Finished difference Result 4984 states and 7197 transitions. [2023-11-23 21:12:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:50,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 70 [2023-11-23 21:12:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:50,590 INFO L225 Difference]: With dead ends: 4984 [2023-11-23 21:12:50,590 INFO L226 Difference]: Without dead ends: 2969 [2023-11-23 21:12:50,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:50,601 INFO L413 NwaCegarLoop]: 1497 mSDtfsCounter, 752 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:50,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 2887 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-23 21:12:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2023-11-23 21:12:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 2956. [2023-11-23 21:12:50,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 1847 states have (on average 1.329182458040065) internal successors, (2455), 1868 states have internal predecessors, (2455), 907 states have call successors, (907), 202 states have call predecessors, (907), 201 states have return successors, (900), 897 states have call predecessors, (900), 900 states have call successors, (900) [2023-11-23 21:12:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 4262 transitions. [2023-11-23 21:12:50,874 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 4262 transitions. Word has length 70 [2023-11-23 21:12:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:50,875 INFO L495 AbstractCegarLoop]: Abstraction has 2956 states and 4262 transitions. [2023-11-23 21:12:50,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:12:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 4262 transitions. [2023-11-23 21:12:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:12:50,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:50,877 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:50,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:12:50,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:50,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash 507457987, now seen corresponding path program 1 times [2023-11-23 21:12:50,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:50,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517070179] [2023-11-23 21:12:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:50,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-23 21:12:51,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:51,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517070179] [2023-11-23 21:12:51,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517070179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:51,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:51,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457823921] [2023-11-23 21:12:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:51,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:51,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:51,469 INFO L87 Difference]: Start difference. First operand 2956 states and 4262 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:12:55,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:12:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:56,906 INFO L93 Difference]: Finished difference Result 8766 states and 12636 transitions. [2023-11-23 21:12:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:56,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 68 [2023-11-23 21:12:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:56,956 INFO L225 Difference]: With dead ends: 8766 [2023-11-23 21:12:56,956 INFO L226 Difference]: Without dead ends: 5836 [2023-11-23 21:12:56,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:56,973 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1480 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:56,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 2956 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-11-23 21:12:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2023-11-23 21:12:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 5828. [2023-11-23 21:12:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5828 states, 3647 states have (on average 1.327392377296408) internal successors, (4841), 3682 states have internal predecessors, (4841), 1779 states have call successors, (1779), 402 states have call predecessors, (1779), 401 states have return successors, (1772), 1767 states have call predecessors, (1772), 1772 states have call successors, (1772) [2023-11-23 21:12:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5828 states to 5828 states and 8392 transitions. [2023-11-23 21:12:57,392 INFO L78 Accepts]: Start accepts. Automaton has 5828 states and 8392 transitions. Word has length 68 [2023-11-23 21:12:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:57,394 INFO L495 AbstractCegarLoop]: Abstraction has 5828 states and 8392 transitions. [2023-11-23 21:12:57,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:12:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 5828 states and 8392 transitions. [2023-11-23 21:12:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 21:12:57,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:57,398 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:57,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:12:57,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:57,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash -130024891, now seen corresponding path program 1 times [2023-11-23 21:12:57,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:57,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176193736] [2023-11-23 21:12:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-23 21:12:57,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:57,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176193736] [2023-11-23 21:12:57,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176193736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:57,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:57,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:57,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727666617] [2023-11-23 21:12:57,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:57,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:57,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:57,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:57,754 INFO L87 Difference]: Start difference. First operand 5828 states and 8392 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:13:02,294 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 21:13:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:03,501 INFO L93 Difference]: Finished difference Result 16545 states and 23781 transitions. [2023-11-23 21:13:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 75 [2023-11-23 21:13:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:03,596 INFO L225 Difference]: With dead ends: 16545 [2023-11-23 21:13:03,597 INFO L226 Difference]: Without dead ends: 10743 [2023-11-23 21:13:03,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:03,637 INFO L413 NwaCegarLoop]: 1661 mSDtfsCounter, 1435 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:03,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 3048 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-11-23 21:13:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2023-11-23 21:13:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 10730. [2023-11-23 21:13:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 6733 states have (on average 1.3267488489529184) internal successors, (8933), 6796 states have internal predecessors, (8933), 3239 states have call successors, (3239), 758 states have call predecessors, (3239), 757 states have return successors, (3232), 3223 states have call predecessors, (3232), 3232 states have call successors, (3232) [2023-11-23 21:13:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 15404 transitions. [2023-11-23 21:13:04,410 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 15404 transitions. Word has length 75 [2023-11-23 21:13:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:04,412 INFO L495 AbstractCegarLoop]: Abstraction has 10730 states and 15404 transitions. [2023-11-23 21:13:04,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:13:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 15404 transitions. [2023-11-23 21:13:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-23 21:13:04,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:04,416 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:04,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:13:04,416 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:04,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash 797438914, now seen corresponding path program 1 times [2023-11-23 21:13:04,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:04,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848617803] [2023-11-23 21:13:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:04,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-23 21:13:04,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:04,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848617803] [2023-11-23 21:13:04,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848617803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:04,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:04,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:04,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004713145] [2023-11-23 21:13:04,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:04,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:04,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:04,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:04,893 INFO L87 Difference]: Start difference. First operand 10730 states and 15404 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 21:13:06,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:13:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:08,225 INFO L93 Difference]: Finished difference Result 11914 states and 16681 transitions. [2023-11-23 21:13:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 78 [2023-11-23 21:13:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:08,315 INFO L225 Difference]: With dead ends: 11914 [2023-11-23 21:13:08,316 INFO L226 Difference]: Without dead ends: 11910 [2023-11-23 21:13:08,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:08,322 INFO L413 NwaCegarLoop]: 1452 mSDtfsCounter, 873 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:08,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 2182 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-23 21:13:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11910 states. [2023-11-23 21:13:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11910 to 11906. [2023-11-23 21:13:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11906 states, 7422 states have (on average 1.3127189436809485) internal successors, (9743), 7483 states have internal predecessors, (9743), 3461 states have call successors, (3461), 1023 states have call predecessors, (3461), 1022 states have return successors, (3456), 3447 states have call predecessors, (3456), 3456 states have call successors, (3456) [2023-11-23 21:13:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11906 states to 11906 states and 16660 transitions. [2023-11-23 21:13:09,019 INFO L78 Accepts]: Start accepts. Automaton has 11906 states and 16660 transitions. Word has length 78 [2023-11-23 21:13:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:09,021 INFO L495 AbstractCegarLoop]: Abstraction has 11906 states and 16660 transitions. [2023-11-23 21:13:09,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 21:13:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 11906 states and 16660 transitions. [2023-11-23 21:13:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 21:13:09,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:09,023 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:09,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:13:09,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:09,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:09,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1049860306, now seen corresponding path program 1 times [2023-11-23 21:13:09,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:09,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666872537] [2023-11-23 21:13:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-23 21:13:09,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:09,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666872537] [2023-11-23 21:13:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666872537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:09,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:09,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475315839] [2023-11-23 21:13:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:09,323 INFO L87 Difference]: Start difference. First operand 11906 states and 16660 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 21:13:11,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []