./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--char--lp.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--char--lp.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 96a9bd06c2a0348ab1a93991deedda2ae571d70e4f7fb0e32175d69384f432c0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:07:03,783 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:07:03,921 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:07:03,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:07:03,931 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:07:03,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:07:03,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:07:03,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:07:03,983 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:07:03,989 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:07:03,990 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:07:03,992 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:07:03,993 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:07:03,995 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:07:03,995 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:07:03,996 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:07:03,997 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:07:03,997 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:07:03,998 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:07:03,999 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:07:03,999 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:07:04,000 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:07:04,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:07:04,003 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:07:04,004 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:07:04,004 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:07:04,005 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:07:04,006 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:07:04,006 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:07:04,007 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:07:04,009 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:07:04,009 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:07:04,010 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:07:04,010 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:07:04,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:07:04,011 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:07:04,011 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:07:04,012 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:07:04,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:07:04,013 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:07:04,013 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:07:04,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:07:04,014 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_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96a9bd06c2a0348ab1a93991deedda2ae571d70e4f7fb0e32175d69384f432c0 [2023-11-19 05:07:04,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:07:04,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:07:04,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:07:04,393 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:07:04,394 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:07:04,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--char--lp.ko-entry_point.cil.out.i [2023-11-19 05:07:08,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:07:08,685 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:07:08,687 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--char--lp.ko-entry_point.cil.out.i [2023-11-19 05:07:08,744 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/data/5454b13e4/747085f1175d4cea89d6d064308c0da6/FLAG8eb896c27 [2023-11-19 05:07:08,767 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/data/5454b13e4/747085f1175d4cea89d6d064308c0da6 [2023-11-19 05:07:08,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:07:08,778 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:07:08,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:07:08,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:07:08,788 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:07:08,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:07:08" (1/1) ... [2023-11-19 05:07:08,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558da1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:08, skipping insertion in model container [2023-11-19 05:07:08,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:07:08" (1/1) ... [2023-11-19 05:07:08,938 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:07:10,625 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_2e8781ed-a264-4089-83b0-e41fb86d319c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--char--lp.ko-entry_point.cil.out.i[147706,147719] [2023-11-19 05:07:10,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:07:10,926 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:07:11,048 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [3376] [2023-11-19 05:07:11,051 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [3384-3385] [2023-11-19 05:07:11,052 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [3393-3394] [2023-11-19 05:07:11,052 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("bt %2,%1\n\tsbb %0,%0": "=r" (oldbit): "m" (*((unsigned long *)addr)), "Ir" (nr)); [3402-3403] [2023-11-19 05:07:11,054 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [3421] [2023-11-19 05:07:11,054 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3424] [2023-11-19 05:07:11,055 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3427] [2023-11-19 05:07:11,055 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3430] [2023-11-19 05:07:11,066 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& cpu_tss.x86_tss.sp0)); [3451] [2023-11-19 05:07:11,067 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& cpu_tss.x86_tss.sp0)); [3454] [2023-11-19 05:07:11,067 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& cpu_tss.x86_tss.sp0)); [3457] [2023-11-19 05:07:11,068 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& cpu_tss.x86_tss.sp0)); [3460] [2023-11-19 05:07:11,310 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_2e8781ed-a264-4089-83b0-e41fb86d319c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--char--lp.ko-entry_point.cil.out.i[147706,147719] [2023-11-19 05:07:11,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:07:11,440 WARN L675 CHandler]: The function strncmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:07:11,440 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:07:11,441 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:07:11,450 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:07:11,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11 WrapperNode [2023-11-19 05:07:11,452 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:07:11,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:07:11,454 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:07:11,454 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:07:11,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,754 INFO L138 Inliner]: procedures = 222, calls = 892, calls flagged for inlining = 80, calls inlined = 75, statements flattened = 2700 [2023-11-19 05:07:11,755 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:07:11,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:07:11,756 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:07:11,756 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:07:11,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,814 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,924 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,966 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:11,986 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:12,102 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:07:12,106 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:07:12,107 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:07:12,107 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:07:12,108 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (1/1) ... [2023-11-19 05:07:12,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:07:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:12,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:07:12,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:07:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_port_mutex_of_lp_struct [2023-11-19 05:07:12,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_port_mutex_of_lp_struct [2023-11-19 05:07:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2023-11-19 05:07:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure lp_error [2023-11-19 05:07:12,215 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_error [2023-11-19 05:07:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 05:07:12,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 05:07:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 05:07:12,217 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 05:07:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure lp_register [2023-11-19 05:07:12,217 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_register [2023-11-19 05:07:12,218 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2023-11-19 05:07:12,219 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2023-11-19 05:07:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-19 05:07:12,220 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-19 05:07:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure lp_release_parport [2023-11-19 05:07:12,223 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_release_parport [2023-11-19 05:07:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:07:12,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:07:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-19 05:07:12,224 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-19 05:07:12,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:07:12,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:07:12,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:07:12,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:07:12,227 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-19 05:07:12,227 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-19 05:07:12,227 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2023-11-19 05:07:12,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2023-11-19 05:07:12,227 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_port_mutex_of_lp_struct [2023-11-19 05:07:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_port_mutex_of_lp_struct [2023-11-19 05:07:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:07:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure lp_set_timeout [2023-11-19 05:07:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_set_timeout [2023-11-19 05:07:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure lp_reset [2023-11-19 05:07:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_reset [2023-11-19 05:07:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_25 [2023-11-19 05:07:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_25 [2023-11-19 05:07:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:07:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-19 05:07:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-19 05:07:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-11-19 05:07:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-11-19 05:07:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-19 05:07:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-19 05:07:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure parport_write [2023-11-19 05:07:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure parport_write [2023-11-19 05:07:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:07:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:07:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 05:07:12,234 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 05:07:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-11-19 05:07:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-11-19 05:07:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lp_mutex [2023-11-19 05:07:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lp_mutex [2023-11-19 05:07:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure test_ti_thread_flag [2023-11-19 05:07:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure test_ti_thread_flag [2023-11-19 05:07:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure parport_negotiate [2023-11-19 05:07:12,236 INFO L138 BoogieDeclarations]: Found implementation of procedure parport_negotiate [2023-11-19 05:07:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure parport_release [2023-11-19 05:07:12,237 INFO L138 BoogieDeclarations]: Found implementation of procedure parport_release [2023-11-19 05:07:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_console [2023-11-19 05:07:12,237 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_console [2023-11-19 05:07:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure parport_set_timeout [2023-11-19 05:07:12,237 INFO L138 BoogieDeclarations]: Found implementation of procedure parport_set_timeout [2023-11-19 05:07:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:07:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure parport_claim_or_block [2023-11-19 05:07:12,238 INFO L138 BoogieDeclarations]: Found implementation of procedure parport_claim_or_block [2023-11-19 05:07:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure lp_do_ioctl [2023-11-19 05:07:12,238 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_do_ioctl [2023-11-19 05:07:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2023-11-19 05:07:12,239 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2023-11-19 05:07:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:07:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2023-11-19 05:07:12,240 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2023-11-19 05:07:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 05:07:12,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 05:07:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 05:07:12,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 05:07:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure lp_claim_parport_or_block [2023-11-19 05:07:12,242 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_claim_parport_or_block [2023-11-19 05:07:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure compat_ptr [2023-11-19 05:07:12,242 INFO L138 BoogieDeclarations]: Found implementation of procedure compat_ptr [2023-11-19 05:07:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:07:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-11-19 05:07:12,243 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-11-19 05:07:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2023-11-19 05:07:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-19 05:07:12,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-19 05:07:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-11-19 05:07:12,244 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-11-19 05:07:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:07:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-19 05:07:12,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-19 05:07:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:07:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-19 05:07:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure lp_detach [2023-11-19 05:07:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_detach [2023-11-19 05:07:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lp_mutex [2023-11-19 05:07:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lp_mutex [2023-11-19 05:07:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2023-11-19 05:07:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2023-11-19 05:07:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure lp_negotiate [2023-11-19 05:07:12,249 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_negotiate [2023-11-19 05:07:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2023-11-19 05:07:12,249 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2023-11-19 05:07:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-11-19 05:07:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-11-19 05:07:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure lp_wait_ready [2023-11-19 05:07:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_wait_ready [2023-11-19 05:07:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-19 05:07:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-19 05:07:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2023-11-19 05:07:12,251 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2023-11-19 05:07:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:07:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure lp_write [2023-11-19 05:07:12,251 INFO L138 BoogieDeclarations]: Found implementation of procedure lp_write [2023-11-19 05:07:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2023-11-19 05:07:12,252 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2023-11-19 05:07:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-19 05:07:12,253 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-19 05:07:12,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:07:12,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:07:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure parport_yield_blocking [2023-11-19 05:07:12,254 INFO L138 BoogieDeclarations]: Found implementation of procedure parport_yield_blocking [2023-11-19 05:07:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-19 05:07:12,254 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-19 05:07:12,855 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:07:12,863 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:07:13,181 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 05:07:15,253 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:07:16,465 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:07:16,466 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:07:16,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:07:16 BoogieIcfgContainer [2023-11-19 05:07:16,484 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:07:16,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:07:16,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:07:16,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:07:16,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:07:08" (1/3) ... [2023-11-19 05:07:16,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e945f7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:07:16, skipping insertion in model container [2023-11-19 05:07:16,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:11" (2/3) ... [2023-11-19 05:07:16,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e945f7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:07:16, skipping insertion in model container [2023-11-19 05:07:16,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:07:16" (3/3) ... [2023-11-19 05:07:16,502 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--char--lp.ko-entry_point.cil.out.i [2023-11-19 05:07:16,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:07:16,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:07:16,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:07:16,643 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;@3efaecdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:07:16,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:07:16,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 690 states, 430 states have (on average 1.372093023255814) internal successors, (590), 452 states have internal predecessors, (590), 203 states have call successors, (203), 56 states have call predecessors, (203), 55 states have return successors, (198), 198 states have call predecessors, (198), 198 states have call successors, (198) [2023-11-19 05:07:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-19 05:07:16,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:16,678 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:16,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:16,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1491969163, now seen corresponding path program 1 times [2023-11-19 05:07:16,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:16,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922843831] [2023-11-19 05:07:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-11-19 05:07:17,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:17,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922843831] [2023-11-19 05:07:17,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922843831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:17,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:17,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:07:17,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34312650] [2023-11-19 05:07:17,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:07:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:17,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:07:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:07:17,946 INFO L87 Difference]: Start difference. First operand has 690 states, 430 states have (on average 1.372093023255814) internal successors, (590), 452 states have internal predecessors, (590), 203 states have call successors, (203), 56 states have call predecessors, (203), 55 states have return successors, (198), 198 states have call predecessors, (198), 198 states have call successors, (198) Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-19 05:07:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:20,379 INFO L93 Difference]: Finished difference Result 1920 states and 2918 transitions. [2023-11-19 05:07:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:07:20,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 136 [2023-11-19 05:07:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:20,405 INFO L225 Difference]: With dead ends: 1920 [2023-11-19 05:07:20,405 INFO L226 Difference]: Without dead ends: 1238 [2023-11-19 05:07:20,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:07:20,421 INFO L413 NwaCegarLoop]: 1196 mSDtfsCounter, 1765 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:20,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 3361 Invalid, 913 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [241 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 05:07:20,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2023-11-19 05:07:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 685. [2023-11-19 05:07:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 432 states have (on average 1.3541666666666667) internal successors, (585), 447 states have internal predecessors, (585), 198 states have call successors, (198), 55 states have call predecessors, (198), 54 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-19 05:07:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 972 transitions. [2023-11-19 05:07:20,560 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 972 transitions. Word has length 136 [2023-11-19 05:07:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:20,562 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 972 transitions. [2023-11-19 05:07:20,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-19 05:07:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 972 transitions. [2023-11-19 05:07:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-19 05:07:20,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:20,567 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:20,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:07:20,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:20,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:20,569 INFO L85 PathProgramCache]: Analyzing trace with hash -291804714, now seen corresponding path program 1 times [2023-11-19 05:07:20,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:20,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669311654] [2023-11-19 05:07:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:20,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-11-19 05:07:20,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:20,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669311654] [2023-11-19 05:07:20,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669311654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:20,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:20,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:20,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84054839] [2023-11-19 05:07:20,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:20,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:20,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:20,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:20,913 INFO L87 Difference]: Start difference. First operand 685 states and 972 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:21,553 INFO L93 Difference]: Finished difference Result 1551 states and 2181 transitions. [2023-11-19 05:07:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 139 [2023-11-19 05:07:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:21,564 INFO L225 Difference]: With dead ends: 1551 [2023-11-19 05:07:21,564 INFO L226 Difference]: Without dead ends: 900 [2023-11-19 05:07:21,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:21,575 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 331 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:21,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1606 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:07:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2023-11-19 05:07:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 878. [2023-11-19 05:07:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 567 states have (on average 1.3615520282186948) internal successors, (772), 584 states have internal predecessors, (772), 233 states have call successors, (233), 78 states have call predecessors, (233), 77 states have return successors, (224), 223 states have call predecessors, (224), 224 states have call successors, (224) [2023-11-19 05:07:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1229 transitions. [2023-11-19 05:07:21,725 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1229 transitions. Word has length 139 [2023-11-19 05:07:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:21,728 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1229 transitions. [2023-11-19 05:07:21,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1229 transitions. [2023-11-19 05:07:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-19 05:07:21,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:21,734 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:21,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:07:21,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:21,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1359428313, now seen corresponding path program 1 times [2023-11-19 05:07:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:21,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700808349] [2023-11-19 05:07:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:21,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-11-19 05:07:22,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:22,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700808349] [2023-11-19 05:07:22,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700808349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:22,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:22,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:22,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056550451] [2023-11-19 05:07:22,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:22,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:22,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:22,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:22,197 INFO L87 Difference]: Start difference. First operand 878 states and 1229 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:07:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:23,205 INFO L93 Difference]: Finished difference Result 2465 states and 3446 transitions. [2023-11-19 05:07:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:23,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 141 [2023-11-19 05:07:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:23,220 INFO L225 Difference]: With dead ends: 2465 [2023-11-19 05:07:23,220 INFO L226 Difference]: Without dead ends: 1621 [2023-11-19 05:07:23,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:23,226 INFO L413 NwaCegarLoop]: 917 mSDtfsCounter, 880 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:23,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 1695 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:07:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2023-11-19 05:07:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1615. [2023-11-19 05:07:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1045 states have (on average 1.3607655502392344) internal successors, (1422), 1069 states have internal predecessors, (1422), 421 states have call successors, (421), 149 states have call predecessors, (421), 148 states have return successors, (412), 411 states have call predecessors, (412), 412 states have call successors, (412) [2023-11-19 05:07:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2255 transitions. [2023-11-19 05:07:23,348 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2255 transitions. Word has length 141 [2023-11-19 05:07:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:23,349 INFO L495 AbstractCegarLoop]: Abstraction has 1615 states and 2255 transitions. [2023-11-19 05:07:23,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:07:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2255 transitions. [2023-11-19 05:07:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-19 05:07:23,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:23,352 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:23,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:07:23,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:23,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash -43509290, now seen corresponding path program 1 times [2023-11-19 05:07:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:23,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252329385] [2023-11-19 05:07:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-11-19 05:07:23,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:23,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252329385] [2023-11-19 05:07:23,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252329385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:23,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:23,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710770803] [2023-11-19 05:07:23,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:23,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:23,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:23,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:23,671 INFO L87 Difference]: Start difference. First operand 1615 states and 2255 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:24,454 INFO L93 Difference]: Finished difference Result 1617 states and 2256 transitions. [2023-11-19 05:07:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:24,455 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 142 [2023-11-19 05:07:24,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:24,473 INFO L225 Difference]: With dead ends: 1617 [2023-11-19 05:07:24,473 INFO L226 Difference]: Without dead ends: 1614 [2023-11-19 05:07:24,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:24,480 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 916 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:24,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 837 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:07:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2023-11-19 05:07:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1614. [2023-11-19 05:07:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1045 states have (on average 1.3598086124401914) internal successors, (1421), 1068 states have internal predecessors, (1421), 420 states have call successors, (420), 149 states have call predecessors, (420), 148 states have return successors, (412), 411 states have call predecessors, (412), 412 states have call successors, (412) [2023-11-19 05:07:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2253 transitions. [2023-11-19 05:07:24,628 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2253 transitions. Word has length 142 [2023-11-19 05:07:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:24,629 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2253 transitions. [2023-11-19 05:07:24,630 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2253 transitions. [2023-11-19 05:07:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 05:07:24,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:24,634 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:24,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:07:24,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:24,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1349065613, now seen corresponding path program 1 times [2023-11-19 05:07:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:24,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566009107] [2023-11-19 05:07:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:24,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-11-19 05:07:24,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:24,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566009107] [2023-11-19 05:07:24,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566009107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:24,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:24,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462132775] [2023-11-19 05:07:24,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:24,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:24,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:24,943 INFO L87 Difference]: Start difference. First operand 1614 states and 2253 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:25,653 INFO L93 Difference]: Finished difference Result 1616 states and 2254 transitions. [2023-11-19 05:07:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:25,654 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 143 [2023-11-19 05:07:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:25,666 INFO L225 Difference]: With dead ends: 1616 [2023-11-19 05:07:25,666 INFO L226 Difference]: Without dead ends: 1613 [2023-11-19 05:07:25,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:25,669 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 913 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:25,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 835 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:07:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2023-11-19 05:07:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2023-11-19 05:07:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1045 states have (on average 1.3588516746411483) internal successors, (1420), 1067 states have internal predecessors, (1420), 419 states have call successors, (419), 149 states have call predecessors, (419), 148 states have return successors, (412), 411 states have call predecessors, (412), 412 states have call successors, (412) [2023-11-19 05:07:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2251 transitions. [2023-11-19 05:07:25,812 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2251 transitions. Word has length 143 [2023-11-19 05:07:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:25,812 INFO L495 AbstractCegarLoop]: Abstraction has 1613 states and 2251 transitions. [2023-11-19 05:07:25,813 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2251 transitions. [2023-11-19 05:07:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:07:25,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:25,817 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:25,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:07:25,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:25,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1128366201, now seen corresponding path program 1 times [2023-11-19 05:07:25,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:25,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248806079] [2023-11-19 05:07:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:25,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-11-19 05:07:26,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:26,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248806079] [2023-11-19 05:07:26,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248806079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:26,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:26,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:26,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285995795] [2023-11-19 05:07:26,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:26,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:26,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:26,147 INFO L87 Difference]: Start difference. First operand 1613 states and 2251 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:27,110 INFO L93 Difference]: Finished difference Result 1797 states and 2431 transitions. [2023-11-19 05:07:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 144 [2023-11-19 05:07:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:27,125 INFO L225 Difference]: With dead ends: 1797 [2023-11-19 05:07:27,126 INFO L226 Difference]: Without dead ends: 1793 [2023-11-19 05:07:27,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:27,128 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 716 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:27,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1071 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:07:27,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2023-11-19 05:07:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1789. [2023-11-19 05:07:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1139 states have (on average 1.3353819139596137) internal successors, (1521), 1159 states have internal predecessors, (1521), 453 states have call successors, (453), 197 states have call predecessors, (453), 196 states have return successors, (448), 447 states have call predecessors, (448), 448 states have call successors, (448) [2023-11-19 05:07:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 2422 transitions. [2023-11-19 05:07:27,331 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 2422 transitions. Word has length 144 [2023-11-19 05:07:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:27,336 INFO L495 AbstractCegarLoop]: Abstraction has 1789 states and 2422 transitions. [2023-11-19 05:07:27,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 2422 transitions. [2023-11-19 05:07:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-19 05:07:27,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:27,340 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:27,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:07:27,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:27,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash 619345974, now seen corresponding path program 1 times [2023-11-19 05:07:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:27,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201520942] [2023-11-19 05:07:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-11-19 05:07:27,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:27,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201520942] [2023-11-19 05:07:27,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201520942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:27,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:27,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:27,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952495963] [2023-11-19 05:07:27,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:27,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:27,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:27,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:27,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:27,629 INFO L87 Difference]: Start difference. First operand 1789 states and 2422 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:28,280 INFO L93 Difference]: Finished difference Result 1791 states and 2423 transitions. [2023-11-19 05:07:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:28,281 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), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 145 [2023-11-19 05:07:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:28,296 INFO L225 Difference]: With dead ends: 1791 [2023-11-19 05:07:28,296 INFO L226 Difference]: Without dead ends: 1788 [2023-11-19 05:07:28,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:28,299 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 905 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:28,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 829 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:07:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2023-11-19 05:07:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1788. [2023-11-19 05:07:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1139 states have (on average 1.334503950834065) internal successors, (1520), 1158 states have internal predecessors, (1520), 452 states have call successors, (452), 197 states have call predecessors, (452), 196 states have return successors, (448), 447 states have call predecessors, (448), 448 states have call successors, (448) [2023-11-19 05:07:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2420 transitions. [2023-11-19 05:07:28,520 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2420 transitions. Word has length 145 [2023-11-19 05:07:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:28,521 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2420 transitions. [2023-11-19 05:07:28,521 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), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2420 transitions. [2023-11-19 05:07:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-19 05:07:28,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:28,525 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:28,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:07:28,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:28,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2019592988, now seen corresponding path program 1 times [2023-11-19 05:07:28,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:28,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208246285] [2023-11-19 05:07:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-11-19 05:07:28,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:28,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208246285] [2023-11-19 05:07:28,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208246285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:28,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:28,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:28,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555376304] [2023-11-19 05:07:28,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:28,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:28,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:28,857 INFO L87 Difference]: Start difference. First operand 1788 states and 2420 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:29,873 INFO L93 Difference]: Finished difference Result 3095 states and 4177 transitions. [2023-11-19 05:07:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:29,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 146 [2023-11-19 05:07:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:29,895 INFO L225 Difference]: With dead ends: 3095 [2023-11-19 05:07:29,895 INFO L226 Difference]: Without dead ends: 3073 [2023-11-19 05:07:29,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:29,899 INFO L413 NwaCegarLoop]: 842 mSDtfsCounter, 627 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:29,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1604 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:07:29,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2023-11-19 05:07:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 3070. [2023-11-19 05:07:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 1979 states have (on average 1.33855482566953) internal successors, (2649), 2005 states have internal predecessors, (2649), 741 states have call successors, (741), 354 states have call predecessors, (741), 349 states have return successors, (753), 730 states have call predecessors, (753), 737 states have call successors, (753) [2023-11-19 05:07:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4143 transitions. [2023-11-19 05:07:30,346 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4143 transitions. Word has length 146 [2023-11-19 05:07:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:30,346 INFO L495 AbstractCegarLoop]: Abstraction has 3070 states and 4143 transitions. [2023-11-19 05:07:30,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:07:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4143 transitions. [2023-11-19 05:07:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-19 05:07:30,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:30,353 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2023-11-19 05:07:30,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:07:30,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:30,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash 106616354, now seen corresponding path program 1 times [2023-11-19 05:07:30,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:30,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119291312] [2023-11-19 05:07:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-11-19 05:07:30,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119291312] [2023-11-19 05:07:30,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119291312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:30,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:30,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:30,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190763260] [2023-11-19 05:07:30,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:30,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:30,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:30,712 INFO L87 Difference]: Start difference. First operand 3070 states and 4143 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-19 05:07:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:31,720 INFO L93 Difference]: Finished difference Result 6114 states and 8251 transitions. [2023-11-19 05:07:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 194 [2023-11-19 05:07:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:31,745 INFO L225 Difference]: With dead ends: 6114 [2023-11-19 05:07:31,745 INFO L226 Difference]: Without dead ends: 3078 [2023-11-19 05:07:31,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:31,757 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:31,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1657 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:07:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2023-11-19 05:07:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 3072. [2023-11-19 05:07:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 1981 states have (on average 1.3382130237253913) internal successors, (2651), 2007 states have internal predecessors, (2651), 741 states have call successors, (741), 354 states have call predecessors, (741), 349 states have return successors, (753), 730 states have call predecessors, (753), 737 states have call successors, (753) [2023-11-19 05:07:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 4145 transitions. [2023-11-19 05:07:32,117 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 4145 transitions. Word has length 194 [2023-11-19 05:07:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:32,117 INFO L495 AbstractCegarLoop]: Abstraction has 3072 states and 4145 transitions. [2023-11-19 05:07:32,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-19 05:07:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 4145 transitions. [2023-11-19 05:07:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-19 05:07:32,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:32,125 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2023-11-19 05:07:32,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:07:32,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:32,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1504244454, now seen corresponding path program 1 times [2023-11-19 05:07:32,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:32,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049609462] [2023-11-19 05:07:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:32,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-11-19 05:07:32,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:32,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049609462] [2023-11-19 05:07:32,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049609462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:07:32,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153983432] [2023-11-19 05:07:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:32,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:32,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:32,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:07:32,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:07:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:33,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 2300 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:07:33,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:07:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-11-19 05:07:33,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:07:33,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153983432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:33,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:07:33,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 05:07:33,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270120749] [2023-11-19 05:07:33,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:33,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:33,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:33,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:07:33,449 INFO L87 Difference]: Start difference. First operand 3072 states and 4145 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-19 05:07:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:34,358 INFO L93 Difference]: Finished difference Result 4910 states and 6599 transitions. [2023-11-19 05:07:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:34,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 202 [2023-11-19 05:07:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:34,372 INFO L225 Difference]: With dead ends: 4910 [2023-11-19 05:07:34,372 INFO L226 Difference]: Without dead ends: 1870 [2023-11-19 05:07:34,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:07:34,382 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 9 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:07:34,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1662 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:07:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2023-11-19 05:07:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1854. [2023-11-19 05:07:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1196 states have (on average 1.334448160535117) internal successors, (1596), 1213 states have internal predecessors, (1596), 441 states have call successors, (441), 219 states have call predecessors, (441), 216 states have return successors, (445), 433 states have call predecessors, (445), 437 states have call successors, (445) [2023-11-19 05:07:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2482 transitions. [2023-11-19 05:07:34,546 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2482 transitions. Word has length 202 [2023-11-19 05:07:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:34,548 INFO L495 AbstractCegarLoop]: Abstraction has 1854 states and 2482 transitions. [2023-11-19 05:07:34,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-19 05:07:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2482 transitions. [2023-11-19 05:07:34,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-19 05:07:34,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:34,554 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2023-11-19 05:07:34,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:07:34,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:07:34,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:07:34,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash -368175906, now seen corresponding path program 1 times [2023-11-19 05:07:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:34,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997275827] [2023-11-19 05:07:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-11-19 05:07:35,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:35,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997275827] [2023-11-19 05:07:35,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997275827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:07:35,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226132488] [2023-11-19 05:07:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:35,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:35,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:35,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:07:35,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8781ed-a264-4089-83b0-e41fb86d319c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:07:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:36,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 2372 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:07:36,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:07:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 183 proven. 1 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-19 05:07:36,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:07:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-11-19 05:07:36,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226132488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:07:36,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885336817] [2023-11-19 05:07:36,385 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2023-11-19 05:07:36,385 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:07:36,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:07:36,395 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:07:36,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs