./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh --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 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:15:31,878 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:15:31,949 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 08:15:31,954 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:15:31,954 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:15:31,978 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:15:31,979 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:15:31,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:15:31,980 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:15:31,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:15:31,981 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:15:31,982 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:15:31,982 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:15:31,983 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:15:31,984 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:15:31,984 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:15:31,985 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:15:31,985 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:15:31,986 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:15:31,986 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:15:31,987 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:15:31,989 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:15:31,989 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:15:31,990 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 08:15:31,990 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:15:31,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:15:31,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 08:15:31,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:15:31,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 08:15:31,992 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 08:15:31,992 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:15:31,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:15:31,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:15:31,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:15:31,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:15:31,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:15:31,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:15:31,994 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 08:15:31,995 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:15:31,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:15:31,995 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:15:31,995 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 08:15:31,995 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:15:31,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:15:31,996 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_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d [2023-12-02 08:15:32,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:15:32,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:15:32,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:15:32,267 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:15:32,267 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:15:32,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-12-02 08:15:35,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:15:35,763 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:15:35,763 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-12-02 08:15:35,811 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/data/96d19bccd/d27b30e710c040b9bc17f180db4c3e04/FLAGe31b90300 [2023-12-02 08:15:35,825 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/data/96d19bccd/d27b30e710c040b9bc17f180db4c3e04 [2023-12-02 08:15:35,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:15:35,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:15:35,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:15:35,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:15:35,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:15:35,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:15:35" (1/1) ... [2023-12-02 08:15:35,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d1b827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:35, skipping insertion in model container [2023-12-02 08:15:35,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:15:35" (1/1) ... [2023-12-02 08:15:35,979 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:15:37,318 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_656f1097-879f-4862-a44d-10c279d77703/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2023-12-02 08:15:37,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:15:37,472 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:15:37,559 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [3258] [2023-12-02 08:15:37,562 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapl %0": "=r" (val): "0" (val)); [3265] [2023-12-02 08:15:37,562 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapq %0": "=r" (val): "0" (val)); [3272] [2023-12-02 08:15:37,563 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [3305] [2023-12-02 08:15:37,564 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3308] [2023-12-02 08:15:37,564 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3311] [2023-12-02 08:15:37,564 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3314] [2023-12-02 08:15:37,607 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [4080] [2023-12-02 08:15:37,608 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [4084] [2023-12-02 08:15:37,610 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgb %0,%1": "=q" (__x), "+m" (*__ptr): "0" (__x): "memory"); [4107] [2023-12-02 08:15:37,610 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgw %0,%1": "=r" (__x), "+m" (*__ptr___0): "0" (__x): "memory"); [4112] [2023-12-02 08:15:37,611 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgl %0,%1": "=r" (__x), "+m" (*__ptr___1): "0" (__x): "memory"); [4117] [2023-12-02 08:15:37,611 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgq %0,%1": "=r" (__x), "+m" (*__ptr___2): "0" (__x): "memory"); [4122] [2023-12-02 08:15:37,635 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [4581] [2023-12-02 08:15:37,778 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_656f1097-879f-4862-a44d-10c279d77703/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2023-12-02 08:15:37,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:15:37,865 WARN L675 CHandler]: The function __xchg_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:15:37,865 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:15:37,872 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:15:37,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37 WrapperNode [2023-12-02 08:15:37,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:15:37,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:15:37,874 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:15:37,874 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:15:37,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:37,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,104 INFO L138 Inliner]: procedures = 272, calls = 2588, calls flagged for inlining = 117, calls inlined = 96, statements flattened = 4358 [2023-12-02 08:15:38,104 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:15:38,105 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:15:38,105 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:15:38,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:15:38,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:15:38,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:15:38,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:15:38,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:15:38,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (1/1) ... [2023-12-02 08:15:38,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:15:38,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:15:38,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:15:38,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:15:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-12-02 08:15:38,414 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-12-02 08:15:38,414 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-12-02 08:15:38,414 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-12-02 08:15:38,414 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-12-02 08:15:38,414 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-12-02 08:15:38,415 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2023-12-02 08:15:38,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 08:15:38,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 08:15:38,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 08:15:38,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 08:15:38,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 08:15:38,416 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 08:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2023-12-02 08:15:38,416 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2023-12-02 08:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-12-02 08:15:38,416 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-12-02 08:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure usb_make_path [2023-12-02 08:15:38,417 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_make_path [2023-12-02 08:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 08:15:38,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 08:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure send_packet [2023-12-02 08:15:38,418 INFO L138 BoogieDeclarations]: Found implementation of procedure send_packet [2023-12-02 08:15:38,418 INFO L130 BoogieDeclarations]: Found specification of procedure dev_printk [2023-12-02 08:15:38,418 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_printk [2023-12-02 08:15:38,418 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2023-12-02 08:15:38,418 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2023-12-02 08:15:38,418 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 08:15:38,418 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 08:15:38,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 08:15:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 08:15:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure imon_disconnect [2023-12-02 08:15:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_disconnect [2023-12-02 08:15:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2023-12-02 08:15:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2023-12-02 08:15:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_imon_context [2023-12-02 08:15:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_imon_context [2023-12-02 08:15:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 08:15:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 08:15:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-12-02 08:15:38,420 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-12-02 08:15:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-12-02 08:15:38,420 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-12-02 08:15:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_driver_lock [2023-12-02 08:15:38,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_driver_lock [2023-12-02 08:15:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 08:15:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2023-12-02 08:15:38,421 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2023-12-02 08:15:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 08:15:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure input_allocate_device [2023-12-02 08:15:38,421 INFO L138 BoogieDeclarations]: Found implementation of procedure input_allocate_device [2023-12-02 08:15:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2023-12-02 08:15:38,421 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2023-12-02 08:15:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 08:15:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 08:15:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 08:15:38,422 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 08:15:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-12-02 08:15:38,422 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-12-02 08:15:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-12-02 08:15:38,423 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-12-02 08:15:38,423 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-12-02 08:15:38,423 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-12-02 08:15:38,423 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-12-02 08:15:38,423 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-12-02 08:15:38,423 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_drvdata [2023-12-02 08:15:38,423 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_drvdata [2023-12-02 08:15:38,423 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2023-12-02 08:15:38,423 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2023-12-02 08:15:38,424 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-12-02 08:15:38,424 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-12-02 08:15:38,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 08:15:38,424 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2023-12-02 08:15:38,424 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2023-12-02 08:15:38,424 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-12-02 08:15:38,425 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-12-02 08:15:38,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 08:15:38,425 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-12-02 08:15:38,425 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-12-02 08:15:38,425 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_device [2023-12-02 08:15:38,425 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_device [2023-12-02 08:15:38,425 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_group [2023-12-02 08:15:38,425 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_group [2023-12-02 08:15:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 08:15:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2023-12-02 08:15:38,426 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2023-12-02 08:15:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2023-12-02 08:15:38,426 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2023-12-02 08:15:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 08:15:38,426 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 08:15:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure lcd_write [2023-12-02 08:15:38,426 INFO L138 BoogieDeclarations]: Found implementation of procedure lcd_write [2023-12-02 08:15:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-12-02 08:15:38,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-12-02 08:15:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-12-02 08:15:38,427 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-12-02 08:15:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2023-12-02 08:15:38,427 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2023-12-02 08:15:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 08:15:38,428 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 08:15:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 08:15:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure usb_to_input_id [2023-12-02 08:15:38,428 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_to_input_id [2023-12-02 08:15:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2023-12-02 08:15:38,428 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2023-12-02 08:15:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure noop_llseek [2023-12-02 08:15:38,429 INFO L138 BoogieDeclarations]: Found implementation of procedure noop_llseek [2023-12-02 08:15:38,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 08:15:38,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 08:15:38,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 08:15:38,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 08:15:38,429 INFO L130 BoogieDeclarations]: Found specification of procedure free_imon_context [2023-12-02 08:15:38,429 INFO L138 BoogieDeclarations]: Found implementation of procedure free_imon_context [2023-12-02 08:15:38,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 08:15:38,429 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2023-12-02 08:15:38,429 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2023-12-02 08:15:38,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-12-02 08:15:38,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-12-02 08:15:38,430 INFO L130 BoogieDeclarations]: Found specification of procedure input_register_device [2023-12-02 08:15:38,430 INFO L138 BoogieDeclarations]: Found implementation of procedure input_register_device [2023-12-02 08:15:38,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_imon_context [2023-12-02 08:15:38,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_imon_context [2023-12-02 08:15:38,430 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-12-02 08:15:38,431 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-12-02 08:15:38,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:15:38,431 INFO L130 BoogieDeclarations]: Found specification of procedure vfd_write [2023-12-02 08:15:38,431 INFO L138 BoogieDeclarations]: Found implementation of procedure vfd_write [2023-12-02 08:15:38,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 08:15:38,431 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2023-12-02 08:15:38,431 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2023-12-02 08:15:38,431 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-12-02 08:15:38,432 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2023-12-02 08:15:38,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2023-12-02 08:15:38,432 INFO L130 BoogieDeclarations]: Found specification of procedure display_close [2023-12-02 08:15:38,432 INFO L138 BoogieDeclarations]: Found implementation of procedure display_close [2023-12-02 08:15:38,432 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_dev [2023-12-02 08:15:38,432 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_dev [2023-12-02 08:15:38,433 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-12-02 08:15:38,433 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-12-02 08:15:38,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_driver_lock [2023-12-02 08:15:38,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_driver_lock [2023-12-02 08:15:38,433 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2023-12-02 08:15:38,433 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2023-12-02 08:15:38,434 INFO L130 BoogieDeclarations]: Found specification of procedure imon_find_endpoints [2023-12-02 08:15:38,434 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_find_endpoints [2023-12-02 08:15:38,434 INFO L130 BoogieDeclarations]: Found specification of procedure display_open [2023-12-02 08:15:38,434 INFO L138 BoogieDeclarations]: Found implementation of procedure display_open [2023-12-02 08:15:38,434 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-12-02 08:15:38,434 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-12-02 08:15:38,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:15:38,435 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-12-02 08:15:38,435 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-12-02 08:15:38,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:15:38,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:15:39,000 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:15:39,004 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:15:39,527 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 08:15:45,715 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:15:46,639 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:15:46,639 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 08:15:46,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:15:46 BoogieIcfgContainer [2023-12-02 08:15:46,642 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:15:46,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:15:46,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:15:46,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:15:46,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:15:35" (1/3) ... [2023-12-02 08:15:46,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7948a71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:15:46, skipping insertion in model container [2023-12-02 08:15:46,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:37" (2/3) ... [2023-12-02 08:15:46,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7948a71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:15:46, skipping insertion in model container [2023-12-02 08:15:46,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:15:46" (3/3) ... [2023-12-02 08:15:46,652 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-12-02 08:15:46,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:15:46,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 08:15:46,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:15:46,771 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;@6822f181, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:15:46,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 08:15:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 671 states have (on average 1.3293591654247392) internal successors, (892), 693 states have internal predecessors, (892), 358 states have call successors, (358), 68 states have call predecessors, (358), 67 states have return successors, (351), 350 states have call predecessors, (351), 351 states have call successors, (351) [2023-12-02 08:15:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-12-02 08:15:46,806 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:46,807 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:46,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:46,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2133703868, now seen corresponding path program 1 times [2023-12-02 08:15:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:46,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47365814] [2023-12-02 08:15:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:46,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-12-02 08:15:47,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:47,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47365814] [2023-12-02 08:15:47,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47365814] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:15:47,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:15:47,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:15:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370671832] [2023-12-02 08:15:47,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:15:47,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:15:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:47,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:15:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:15:47,874 INFO L87 Difference]: Start difference. First operand has 1098 states, 671 states have (on average 1.3293591654247392) internal successors, (892), 693 states have internal predecessors, (892), 358 states have call successors, (358), 68 states have call predecessors, (358), 67 states have return successors, (351), 350 states have call predecessors, (351), 351 states have call successors, (351) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 08:15:49,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:15:50,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:15:53,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:15:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:53,767 INFO L93 Difference]: Finished difference Result 3138 states and 4668 transitions. [2023-12-02 08:15:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:15:53,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 167 [2023-12-02 08:15:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:53,811 INFO L225 Difference]: With dead ends: 3138 [2023-12-02 08:15:53,812 INFO L226 Difference]: Without dead ends: 2061 [2023-12-02 08:15:53,823 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 [2023-12-02 08:15:53,826 INFO L413 NwaCegarLoop]: 1465 mSDtfsCounter, 1469 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 2860 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:53,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1469 Valid, 2860 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-12-02 08:15:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2023-12-02 08:15:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 2047. [2023-12-02 08:15:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 1262 states have (on average 1.3153724247226624) internal successors, (1660), 1283 states have internal predecessors, (1660), 654 states have call successors, (654), 131 states have call predecessors, (654), 130 states have return successors, (647), 644 states have call predecessors, (647), 647 states have call successors, (647) [2023-12-02 08:15:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 2961 transitions. [2023-12-02 08:15:54,063 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 2961 transitions. Word has length 167 [2023-12-02 08:15:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:54,065 INFO L495 AbstractCegarLoop]: Abstraction has 2047 states and 2961 transitions. [2023-12-02 08:15:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 08:15:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 2961 transitions. [2023-12-02 08:15:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 08:15:54,070 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:54,070 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:54,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 08:15:54,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:54,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1688993521, now seen corresponding path program 1 times [2023-12-02 08:15:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:54,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147173450] [2023-12-02 08:15:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:54,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-12-02 08:15:54,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147173450] [2023-12-02 08:15:54,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147173450] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:15:54,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:15:54,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:15:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716682562] [2023-12-02 08:15:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:15:54,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:15:54,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:54,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:15:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:15:54,606 INFO L87 Difference]: Start difference. First operand 2047 states and 2961 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 08:15:57,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:15:59,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:01,300 INFO L93 Difference]: Finished difference Result 4974 states and 7172 transitions. [2023-12-02 08:16:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:16:01,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 168 [2023-12-02 08:16:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:01,320 INFO L225 Difference]: With dead ends: 4974 [2023-12-02 08:16:01,320 INFO L226 Difference]: Without dead ends: 2967 [2023-12-02 08:16:01,327 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 [2023-12-02 08:16:01,328 INFO L413 NwaCegarLoop]: 1519 mSDtfsCounter, 770 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 2900 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:01,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 2900 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2023-12-02 08:16:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2023-12-02 08:16:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2954. [2023-12-02 08:16:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 1845 states have (on average 1.3257452574525745) internal successors, (2446), 1866 states have internal predecessors, (2446), 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) [2023-12-02 08:16:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4253 transitions. [2023-12-02 08:16:01,512 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4253 transitions. Word has length 168 [2023-12-02 08:16:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:01,513 INFO L495 AbstractCegarLoop]: Abstraction has 2954 states and 4253 transitions. [2023-12-02 08:16:01,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 08:16:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4253 transitions. [2023-12-02 08:16:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-12-02 08:16:01,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:01,517 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 08:16:01,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:01,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -734834842, now seen corresponding path program 1 times [2023-12-02 08:16:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721347252] [2023-12-02 08:16:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:01,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-12-02 08:16:02,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:02,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721347252] [2023-12-02 08:16:02,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721347252] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:02,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:02,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:16:02,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894684926] [2023-12-02 08:16:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:02,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:16:02,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:02,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:16:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:02,145 INFO L87 Difference]: Start difference. First operand 2954 states and 4253 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 08:16:04,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:06,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:09,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:10,318 INFO L93 Difference]: Finished difference Result 8717 states and 12553 transitions. [2023-12-02 08:16:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:16:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 166 [2023-12-02 08:16:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:10,365 INFO L225 Difference]: With dead ends: 8717 [2023-12-02 08:16:10,366 INFO L226 Difference]: Without dead ends: 5811 [2023-12-02 08:16:10,380 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 [2023-12-02 08:16:10,381 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 1472 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:10,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 2994 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 259 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2023-12-02 08:16:10,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2023-12-02 08:16:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 5803. [2023-12-02 08:16:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 3634 states have (on average 1.32526141992295) internal successors, (4816), 3669 states have internal predecessors, (4816), 1769 states have call successors, (1769), 400 states have call predecessors, (1769), 399 states have return successors, (1762), 1757 states have call predecessors, (1762), 1762 states have call successors, (1762) [2023-12-02 08:16:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 8347 transitions. [2023-12-02 08:16:10,750 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 8347 transitions. Word has length 166 [2023-12-02 08:16:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:10,751 INFO L495 AbstractCegarLoop]: Abstraction has 5803 states and 8347 transitions. [2023-12-02 08:16:10,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 08:16:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 8347 transitions. [2023-12-02 08:16:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 08:16:10,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:10,755 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 08:16:10,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:10,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash 841217622, now seen corresponding path program 1 times [2023-12-02 08:16:10,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:10,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609785540] [2023-12-02 08:16:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:10,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-12-02 08:16:11,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609785540] [2023-12-02 08:16:11,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609785540] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:11,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:11,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:16:11,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700993127] [2023-12-02 08:16:11,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:11,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:16:11,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:16:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:11,092 INFO L87 Difference]: Start difference. First operand 5803 states and 8347 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 08:16:15,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:16,748 INFO L93 Difference]: Finished difference Result 16457 states and 23632 transitions. [2023-12-02 08:16:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:16:16,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 173 [2023-12-02 08:16:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:16,834 INFO L225 Difference]: With dead ends: 16457 [2023-12-02 08:16:16,835 INFO L226 Difference]: Without dead ends: 10702 [2023-12-02 08:16:16,854 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 [2023-12-02 08:16:16,855 INFO L413 NwaCegarLoop]: 1668 mSDtfsCounter, 1455 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 3046 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:16,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1455 Valid, 3046 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-12-02 08:16:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10702 states. [2023-12-02 08:16:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10702 to 10689. [2023-12-02 08:16:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 6716 states have (on average 1.324895771292436) internal successors, (8898), 6779 states have internal predecessors, (8898), 3219 states have call successors, (3219), 754 states have call predecessors, (3219), 753 states have return successors, (3212), 3203 states have call predecessors, (3212), 3212 states have call successors, (3212) [2023-12-02 08:16:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 15329 transitions. [2023-12-02 08:16:17,547 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 15329 transitions. Word has length 173 [2023-12-02 08:16:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:17,548 INFO L495 AbstractCegarLoop]: Abstraction has 10689 states and 15329 transitions. [2023-12-02 08:16:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 08:16:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 15329 transitions. [2023-12-02 08:16:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-02 08:16:17,552 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:17,552 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:17,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 08:16:17,553 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:17,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1053674950, now seen corresponding path program 1 times [2023-12-02 08:16:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:17,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626283009] [2023-12-02 08:16:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:17,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-12-02 08:16:17,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:17,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626283009] [2023-12-02 08:16:17,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626283009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:17,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:17,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:16:17,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176194389] [2023-12-02 08:16:17,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:17,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:16:17,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:17,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:16:17,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:17,900 INFO L87 Difference]: Start difference. First operand 10689 states and 15329 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 08:16:20,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:23,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:25,694 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 [] [2023-12-02 08:16:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:27,127 INFO L93 Difference]: Finished difference Result 31087 states and 44520 transitions. [2023-12-02 08:16:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:16:27,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 181 [2023-12-02 08:16:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:27,238 INFO L225 Difference]: With dead ends: 31087 [2023-12-02 08:16:27,238 INFO L226 Difference]: Without dead ends: 20446 [2023-12-02 08:16:27,314 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 [2023-12-02 08:16:27,315 INFO L413 NwaCegarLoop]: 1752 mSDtfsCounter, 1465 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:27,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1465 Valid, 3139 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 3 Unknown, 0 Unchecked, 8.7s Time] [2023-12-02 08:16:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20446 states. [2023-12-02 08:16:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20446 to 20431. [2023-12-02 08:16:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20431 states, 12838 states have (on average 1.3246611621747937) internal successors, (17006), 12959 states have internal predecessors, (17006), 6113 states have call successors, (6113), 1480 states have call predecessors, (6113), 1479 states have return successors, (6106), 6087 states have call predecessors, (6106), 6106 states have call successors, (6106) [2023-12-02 08:16:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20431 states to 20431 states and 29225 transitions. [2023-12-02 08:16:28,751 INFO L78 Accepts]: Start accepts. Automaton has 20431 states and 29225 transitions. Word has length 181 [2023-12-02 08:16:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:28,752 INFO L495 AbstractCegarLoop]: Abstraction has 20431 states and 29225 transitions. [2023-12-02 08:16:28,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 08:16:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20431 states and 29225 transitions. [2023-12-02 08:16:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-12-02 08:16:28,756 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:28,756 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:28,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 08:16:28,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:28,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1555603254, now seen corresponding path program 1 times [2023-12-02 08:16:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:28,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442433584] [2023-12-02 08:16:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:28,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-12-02 08:16:29,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442433584] [2023-12-02 08:16:29,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442433584] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:29,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:29,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:16:29,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864920345] [2023-12-02 08:16:29,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:29,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:16:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:16:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:29,150 INFO L87 Difference]: Start difference. First operand 20431 states and 29225 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 08:16:32,815 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 [] [2023-12-02 08:16:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:35,384 INFO L93 Difference]: Finished difference Result 59237 states and 84417 transitions. [2023-12-02 08:16:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:16:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 179 [2023-12-02 08:16:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:35,609 INFO L225 Difference]: With dead ends: 59237 [2023-12-02 08:16:35,609 INFO L226 Difference]: Without dead ends: 38854 [2023-12-02 08:16:35,686 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 [2023-12-02 08:16:35,687 INFO L413 NwaCegarLoop]: 1765 mSDtfsCounter, 1463 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:35,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1463 Valid, 3152 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2023-12-02 08:16:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38854 states. [2023-12-02 08:16:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38854 to 38839. [2023-12-02 08:16:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38839 states, 24243 states have (on average 1.3146475271212308) internal successors, (31871), 24480 states have internal predecessors, (31871), 11673 states have call successors, (11673), 2923 states have call predecessors, (11673), 2922 states have return successors, (11666), 11627 states have call predecessors, (11666), 11666 states have call successors, (11666) [2023-12-02 08:16:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38839 states to 38839 states and 55210 transitions. [2023-12-02 08:16:37,794 INFO L78 Accepts]: Start accepts. Automaton has 38839 states and 55210 transitions. Word has length 179 [2023-12-02 08:16:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:37,794 INFO L495 AbstractCegarLoop]: Abstraction has 38839 states and 55210 transitions. [2023-12-02 08:16:37,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 08:16:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 38839 states and 55210 transitions. [2023-12-02 08:16:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-12-02 08:16:37,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:37,798 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:37,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 08:16:37,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:37,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:37,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1359220852, now seen corresponding path program 1 times [2023-12-02 08:16:37,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:37,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630492737] [2023-12-02 08:16:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:37,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-12-02 08:16:38,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:38,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630492737] [2023-12-02 08:16:38,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630492737] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:38,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:38,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:16:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793347045] [2023-12-02 08:16:38,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:38,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:16:38,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:38,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:16:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:38,189 INFO L87 Difference]: Start difference. First operand 38839 states and 55210 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 08:16:39,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:43,431 INFO L93 Difference]: Finished difference Result 43493 states and 60262 transitions. [2023-12-02 08:16:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:16:43,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 183 [2023-12-02 08:16:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:43,556 INFO L225 Difference]: With dead ends: 43493 [2023-12-02 08:16:43,557 INFO L226 Difference]: Without dead ends: 43489 [2023-12-02 08:16:43,572 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 [2023-12-02 08:16:43,573 INFO L413 NwaCegarLoop]: 1478 mSDtfsCounter, 882 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:43,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 2178 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-02 08:16:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43489 states. [2023-12-02 08:16:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43489 to 43485. [2023-12-02 08:16:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43485 states, 26967 states have (on average 1.3009233507620426) internal successors, (35082), 27202 states have internal predecessors, (35082), 12561 states have call successors, (12561), 3957 states have call predecessors, (12561), 3956 states have return successors, (12556), 12517 states have call predecessors, (12556), 12556 states have call successors, (12556) [2023-12-02 08:16:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43485 states to 43485 states and 60199 transitions. [2023-12-02 08:16:45,710 INFO L78 Accepts]: Start accepts. Automaton has 43485 states and 60199 transitions. Word has length 183 [2023-12-02 08:16:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:45,711 INFO L495 AbstractCegarLoop]: Abstraction has 43485 states and 60199 transitions. [2023-12-02 08:16:45,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 08:16:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43485 states and 60199 transitions. [2023-12-02 08:16:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-12-02 08:16:45,714 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:45,714 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:45,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 08:16:45,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:45,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash -814364675, now seen corresponding path program 1 times [2023-12-02 08:16:45,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:45,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069631641] [2023-12-02 08:16:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-12-02 08:16:46,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:46,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069631641] [2023-12-02 08:16:46,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069631641] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:46,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:46,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:16:46,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933701445] [2023-12-02 08:16:46,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:46,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:16:46,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:46,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:16:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:46,099 INFO L87 Difference]: Start difference. First operand 43485 states and 60199 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 08:16:47,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:49,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:16:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:54,947 INFO L93 Difference]: Finished difference Result 105365 states and 144950 transitions. [2023-12-02 08:16:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:16:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 184 [2023-12-02 08:16:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:55,159 INFO L225 Difference]: With dead ends: 105365 [2023-12-02 08:16:55,159 INFO L226 Difference]: Without dead ends: 61930 [2023-12-02 08:16:55,259 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 [2023-12-02 08:16:55,259 INFO L413 NwaCegarLoop]: 1507 mSDtfsCounter, 844 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:55,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 2707 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-12-02 08:16:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61930 states. [2023-12-02 08:16:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61930 to 61180. [2023-12-02 08:16:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61180 states, 38249 states have (on average 1.302020967868441) internal successors, (49801), 38887 states have internal predecessors, (49801), 16809 states have call successors, (16809), 6271 states have call predecessors, (16809), 6121 states have return successors, (17058), 16277 states have call predecessors, (17058), 16802 states have call successors, (17058) [2023-12-02 08:16:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61180 states to 61180 states and 83668 transitions. [2023-12-02 08:16:57,918 INFO L78 Accepts]: Start accepts. Automaton has 61180 states and 83668 transitions. Word has length 184 [2023-12-02 08:16:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:57,919 INFO L495 AbstractCegarLoop]: Abstraction has 61180 states and 83668 transitions. [2023-12-02 08:16:57,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 08:16:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 61180 states and 83668 transitions. [2023-12-02 08:16:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-12-02 08:16:57,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:57,924 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:57,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 08:16:57,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:57,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash 523965591, now seen corresponding path program 1 times [2023-12-02 08:16:57,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:57,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054238621] [2023-12-02 08:16:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:57,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-12-02 08:16:58,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:58,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054238621] [2023-12-02 08:16:58,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054238621] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:58,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:58,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:16:58,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203942466] [2023-12-02 08:16:58,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:58,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:16:58,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:16:58,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:58,295 INFO L87 Difference]: Start difference. First operand 61180 states and 83668 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 08:17:00,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:02,975 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 [] [2023-12-02 08:17:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:05,899 INFO L93 Difference]: Finished difference Result 61182 states and 83669 transitions. [2023-12-02 08:17:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:17:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2023-12-02 08:17:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:06,065 INFO L225 Difference]: With dead ends: 61182 [2023-12-02 08:17:06,065 INFO L226 Difference]: Without dead ends: 61175 [2023-12-02 08:17:06,086 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 [2023-12-02 08:17:06,087 INFO L413 NwaCegarLoop]: 1444 mSDtfsCounter, 1514 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:06,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1514 Valid, 1444 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2023-12-02 08:17:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61175 states. [2023-12-02 08:17:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61175 to 61175. [2023-12-02 08:17:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61175 states, 38245 states have (on average 1.3007451954503857) internal successors, (49747), 38882 states have internal predecessors, (49747), 16808 states have call successors, (16808), 6271 states have call predecessors, (16808), 6121 states have return successors, (17058), 16277 states have call predecessors, (17058), 16802 states have call successors, (17058) [2023-12-02 08:17:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61175 states to 61175 states and 83613 transitions. [2023-12-02 08:17:09,066 INFO L78 Accepts]: Start accepts. Automaton has 61175 states and 83613 transitions. Word has length 185 [2023-12-02 08:17:09,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:09,067 INFO L495 AbstractCegarLoop]: Abstraction has 61175 states and 83613 transitions. [2023-12-02 08:17:09,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 08:17:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 61175 states and 83613 transitions. [2023-12-02 08:17:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-02 08:17:09,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:09,071 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2023-12-02 08:17:09,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 08:17:09,072 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:17:09,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:09,072 INFO L85 PathProgramCache]: Analyzing trace with hash 76918592, now seen corresponding path program 1 times [2023-12-02 08:17:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866761029] [2023-12-02 08:17:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2023-12-02 08:17:09,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866761029] [2023-12-02 08:17:09,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866761029] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:09,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:09,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:17:09,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967315991] [2023-12-02 08:17:09,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:09,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:17:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:17:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:09,474 INFO L87 Difference]: Start difference. First operand 61175 states and 83613 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-12-02 08:17:11,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:13,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:15,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:18,642 INFO L93 Difference]: Finished difference Result 92323 states and 126105 transitions. [2023-12-02 08:17:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:17:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 248 [2023-12-02 08:17:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:18,750 INFO L225 Difference]: With dead ends: 92323 [2023-12-02 08:17:18,750 INFO L226 Difference]: Without dead ends: 31182 [2023-12-02 08:17:18,866 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 [2023-12-02 08:17:18,866 INFO L413 NwaCegarLoop]: 1447 mSDtfsCounter, 6 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:18,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2886 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2023-12-02 08:17:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31182 states. [2023-12-02 08:17:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31182 to 30857. [2023-12-02 08:17:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30857 states, 19269 states have (on average 1.302454720016607) internal successors, (25097), 19596 states have internal predecessors, (25097), 8472 states have call successors, (8472), 3191 states have call predecessors, (8472), 3115 states have return successors, (8594), 8197 states have call predecessors, (8594), 8466 states have call successors, (8594) [2023-12-02 08:17:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30857 states to 30857 states and 42163 transitions. [2023-12-02 08:17:20,230 INFO L78 Accepts]: Start accepts. Automaton has 30857 states and 42163 transitions. Word has length 248 [2023-12-02 08:17:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:20,231 INFO L495 AbstractCegarLoop]: Abstraction has 30857 states and 42163 transitions. [2023-12-02 08:17:20,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-12-02 08:17:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 30857 states and 42163 transitions. [2023-12-02 08:17:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-12-02 08:17:20,240 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:20,241 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 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] [2023-12-02 08:17:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 08:17:20,241 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:17:20,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1643309371, now seen corresponding path program 1 times [2023-12-02 08:17:20,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:20,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882390671] [2023-12-02 08:17:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2023-12-02 08:17:20,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:20,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882390671] [2023-12-02 08:17:20,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882390671] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:20,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:20,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:17:20,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723803510] [2023-12-02 08:17:20,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:20,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:17:20,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:17:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:20,944 INFO L87 Difference]: Start difference. First operand 30857 states and 42163 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-12-02 08:17:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:26,062 INFO L93 Difference]: Finished difference Result 61620 states and 84200 transitions. [2023-12-02 08:17:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:17:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 303 [2023-12-02 08:17:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:26,147 INFO L225 Difference]: With dead ends: 61620 [2023-12-02 08:17:26,147 INFO L226 Difference]: Without dead ends: 30860 [2023-12-02 08:17:26,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:26,217 INFO L413 NwaCegarLoop]: 1939 mSDtfsCounter, 1305 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:26,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 2742 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-02 08:17:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30860 states. [2023-12-02 08:17:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30860 to 30487. [2023-12-02 08:17:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30487 states, 19110 states have (on average 1.298901098901099) internal successors, (24822), 19328 states have internal predecessors, (24822), 8276 states have call successors, (8276), 3119 states have call predecessors, (8276), 3100 states have return successors, (8227), 8167 states have call predecessors, (8227), 8227 states have call successors, (8227) [2023-12-02 08:17:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30487 states to 30487 states and 41325 transitions. [2023-12-02 08:17:27,494 INFO L78 Accepts]: Start accepts. Automaton has 30487 states and 41325 transitions. Word has length 303 [2023-12-02 08:17:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:27,495 INFO L495 AbstractCegarLoop]: Abstraction has 30487 states and 41325 transitions. [2023-12-02 08:17:27,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-12-02 08:17:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 30487 states and 41325 transitions. [2023-12-02 08:17:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-12-02 08:17:27,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:27,515 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 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] [2023-12-02 08:17:27,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 08:17:27,515 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:17:27,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash 501467227, now seen corresponding path program 1 times [2023-12-02 08:17:27,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:27,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930522184] [2023-12-02 08:17:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:27,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2023-12-02 08:17:27,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:27,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930522184] [2023-12-02 08:17:27,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930522184] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:27,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:27,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:17:27,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322680798] [2023-12-02 08:17:27,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:27,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:17:27,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:17:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:27,998 INFO L87 Difference]: Start difference. First operand 30487 states and 41325 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-12-02 08:17:30,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:31,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:32,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:35,914 INFO L93 Difference]: Finished difference Result 30497 states and 41333 transitions. [2023-12-02 08:17:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:17:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 311 [2023-12-02 08:17:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:35,998 INFO L225 Difference]: With dead ends: 30497 [2023-12-02 08:17:35,998 INFO L226 Difference]: Without dead ends: 30494 [2023-12-02 08:17:36,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:36,014 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 770 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:36,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 2391 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2023-12-02 08:17:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30494 states. [2023-12-02 08:17:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30494 to 30486. [2023-12-02 08:17:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30486 states, 19110 states have (on average 1.295970695970696) internal successors, (24766), 19327 states have internal predecessors, (24766), 8275 states have call successors, (8275), 3119 states have call predecessors, (8275), 3100 states have return successors, (8227), 8167 states have call predecessors, (8227), 8227 states have call successors, (8227) [2023-12-02 08:17:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30486 states to 30486 states and 41268 transitions. [2023-12-02 08:17:37,295 INFO L78 Accepts]: Start accepts. Automaton has 30486 states and 41268 transitions. Word has length 311 [2023-12-02 08:17:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:37,296 INFO L495 AbstractCegarLoop]: Abstraction has 30486 states and 41268 transitions. [2023-12-02 08:17:37,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-12-02 08:17:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 30486 states and 41268 transitions. [2023-12-02 08:17:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-12-02 08:17:37,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:37,346 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:37,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 08:17:37,346 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:17:37,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash 251658107, now seen corresponding path program 1 times [2023-12-02 08:17:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:37,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216288616] [2023-12-02 08:17:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2023-12-02 08:17:38,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216288616] [2023-12-02 08:17:38,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216288616] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:38,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:38,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:17:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140025501] [2023-12-02 08:17:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:17:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:17:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:17:38,454 INFO L87 Difference]: Start difference. First operand 30486 states and 41268 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-12-02 08:17:41,331 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 [] [2023-12-02 08:17:43,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:47,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:51,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:53,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:17:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:54,705 INFO L93 Difference]: Finished difference Result 73250 states and 102107 transitions. [2023-12-02 08:17:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:17:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 371 [2023-12-02 08:17:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:54,832 INFO L225 Difference]: With dead ends: 73250 [2023-12-02 08:17:54,832 INFO L226 Difference]: Without dead ends: 42861 [2023-12-02 08:17:54,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:17:54,898 INFO L413 NwaCegarLoop]: 2181 mSDtfsCounter, 637 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 71 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 5542 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:54,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 5542 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 444 Invalid, 4 Unknown, 0 Unchecked, 14.4s Time] [2023-12-02 08:17:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42861 states. [2023-12-02 08:17:56,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42861 to 30518. [2023-12-02 08:17:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30518 states, 19142 states have (on average 1.2946400585100826) internal successors, (24782), 19359 states have internal predecessors, (24782), 8275 states have call successors, (8275), 3119 states have call predecessors, (8275), 3100 states have return successors, (8227), 8167 states have call predecessors, (8227), 8227 states have call successors, (8227) [2023-12-02 08:17:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30518 states to 30518 states and 41284 transitions. [2023-12-02 08:17:56,714 INFO L78 Accepts]: Start accepts. Automaton has 30518 states and 41284 transitions. Word has length 371 [2023-12-02 08:17:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:56,714 INFO L495 AbstractCegarLoop]: Abstraction has 30518 states and 41284 transitions. [2023-12-02 08:17:56,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-12-02 08:17:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 30518 states and 41284 transitions. [2023-12-02 08:17:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-12-02 08:17:56,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:56,766 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:56,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 08:17:56,767 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:17:56,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash 385624233, now seen corresponding path program 1 times [2023-12-02 08:17:56,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:56,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617419054] [2023-12-02 08:17:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:56,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1667 trivial. 0 not checked. [2023-12-02 08:17:57,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:57,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617419054] [2023-12-02 08:17:57,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617419054] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:17:57,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:17:57,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:17:57,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138349945] [2023-12-02 08:17:57,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:17:57,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:17:57,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:57,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:17:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:17:57,257 INFO L87 Difference]: Start difference. First operand 30518 states and 41284 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2023-12-02 08:17:59,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:00,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:02,970 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 [] [2023-12-02 08:18:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:05,979 INFO L93 Difference]: Finished difference Result 62011 states and 84104 transitions. [2023-12-02 08:18:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 375 [2023-12-02 08:18:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:06,065 INFO L225 Difference]: With dead ends: 62011 [2023-12-02 08:18:06,065 INFO L226 Difference]: Without dead ends: 31590 [2023-12-02 08:18:06,121 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 [2023-12-02 08:18:06,122 INFO L413 NwaCegarLoop]: 1519 mSDtfsCounter, 179 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2786 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:06,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 2786 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2023-12-02 08:18:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31590 states. [2023-12-02 08:18:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31590 to 30550. [2023-12-02 08:18:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30550 states, 19158 states have (on average 1.2935588265998539) internal successors, (24782), 19375 states have internal predecessors, (24782), 8291 states have call successors, (8291), 3119 states have call predecessors, (8291), 3100 states have return successors, (8243), 8183 states have call predecessors, (8243), 8243 states have call successors, (8243) [2023-12-02 08:18:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30550 states to 30550 states and 41316 transitions. [2023-12-02 08:18:07,701 INFO L78 Accepts]: Start accepts. Automaton has 30550 states and 41316 transitions. Word has length 375 [2023-12-02 08:18:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:07,702 INFO L495 AbstractCegarLoop]: Abstraction has 30550 states and 41316 transitions. [2023-12-02 08:18:07,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2023-12-02 08:18:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 30550 states and 41316 transitions. [2023-12-02 08:18:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2023-12-02 08:18:07,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:07,738 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:07,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 08:18:07,738 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:07,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1575801821, now seen corresponding path program 1 times [2023-12-02 08:18:07,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:07,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136254299] [2023-12-02 08:18:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:07,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1667 trivial. 0 not checked. [2023-12-02 08:18:09,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:09,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136254299] [2023-12-02 08:18:09,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136254299] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:09,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:18:09,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:18:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008719725] [2023-12-02 08:18:09,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:09,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:18:09,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:09,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:18:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:18:09,042 INFO L87 Difference]: Start difference. First operand 30550 states and 41316 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-12-02 08:18:10,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:11,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:13,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:16,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:21,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:23,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:24,580 INFO L93 Difference]: Finished difference Result 71310 states and 98956 transitions. [2023-12-02 08:18:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:18:24,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 378 [2023-12-02 08:18:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:24,695 INFO L225 Difference]: With dead ends: 71310 [2023-12-02 08:18:24,695 INFO L226 Difference]: Without dead ends: 40857 [2023-12-02 08:18:24,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:18:24,759 INFO L413 NwaCegarLoop]: 2077 mSDtfsCounter, 577 mSDsluCounter, 3307 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 45 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 5384 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:24,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 5384 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 436 Invalid, 2 Unknown, 0 Unchecked, 13.7s Time] [2023-12-02 08:18:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40857 states. [2023-12-02 08:18:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40857 to 30131. [2023-12-02 08:18:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30131 states, 18922 states have (on average 1.29204101046401) internal successors, (24448), 19123 states have internal predecessors, (24448), 8158 states have call successors, (8158), 3069 states have call predecessors, (8158), 3050 states have return successors, (8111), 8066 states have call predecessors, (8111), 8111 states have call successors, (8111) [2023-12-02 08:18:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30131 states to 30131 states and 40717 transitions. [2023-12-02 08:18:26,524 INFO L78 Accepts]: Start accepts. Automaton has 30131 states and 40717 transitions. Word has length 378 [2023-12-02 08:18:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:26,525 INFO L495 AbstractCegarLoop]: Abstraction has 30131 states and 40717 transitions. [2023-12-02 08:18:26,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-12-02 08:18:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 30131 states and 40717 transitions. [2023-12-02 08:18:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2023-12-02 08:18:26,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:26,567 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:26,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 08:18:26,567 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:26,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -851560613, now seen corresponding path program 1 times [2023-12-02 08:18:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:26,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623744679] [2023-12-02 08:18:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:26,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2023-12-02 08:18:28,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:28,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623744679] [2023-12-02 08:18:28,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623744679] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:28,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813534930] [2023-12-02 08:18:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:28,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:28,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:28,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:28,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:18:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:30,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 6045 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 08:18:30,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2023-12-02 08:18:30,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:30,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813534930] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:30,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:30,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2023-12-02 08:18:30,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533020935] [2023-12-02 08:18:30,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:30,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:18:30,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:18:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:30,167 INFO L87 Difference]: Start difference. First operand 30131 states and 40717 transitions. Second operand has 7 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-12-02 08:18:34,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:36,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:38,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:40,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:41,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:43,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:49,998 INFO L93 Difference]: Finished difference Result 60715 states and 82267 transitions. [2023-12-02 08:18:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:18:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) Word has length 428 [2023-12-02 08:18:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:50,087 INFO L225 Difference]: With dead ends: 60715 [2023-12-02 08:18:50,087 INFO L226 Difference]: Without dead ends: 30681 [2023-12-02 08:18:50,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:50,148 INFO L413 NwaCegarLoop]: 1441 mSDtfsCounter, 4 mSDsluCounter, 7197 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8638 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:50,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8638 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 766 Invalid, 3 Unknown, 0 Unchecked, 18.3s Time] [2023-12-02 08:18:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30681 states. [2023-12-02 08:18:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30681 to 30323. [2023-12-02 08:18:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30323 states, 19050 states have (on average 1.2900787401574803) internal successors, (24576), 19251 states have internal predecessors, (24576), 8158 states have call successors, (8158), 3069 states have call predecessors, (8158), 3114 states have return successors, (8391), 8130 states have call predecessors, (8391), 8111 states have call successors, (8391) [2023-12-02 08:18:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30323 states to 30323 states and 41125 transitions. [2023-12-02 08:18:51,810 INFO L78 Accepts]: Start accepts. Automaton has 30323 states and 41125 transitions. Word has length 428 [2023-12-02 08:18:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:51,811 INFO L495 AbstractCegarLoop]: Abstraction has 30323 states and 41125 transitions. [2023-12-02 08:18:51,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-12-02 08:18:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 30323 states and 41125 transitions. [2023-12-02 08:18:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-12-02 08:18:51,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:51,853 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:51,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 08:18:52,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 08:18:52,054 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:52,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:52,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2108615023, now seen corresponding path program 1 times [2023-12-02 08:18:52,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:52,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840987601] [2023-12-02 08:18:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:52,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1725 trivial. 0 not checked. [2023-12-02 08:18:52,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840987601] [2023-12-02 08:18:52,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840987601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:52,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:18:52,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:18:52,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352650751] [2023-12-02 08:18:52,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:52,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:52,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:18:52,867 INFO L87 Difference]: Start difference. First operand 30323 states and 41125 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2023-12-02 08:18:54,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:56,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:18:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:59,716 INFO L93 Difference]: Finished difference Result 61093 states and 83034 transitions. [2023-12-02 08:18:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 432 [2023-12-02 08:18:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:59,789 INFO L225 Difference]: With dead ends: 61093 [2023-12-02 08:18:59,790 INFO L226 Difference]: Without dead ends: 30867 [2023-12-02 08:18:59,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:18:59,839 INFO L413 NwaCegarLoop]: 1438 mSDtfsCounter, 27 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:59,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 2874 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-12-02 08:18:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30867 states. [2023-12-02 08:19:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30867 to 30803. [2023-12-02 08:19:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30803 states, 19402 states have (on average 1.2930625708689827) internal successors, (25088), 19603 states have internal predecessors, (25088), 8286 states have call successors, (8286), 3069 states have call predecessors, (8286), 3114 states have return successors, (8519), 8258 states have call predecessors, (8519), 8239 states have call successors, (8519) [2023-12-02 08:19:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30803 states to 30803 states and 41893 transitions. [2023-12-02 08:19:01,340 INFO L78 Accepts]: Start accepts. Automaton has 30803 states and 41893 transitions. Word has length 432 [2023-12-02 08:19:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:01,340 INFO L495 AbstractCegarLoop]: Abstraction has 30803 states and 41893 transitions. [2023-12-02 08:19:01,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2023-12-02 08:19:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 30803 states and 41893 transitions. [2023-12-02 08:19:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-12-02 08:19:01,386 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:01,387 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:01,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 08:19:01,387 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:01,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:01,387 INFO L85 PathProgramCache]: Analyzing trace with hash 374971957, now seen corresponding path program 1 times [2023-12-02 08:19:01,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743829534] [2023-12-02 08:19:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:01,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1727 trivial. 0 not checked. [2023-12-02 08:19:02,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743829534] [2023-12-02 08:19:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743829534] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:02,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:19:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859758097] [2023-12-02 08:19:02,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:02,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:19:02,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:19:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:19:02,238 INFO L87 Difference]: Start difference. First operand 30803 states and 41893 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2023-12-02 08:19:04,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:06,646 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 [] [2023-12-02 08:19:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:10,514 INFO L93 Difference]: Finished difference Result 61909 states and 84346 transitions. [2023-12-02 08:19:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:19:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 436 [2023-12-02 08:19:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:10,600 INFO L225 Difference]: With dead ends: 61909 [2023-12-02 08:19:10,601 INFO L226 Difference]: Without dead ends: 31203 [2023-12-02 08:19:10,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:19:10,669 INFO L413 NwaCegarLoop]: 1448 mSDtfsCounter, 23 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:10,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2873 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2023-12-02 08:19:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31203 states. [2023-12-02 08:19:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31203 to 31043. [2023-12-02 08:19:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31043 states, 19610 states have (on average 1.2956654767975522) internal successors, (25408), 19811 states have internal predecessors, (25408), 8318 states have call successors, (8318), 3069 states have call predecessors, (8318), 3114 states have return successors, (8551), 8290 states have call predecessors, (8551), 8271 states have call successors, (8551) [2023-12-02 08:19:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31043 states to 31043 states and 42277 transitions. [2023-12-02 08:19:12,322 INFO L78 Accepts]: Start accepts. Automaton has 31043 states and 42277 transitions. Word has length 436 [2023-12-02 08:19:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:12,322 INFO L495 AbstractCegarLoop]: Abstraction has 31043 states and 42277 transitions. [2023-12-02 08:19:12,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2023-12-02 08:19:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 31043 states and 42277 transitions. [2023-12-02 08:19:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-12-02 08:19:12,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:12,366 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:12,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 08:19:12,367 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:12,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash -575018052, now seen corresponding path program 1 times [2023-12-02 08:19:12,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:12,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273369645] [2023-12-02 08:19:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1735 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1726 trivial. 0 not checked. [2023-12-02 08:19:13,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273369645] [2023-12-02 08:19:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273369645] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861727941] [2023-12-02 08:19:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:13,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:13,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:13,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:13,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 08:19:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:14,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 6182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 08:19:14,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1735 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1727 trivial. 0 not checked. [2023-12-02 08:19:15,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:15,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861727941] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:15,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:15,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 10 [2023-12-02 08:19:15,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410417952] [2023-12-02 08:19:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 08:19:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 08:19:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-02 08:19:15,024 INFO L87 Difference]: Start difference. First operand 31043 states and 42277 transitions. Second operand has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 3 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2023-12-02 08:19:17,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:22,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:23,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:24,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:26,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:27,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:28,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:30,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:32,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:40,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:42,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:45,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:46,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:19:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:51,272 INFO L93 Difference]: Finished difference Result 75180 states and 105439 transitions. [2023-12-02 08:19:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:19:51,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 3 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) Word has length 441 [2023-12-02 08:19:51,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:51,394 INFO L225 Difference]: With dead ends: 75180 [2023-12-02 08:19:51,395 INFO L226 Difference]: Without dead ends: 44234 [2023-12-02 08:19:51,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-12-02 08:19:51,462 INFO L413 NwaCegarLoop]: 2235 mSDtfsCounter, 527 mSDsluCounter, 12751 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 5 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 14986 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:51,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 14986 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1195 Invalid, 7 Unknown, 0 Unchecked, 33.9s Time] [2023-12-02 08:19:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44234 states. [2023-12-02 08:19:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44234 to 31139. [2023-12-02 08:19:53,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31139 states, 19674 states have (on average 1.2947036698180339) internal successors, (25472), 19875 states have internal predecessors, (25472), 8334 states have call successors, (8334), 3069 states have call predecessors, (8334), 3130 states have return successors, (8599), 8322 states have call predecessors, (8599), 8287 states have call successors, (8599) [2023-12-02 08:19:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31139 states to 31139 states and 42405 transitions. [2023-12-02 08:19:53,454 INFO L78 Accepts]: Start accepts. Automaton has 31139 states and 42405 transitions. Word has length 441 [2023-12-02 08:19:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:53,455 INFO L495 AbstractCegarLoop]: Abstraction has 31139 states and 42405 transitions. [2023-12-02 08:19:53,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 3 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2023-12-02 08:19:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 31139 states and 42405 transitions. [2023-12-02 08:19:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2023-12-02 08:19:53,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:53,499 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:53,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 08:19:53,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:53,700 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:53,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash 264611446, now seen corresponding path program 1 times [2023-12-02 08:19:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:53,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229936431] [2023-12-02 08:19:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:53,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2023-12-02 08:19:55,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229936431] [2023-12-02 08:19:55,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229936431] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483802494] [2023-12-02 08:19:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:55,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:55,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:55,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 08:19:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:58,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 6270 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 08:19:58,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 852 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-12-02 08:19:58,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:58,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483802494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:58,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:58,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 08:19:58,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372910820] [2023-12-02 08:19:58,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:58,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:19:58,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:19:58,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:19:58,078 INFO L87 Difference]: Start difference. First operand 31139 states and 42405 transitions. Second operand has 4 states, 3 states have (on average 48.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-12-02 08:20:00,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:20:01,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:20:04,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:20:06,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:20:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:10,579 INFO L93 Difference]: Finished difference Result 62250 states and 84782 transitions. [2023-12-02 08:20:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:20:10,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 48.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 445 [2023-12-02 08:20:10,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:10,664 INFO L225 Difference]: With dead ends: 62250 [2023-12-02 08:20:10,664 INFO L226 Difference]: Without dead ends: 31140 [2023-12-02 08:20:10,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:20:10,726 INFO L413 NwaCegarLoop]: 1440 mSDtfsCounter, 0 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4300 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:10,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4300 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-12-02 08:20:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31140 states. [2023-12-02 08:20:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31140 to 31140. [2023-12-02 08:20:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31140 states, 19675 states have (on average 1.2946886912325286) internal successors, (25473), 19876 states have internal predecessors, (25473), 8334 states have call successors, (8334), 3069 states have call predecessors, (8334), 3130 states have return successors, (8599), 8322 states have call predecessors, (8599), 8287 states have call successors, (8599) [2023-12-02 08:20:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31140 states to 31140 states and 42406 transitions. [2023-12-02 08:20:12,532 INFO L78 Accepts]: Start accepts. Automaton has 31140 states and 42406 transitions. Word has length 445 [2023-12-02 08:20:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:12,532 INFO L495 AbstractCegarLoop]: Abstraction has 31140 states and 42406 transitions. [2023-12-02 08:20:12,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 48.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-12-02 08:20:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 31140 states and 42406 transitions. [2023-12-02 08:20:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-12-02 08:20:12,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:12,576 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:12,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 08:20:12,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:12,777 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:20:12,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash -661353928, now seen corresponding path program 1 times [2023-12-02 08:20:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:12,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049254595] [2023-12-02 08:20:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:12,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2023-12-02 08:20:15,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:15,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049254595] [2023-12-02 08:20:15,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049254595] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:15,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324787946] [2023-12-02 08:20:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:15,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:15,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:15,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656f1097-879f-4862-a44d-10c279d77703/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 08:20:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:18,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 6405 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 08:20:18,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 876 proven. 1 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2023-12-02 08:20:18,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2023-12-02 08:20:18,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324787946] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:18,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393103687] [2023-12-02 08:20:18,953 INFO L159 IcfgInterpreter]: Started Sifa with 214 locations of interest [2023-12-02 08:20:18,953 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:18,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:18,963 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:18,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:22:30,580 WARN L293 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 4811 DAG size of output: 4793 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 08:22:48,000 WARN L293 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 4811 DAG size of output: 4793 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 08:25:19,869 WARN L293 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 4592 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 08:26:15,330 WARN L293 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 4602 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 08:28:17,624 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 4809 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 08:28:25,101 WARN L293 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 4810 DAG size of output: 4810 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 08:28:42,421 WARN L293 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 4810 DAG size of output: 4810 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)