./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--input--serio--serio_raw.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX --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 b1b2a361b7351c4ac2fc0213f47206309b2fae43ca25ec3cefac8a1c8b001422 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:53,704 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:53,811 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 01:00:53,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:53,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:53,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:53,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:53,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:53,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:53,853 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:53,853 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:53,854 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:53,854 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:53,856 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:53,857 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:53,857 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:53,858 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:53,858 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:53,859 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:53,859 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:53,860 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:53,860 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:53,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:53,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:00:53,862 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:53,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:53,863 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:00:53,863 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:53,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:00:53,864 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:00:53,865 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:53,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:53,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:53,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:53,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:53,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:53,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:00:53,867 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:53,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:53,867 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:00:53,867 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:53,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:53,869 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_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1b2a361b7351c4ac2fc0213f47206309b2fae43ca25ec3cefac8a1c8b001422 [2023-11-12 01:00:54,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:54,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:54,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:54,274 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:54,275 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:54,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i [2023-11-12 01:00:57,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:57,839 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:57,839 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i [2023-11-12 01:00:57,881 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/data/e0e547264/2e92c2a3965a4181a24da41bcc81d132/FLAG2d0c46598 [2023-11-12 01:00:57,897 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/data/e0e547264/2e92c2a3965a4181a24da41bcc81d132 [2023-11-12 01:00:57,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:57,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:57,903 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:57,903 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:57,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:57,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:57" (1/1) ... [2023-11-12 01:00:57,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634c9d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:57, skipping insertion in model container [2023-11-12 01:00:57,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:57" (1/1) ... [2023-11-12 01:00:58,038 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:59,278 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_12022fe7-6f25-4a85-b58d-b0a1848e7db0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i[129978,129991] [2023-11-12 01:00:59,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:59,517 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:59,636 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; subl %2, %0; sete %1": "+m" (v->counter), "=qm" (c): "er" (i): "memory"); [3226-3227] [2023-11-12 01:00:59,638 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; xaddb %b0, %1\n": "+q" (__ret), "+m" (v->counter): : "memory", "cc"); [3238-3239] [2023-11-12 01:00:59,639 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; xaddw %w0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3242-3243] [2023-11-12 01:00:59,640 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; xaddl %0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3246-3247] [2023-11-12 01:00:59,641 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; xaddq %q0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3250-3251] [2023-11-12 01:00:59,680 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp): "ebx"); [3767] [2023-11-12 01:00:59,683 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp___0): "ebx"); [3772] [2023-11-12 01:00:59,684 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp___1): "ebx"); [3777] [2023-11-12 01:00:59,685 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp___2): "ebx"); [3782] [2023-11-12 01:00:59,686 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp___3): "ebx"); [3787] [2023-11-12 01:00:59,697 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu), "=r" (__val_gu): "0" (tmp), "i" (1UL)); [3886-3887] [2023-11-12 01:00:59,827 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_12022fe7-6f25-4a85-b58d-b0a1848e7db0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i[129978,129991] [2023-11-12 01:00:59,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:59,960 WARN L672 CHandler]: The function __xadd_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:59,968 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:59,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59 WrapperNode [2023-11-12 01:00:59,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:59,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:59,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:59,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:59,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,180 INFO L138 Inliner]: procedures = 188, calls = 552, calls flagged for inlining = 73, calls inlined = 68, statements flattened = 1631 [2023-11-12 01:01:00,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:00,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:01:00,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:01:00,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:01:00,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,217 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,224 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,319 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,328 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,338 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:01:00,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:01:00,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:01:00,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:01:00,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (1/1) ... [2023-11-12 01:01:00,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:00,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:00,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:01:00,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:01:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_serio_raw_mutex [2023-11-12 01:01:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_serio_raw_mutex [2023-11-12 01:01:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2023-11-12 01:01:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2023-11-12 01:01:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-12 01:01:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-12 01:01:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:01:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-12 01:01:00,438 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-12 01:01:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 01:01:00,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 01:01:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-12 01:01:00,439 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-12 01:01:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure kill_fasync [2023-11-12 01:01:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_fasync [2023-11-12 01:01:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-12 01:01:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-12 01:01:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-12 01:01:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-12 01:01:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:01:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-12 01:01:00,441 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-12 01:01:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 01:01:00,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 01:01:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-12 01:01:00,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-12 01:01:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2023-11-12 01:01:00,442 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2023-11-12 01:01:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-12 01:01:00,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-12 01:01:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_disconnect [2023-11-12 01:01:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_disconnect [2023-11-12 01:01:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure serio_continue_rx [2023-11-12 01:01:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_continue_rx [2023-11-12 01:01:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-12 01:01:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-12 01:01:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:01:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:01:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:01:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_poll [2023-11-12 01:01:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_poll [2023-11-12 01:01:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-12 01:01:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-12 01:01:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-12 01:01:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-12 01:01:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:01:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-12 01:01:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-12 01:01:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:01:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure serio_set_drvdata [2023-11-12 01:01:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_set_drvdata [2023-11-12 01:01:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:01:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-12 01:01:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-12 01:01:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 01:01:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 01:01:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2023-11-12 01:01:00,447 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2023-11-12 01:01:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:01:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-12 01:01:00,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-12 01:01:00,450 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2023-11-12 01:01:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure serio_pause_rx [2023-11-12 01:01:00,451 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_pause_rx [2023-11-12 01:01:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-12 01:01:00,451 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-12 01:01:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add_return [2023-11-12 01:01:00,452 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add_return [2023-11-12 01:01:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:01:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 01:01:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2023-11-12 01:01:00,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2023-11-12 01:01:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure serio_get_drvdata [2023-11-12 01:01:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_get_drvdata [2023-11-12 01:01:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-12 01:01:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-12 01:01:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_serio_raw_mutex [2023-11-12 01:01:00,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_serio_raw_mutex [2023-11-12 01:01:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-11-12 01:01:00,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-11-12 01:01:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-12 01:01:00,454 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-12 01:01:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure serio_close [2023-11-12 01:01:00,454 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_close [2023-11-12 01:01:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_serio_raw_mutex [2023-11-12 01:01:00,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_serio_raw_mutex [2023-11-12 01:01:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:01:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_write [2023-11-12 01:01:00,455 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_write [2023-11-12 01:01:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_fasync [2023-11-12 01:01:00,456 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_fasync [2023-11-12 01:01:00,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:01:00,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:01:00,828 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:01:00,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:01:01,036 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-12 01:01:02,459 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:01:02,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:01:02,972 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:01:02,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:02 BoogieIcfgContainer [2023-11-12 01:01:02,976 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:01:02,979 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:01:02,979 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:01:02,982 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:01:02,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:57" (1/3) ... [2023-11-12 01:01:02,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb7b509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:02, skipping insertion in model container [2023-11-12 01:01:02,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:59" (2/3) ... [2023-11-12 01:01:02,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb7b509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:02, skipping insertion in model container [2023-11-12 01:01:02,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:02" (3/3) ... [2023-11-12 01:01:02,985 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i [2023-11-12 01:01:03,007 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:01:03,007 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:01:03,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:01:03,079 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;@65b97e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:01:03,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:01:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 248 states have (on average 1.3669354838709677) internal successors, (339), 269 states have internal predecessors, (339), 115 states have call successors, (115), 40 states have call predecessors, (115), 39 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-12 01:01:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:03,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:03,105 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 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] [2023-11-12 01:01:03,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:03,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1571278221, now seen corresponding path program 1 times [2023-11-12 01:01:03,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223173359] [2023-11-12 01:01:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:03,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-12 01:01:04,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223173359] [2023-11-12 01:01:04,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223173359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:04,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:04,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:04,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161333393] [2023-11-12 01:01:04,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:04,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:04,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:04,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:04,096 INFO L87 Difference]: Start difference. First operand has 404 states, 248 states have (on average 1.3669354838709677) internal successors, (339), 269 states have internal predecessors, (339), 115 states have call successors, (115), 40 states have call predecessors, (115), 39 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 01:01:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:04,717 INFO L93 Difference]: Finished difference Result 1130 states and 1609 transitions. [2023-11-12 01:01:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:04,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 123 [2023-11-12 01:01:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:04,754 INFO L225 Difference]: With dead ends: 1130 [2023-11-12 01:01:04,754 INFO L226 Difference]: Without dead ends: 746 [2023-11-12 01:01:04,770 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 [2023-11-12 01:01:04,782 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 485 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:04,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 958 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-12 01:01:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 740. [2023-11-12 01:01:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 465 states have (on average 1.346236559139785) internal successors, (626), 488 states have internal predecessors, (626), 199 states have call successors, (199), 76 states have call predecessors, (199), 75 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-12 01:01:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1016 transitions. [2023-11-12 01:01:04,970 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1016 transitions. Word has length 123 [2023-11-12 01:01:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:04,972 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1016 transitions. [2023-11-12 01:01:04,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 01:01:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1016 transitions. [2023-11-12 01:01:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-12 01:01:04,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:04,984 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 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] [2023-11-12 01:01:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:01:04,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:04,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash 672028453, now seen corresponding path program 1 times [2023-11-12 01:01:04,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:04,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288199021] [2023-11-12 01:01:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:04,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-12 01:01:05,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288199021] [2023-11-12 01:01:05,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288199021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:05,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:05,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295668706] [2023-11-12 01:01:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:05,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:05,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:05,295 INFO L87 Difference]: Start difference. First operand 740 states and 1016 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 01:01:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:05,656 INFO L93 Difference]: Finished difference Result 742 states and 1017 transitions. [2023-11-12 01:01:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:05,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 127 [2023-11-12 01:01:05,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:05,668 INFO L225 Difference]: With dead ends: 742 [2023-11-12 01:01:05,668 INFO L226 Difference]: Without dead ends: 739 [2023-11-12 01:01:05,669 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 [2023-11-12 01:01:05,676 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 503 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:05,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 465 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:01:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-11-12 01:01:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 739. [2023-11-12 01:01:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 465 states have (on average 1.3440860215053763) internal successors, (625), 487 states have internal predecessors, (625), 198 states have call successors, (198), 76 states have call predecessors, (198), 75 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-12 01:01:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1014 transitions. [2023-11-12 01:01:05,760 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1014 transitions. Word has length 127 [2023-11-12 01:01:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:05,763 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 1014 transitions. [2023-11-12 01:01:05,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 01:01:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1014 transitions. [2023-11-12 01:01:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-12 01:01:05,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:05,775 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 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] [2023-11-12 01:01:05,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:01:05,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:05,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash -642072797, now seen corresponding path program 1 times [2023-11-12 01:01:05,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:05,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042525019] [2023-11-12 01:01:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:05,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-12 01:01:06,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:06,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042525019] [2023-11-12 01:01:06,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042525019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:06,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:06,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294457412] [2023-11-12 01:01:06,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:06,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:06,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:06,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:06,121 INFO L87 Difference]: Start difference. First operand 739 states and 1014 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 01:01:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:06,407 INFO L93 Difference]: Finished difference Result 741 states and 1015 transitions. [2023-11-12 01:01:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:06,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 128 [2023-11-12 01:01:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:06,414 INFO L225 Difference]: With dead ends: 741 [2023-11-12 01:01:06,415 INFO L226 Difference]: Without dead ends: 738 [2023-11-12 01:01:06,416 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 [2023-11-12 01:01:06,420 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 500 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:06,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 463 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:06,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2023-11-12 01:01:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 738. [2023-11-12 01:01:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 465 states have (on average 1.3419354838709678) internal successors, (624), 486 states have internal predecessors, (624), 197 states have call successors, (197), 76 states have call predecessors, (197), 75 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-12 01:01:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1012 transitions. [2023-11-12 01:01:06,490 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1012 transitions. Word has length 128 [2023-11-12 01:01:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:06,491 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1012 transitions. [2023-11-12 01:01:06,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 01:01:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1012 transitions. [2023-11-12 01:01:06,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-12 01:01:06,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:06,496 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 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] [2023-11-12 01:01:06,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:01:06,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:06,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash -861125794, now seen corresponding path program 1 times [2023-11-12 01:01:06,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:06,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490296337] [2023-11-12 01:01:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:06,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-12 01:01:06,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:06,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490296337] [2023-11-12 01:01:06,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490296337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:06,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:06,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:06,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319915943] [2023-11-12 01:01:06,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:06,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:06,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:06,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:06,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:06,850 INFO L87 Difference]: Start difference. First operand 738 states and 1012 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 01:01:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:07,259 INFO L93 Difference]: Finished difference Result 1796 states and 2422 transitions. [2023-11-12 01:01:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 132 [2023-11-12 01:01:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:07,270 INFO L225 Difference]: With dead ends: 1796 [2023-11-12 01:01:07,271 INFO L226 Difference]: Without dead ends: 1090 [2023-11-12 01:01:07,273 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 [2023-11-12 01:01:07,274 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 313 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:07,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 814 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:01:07,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2023-11-12 01:01:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1073. [2023-11-12 01:01:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 673 states have (on average 1.3298662704309063) internal successors, (895), 710 states have internal predecessors, (895), 270 states have call successors, (270), 132 states have call predecessors, (270), 129 states have return successors, (272), 256 states have call predecessors, (272), 264 states have call successors, (272) [2023-11-12 01:01:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1437 transitions. [2023-11-12 01:01:07,362 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1437 transitions. Word has length 132 [2023-11-12 01:01:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:07,364 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1437 transitions. [2023-11-12 01:01:07,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 01:01:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1437 transitions. [2023-11-12 01:01:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-12 01:01:07,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:07,368 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 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] [2023-11-12 01:01:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:01:07,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:07,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash 368226942, now seen corresponding path program 1 times [2023-11-12 01:01:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:07,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030458377] [2023-11-12 01:01:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:07,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-12 01:01:07,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030458377] [2023-11-12 01:01:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030458377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:07,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:07,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731173850] [2023-11-12 01:01:07,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:07,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:07,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:07,595 INFO L87 Difference]: Start difference. First operand 1073 states and 1437 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 01:01:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:08,059 INFO L93 Difference]: Finished difference Result 1964 states and 2612 transitions. [2023-11-12 01:01:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:08,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 132 [2023-11-12 01:01:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:08,067 INFO L225 Difference]: With dead ends: 1964 [2023-11-12 01:01:08,067 INFO L226 Difference]: Without dead ends: 931 [2023-11-12 01:01:08,070 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 [2023-11-12 01:01:08,070 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 400 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:08,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1094 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:01:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-11-12 01:01:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 914. [2023-11-12 01:01:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 585 states have (on average 1.335042735042735) internal successors, (781), 610 states have internal predecessors, (781), 213 states have call successors, (213), 117 states have call predecessors, (213), 115 states have return successors, (214), 203 states have call predecessors, (214), 207 states have call successors, (214) [2023-11-12 01:01:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1208 transitions. [2023-11-12 01:01:08,138 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1208 transitions. Word has length 132 [2023-11-12 01:01:08,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:08,138 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1208 transitions. [2023-11-12 01:01:08,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 01:01:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1208 transitions. [2023-11-12 01:01:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-12 01:01:08,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:08,141 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 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] [2023-11-12 01:01:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:01:08,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:08,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1570466280, now seen corresponding path program 1 times [2023-11-12 01:01:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:08,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776181572] [2023-11-12 01:01:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-12 01:01:08,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:08,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776181572] [2023-11-12 01:01:08,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776181572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:08,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:08,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:08,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831297077] [2023-11-12 01:01:08,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:08,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:08,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:08,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:08,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:08,407 INFO L87 Difference]: Start difference. First operand 914 states and 1208 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 01:01:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:08,649 INFO L93 Difference]: Finished difference Result 916 states and 1209 transitions. [2023-11-12 01:01:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:08,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2023-11-12 01:01:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:08,657 INFO L225 Difference]: With dead ends: 916 [2023-11-12 01:01:08,657 INFO L226 Difference]: Without dead ends: 913 [2023-11-12 01:01:08,658 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 [2023-11-12 01:01:08,659 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 497 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:08,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 461 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2023-11-12 01:01:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2023-11-12 01:01:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 585 states have (on average 1.3333333333333333) internal successors, (780), 609 states have internal predecessors, (780), 212 states have call successors, (212), 117 states have call predecessors, (212), 115 states have return successors, (214), 203 states have call predecessors, (214), 207 states have call successors, (214) [2023-11-12 01:01:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1206 transitions. [2023-11-12 01:01:08,730 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1206 transitions. Word has length 129 [2023-11-12 01:01:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:08,734 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1206 transitions. [2023-11-12 01:01:08,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 01:01:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1206 transitions. [2023-11-12 01:01:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 01:01:08,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:08,736 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 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] [2023-11-12 01:01:08,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:01:08,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:08,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1439705798, now seen corresponding path program 1 times [2023-11-12 01:01:08,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:08,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945478682] [2023-11-12 01:01:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-12 01:01:09,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:09,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945478682] [2023-11-12 01:01:09,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945478682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:09,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:09,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:09,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340465906] [2023-11-12 01:01:09,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:09,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:09,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:09,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:09,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:09,016 INFO L87 Difference]: Start difference. First operand 913 states and 1206 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 01:01:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:09,509 INFO L93 Difference]: Finished difference Result 1462 states and 1966 transitions. [2023-11-12 01:01:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:09,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 130 [2023-11-12 01:01:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:09,521 INFO L225 Difference]: With dead ends: 1462 [2023-11-12 01:01:09,521 INFO L226 Difference]: Without dead ends: 1451 [2023-11-12 01:01:09,524 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 [2023-11-12 01:01:09,526 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 403 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:09,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 840 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2023-11-12 01:01:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1451. [2023-11-12 01:01:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 954 states have (on average 1.3459119496855345) internal successors, (1284), 992 states have internal predecessors, (1284), 319 states have call successors, (319), 186 states have call predecessors, (319), 177 states have return successors, (339), 298 states have call predecessors, (339), 314 states have call successors, (339) [2023-11-12 01:01:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1942 transitions. [2023-11-12 01:01:09,650 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1942 transitions. Word has length 130 [2023-11-12 01:01:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:09,651 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1942 transitions. [2023-11-12 01:01:09,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 01:01:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1942 transitions. [2023-11-12 01:01:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-12 01:01:09,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:09,655 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2023-11-12 01:01:09,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:01:09,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:09,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1360570308, now seen corresponding path program 1 times [2023-11-12 01:01:09,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:09,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041321842] [2023-11-12 01:01:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-12 01:01:10,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:10,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041321842] [2023-11-12 01:01:10,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041321842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:10,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:10,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:10,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101022788] [2023-11-12 01:01:10,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:10,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:10,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:10,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:10,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:10,026 INFO L87 Difference]: Start difference. First operand 1451 states and 1942 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-12 01:01:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:10,628 INFO L93 Difference]: Finished difference Result 3390 states and 4549 transitions. [2023-11-12 01:01:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 171 [2023-11-12 01:01:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:10,643 INFO L225 Difference]: With dead ends: 3390 [2023-11-12 01:01:10,644 INFO L226 Difference]: Without dead ends: 1996 [2023-11-12 01:01:10,648 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 [2023-11-12 01:01:10,650 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 441 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:10,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1094 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2023-11-12 01:01:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1975. [2023-11-12 01:01:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1326 states have (on average 1.3529411764705883) internal successors, (1794), 1369 states have internal predecessors, (1794), 408 states have call successors, (408), 252 states have call predecessors, (408), 240 states have return successors, (438), 384 states have call predecessors, (438), 403 states have call successors, (438) [2023-11-12 01:01:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2640 transitions. [2023-11-12 01:01:10,813 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2640 transitions. Word has length 171 [2023-11-12 01:01:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:10,814 INFO L495 AbstractCegarLoop]: Abstraction has 1975 states and 2640 transitions. [2023-11-12 01:01:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-12 01:01:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2640 transitions. [2023-11-12 01:01:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-11-12 01:01:10,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:10,818 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:10,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 01:01:10,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:10,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1328997077, now seen corresponding path program 1 times [2023-11-12 01:01:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:10,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216807846] [2023-11-12 01:01:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:10,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-11-12 01:01:11,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216807846] [2023-11-12 01:01:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216807846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:11,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:11,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:11,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886063241] [2023-11-12 01:01:11,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:11,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:11,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:11,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:01:11,722 INFO L87 Difference]: Start difference. First operand 1975 states and 2640 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-12 01:01:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:12,222 INFO L93 Difference]: Finished difference Result 1988 states and 2657 transitions. [2023-11-12 01:01:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:01:12,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 186 [2023-11-12 01:01:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:12,238 INFO L225 Difference]: With dead ends: 1988 [2023-11-12 01:01:12,239 INFO L226 Difference]: Without dead ends: 1985 [2023-11-12 01:01:12,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:01:12,241 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 26 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:12,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 891 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2023-11-12 01:01:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1981. [2023-11-12 01:01:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1330 states have (on average 1.349624060150376) internal successors, (1795), 1372 states have internal predecessors, (1795), 408 states have call successors, (408), 255 states have call predecessors, (408), 242 states have return successors, (438), 384 states have call predecessors, (438), 403 states have call successors, (438) [2023-11-12 01:01:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2641 transitions. [2023-11-12 01:01:12,456 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2641 transitions. Word has length 186 [2023-11-12 01:01:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:12,457 INFO L495 AbstractCegarLoop]: Abstraction has 1981 states and 2641 transitions. [2023-11-12 01:01:12,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-12 01:01:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2641 transitions. [2023-11-12 01:01:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-12 01:01:12,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:12,462 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 01:01:12,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:12,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -371403019, now seen corresponding path program 1 times [2023-11-12 01:01:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:12,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141304391] [2023-11-12 01:01:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-11-12 01:01:13,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141304391] [2023-11-12 01:01:13,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141304391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:13,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:01:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815603930] [2023-11-12 01:01:13,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:13,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:01:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:01:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:01:13,311 INFO L87 Difference]: Start difference. First operand 1981 states and 2641 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 5 states have call predecessors, (35), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-12 01:01:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:14,337 INFO L93 Difference]: Finished difference Result 3746 states and 5039 transitions. [2023-11-12 01:01:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:01:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 5 states have call predecessors, (35), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 211 [2023-11-12 01:01:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:14,352 INFO L225 Difference]: With dead ends: 3746 [2023-11-12 01:01:14,352 INFO L226 Difference]: Without dead ends: 1822 [2023-11-12 01:01:14,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:14,359 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 19 mSDsluCounter, 2231 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:14,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2683 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 01:01:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2023-11-12 01:01:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1822. [2023-11-12 01:01:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1249 states have (on average 1.3594875900720576) internal successors, (1698), 1285 states have internal predecessors, (1698), 363 states have call successors, (363), 218 states have call predecessors, (363), 209 states have return successors, (370), 345 states have call predecessors, (370), 358 states have call successors, (370) [2023-11-12 01:01:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2431 transitions. [2023-11-12 01:01:14,514 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2431 transitions. Word has length 211 [2023-11-12 01:01:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:14,516 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2431 transitions. [2023-11-12 01:01:14,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 5 states have call predecessors, (35), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-12 01:01:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2431 transitions. [2023-11-12 01:01:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-12 01:01:14,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:14,521 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:14,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 01:01:14,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:14,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:14,522 INFO L85 PathProgramCache]: Analyzing trace with hash 274343052, now seen corresponding path program 1 times [2023-11-12 01:01:14,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:14,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209204210] [2023-11-12 01:01:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:14,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-11-12 01:01:16,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:16,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209204210] [2023-11-12 01:01:16,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209204210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:16,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653066946] [2023-11-12 01:01:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:16,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:16,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:16,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:01:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:17,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 2135 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 01:01:17,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-11-12 01:01:17,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:17,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653066946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:17,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:17,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-12 01:01:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658428652] [2023-11-12 01:01:17,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:17,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:17,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:17,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:01:17,645 INFO L87 Difference]: Start difference. First operand 1822 states and 2431 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-12 01:01:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:19,392 INFO L93 Difference]: Finished difference Result 2527 states and 3402 transitions. [2023-11-12 01:01:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:01:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 216 [2023-11-12 01:01:19,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:19,412 INFO L225 Difference]: With dead ends: 2527 [2023-11-12 01:01:19,412 INFO L226 Difference]: Without dead ends: 2516 [2023-11-12 01:01:19,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:01:19,414 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 369 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:19,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1072 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 01:01:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2023-11-12 01:01:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2463. [2023-11-12 01:01:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 1714 states have (on average 1.3710618436406068) internal successors, (2350), 1762 states have internal predecessors, (2350), 469 states have call successors, (469), 290 states have call predecessors, (469), 279 states have return successors, (476), 447 states have call predecessors, (476), 464 states have call successors, (476) [2023-11-12 01:01:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 3295 transitions. [2023-11-12 01:01:19,733 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 3295 transitions. Word has length 216 [2023-11-12 01:01:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:19,734 INFO L495 AbstractCegarLoop]: Abstraction has 2463 states and 3295 transitions. [2023-11-12 01:01:19,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-12 01:01:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 3295 transitions. [2023-11-12 01:01:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-12 01:01:19,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:19,742 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:19,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:19,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:19,953 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:19,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash 692937464, now seen corresponding path program 1 times [2023-11-12 01:01:19,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:19,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092782212] [2023-11-12 01:01:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2023-11-12 01:01:20,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:20,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092782212] [2023-11-12 01:01:20,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092782212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:20,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:20,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:20,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152076312] [2023-11-12 01:01:20,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:20,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:20,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:20,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:20,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:20,299 INFO L87 Difference]: Start difference. First operand 2463 states and 3295 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-12 01:01:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:21,080 INFO L93 Difference]: Finished difference Result 5818 states and 7783 transitions. [2023-11-12 01:01:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:21,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 256 [2023-11-12 01:01:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:21,108 INFO L225 Difference]: With dead ends: 5818 [2023-11-12 01:01:21,108 INFO L226 Difference]: Without dead ends: 3412 [2023-11-12 01:01:21,115 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 [2023-11-12 01:01:21,117 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 356 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:21,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 973 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2023-11-12 01:01:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3388. [2023-11-12 01:01:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 2404 states have (on average 1.362728785357737) internal successors, (3276), 2468 states have internal predecessors, (3276), 585 states have call successors, (585), 416 states have call predecessors, (585), 398 states have return successors, (592), 553 states have call predecessors, (592), 580 states have call successors, (592) [2023-11-12 01:01:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4453 transitions. [2023-11-12 01:01:21,553 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4453 transitions. Word has length 256 [2023-11-12 01:01:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:21,554 INFO L495 AbstractCegarLoop]: Abstraction has 3388 states and 4453 transitions. [2023-11-12 01:01:21,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-12 01:01:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4453 transitions. [2023-11-12 01:01:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-12 01:01:21,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:21,562 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:21,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 01:01:21,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:21,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash 818671856, now seen corresponding path program 1 times [2023-11-12 01:01:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:21,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876336291] [2023-11-12 01:01:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2023-11-12 01:01:22,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:22,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876336291] [2023-11-12 01:01:22,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876336291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:22,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:22,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:01:22,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967296517] [2023-11-12 01:01:22,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:22,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:01:22,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:01:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:22,535 INFO L87 Difference]: Start difference. First operand 3388 states and 4453 transitions. Second operand has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-12 01:01:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:23,399 INFO L93 Difference]: Finished difference Result 3403 states and 4467 transitions. [2023-11-12 01:01:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:23,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) Word has length 255 [2023-11-12 01:01:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:23,421 INFO L225 Difference]: With dead ends: 3403 [2023-11-12 01:01:23,421 INFO L226 Difference]: Without dead ends: 3400 [2023-11-12 01:01:23,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:23,424 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 63 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:23,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1728 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:01:23,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2023-11-12 01:01:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3396. [2023-11-12 01:01:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 2409 states have (on average 1.360730593607306) internal successors, (3278), 2472 states have internal predecessors, (3278), 585 states have call successors, (585), 420 states have call predecessors, (585), 401 states have return successors, (592), 553 states have call predecessors, (592), 580 states have call successors, (592) [2023-11-12 01:01:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 4455 transitions. [2023-11-12 01:01:23,699 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 4455 transitions. Word has length 255 [2023-11-12 01:01:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:23,700 INFO L495 AbstractCegarLoop]: Abstraction has 3396 states and 4455 transitions. [2023-11-12 01:01:23,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-12 01:01:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 4455 transitions. [2023-11-12 01:01:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-12 01:01:23,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:23,708 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:23,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 01:01:23,708 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:23,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash 802470189, now seen corresponding path program 1 times [2023-11-12 01:01:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990484317] [2023-11-12 01:01:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2023-11-12 01:01:24,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:24,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990484317] [2023-11-12 01:01:24,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990484317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:24,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:24,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:01:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494039053] [2023-11-12 01:01:24,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:24,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:01:24,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:01:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:24,733 INFO L87 Difference]: Start difference. First operand 3396 states and 4455 transitions. Second operand has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-12 01:01:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:25,596 INFO L93 Difference]: Finished difference Result 3418 states and 4472 transitions. [2023-11-12 01:01:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:25,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) Word has length 261 [2023-11-12 01:01:25,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:25,619 INFO L225 Difference]: With dead ends: 3418 [2023-11-12 01:01:25,619 INFO L226 Difference]: Without dead ends: 3415 [2023-11-12 01:01:25,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:25,622 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 159 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:25,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1646 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:01:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2023-11-12 01:01:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3409. [2023-11-12 01:01:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 2414 states have (on average 1.3591549295774648) internal successors, (3281), 2479 states have internal predecessors, (3281), 586 states have call successors, (586), 424 states have call predecessors, (586), 408 states have return successors, (594), 555 states have call predecessors, (594), 582 states have call successors, (594) [2023-11-12 01:01:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4461 transitions. [2023-11-12 01:01:25,869 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4461 transitions. Word has length 261 [2023-11-12 01:01:25,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:25,869 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 4461 transitions. [2023-11-12 01:01:25,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-12 01:01:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4461 transitions. [2023-11-12 01:01:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-12 01:01:25,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:25,877 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:25,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 01:01:25,877 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:25,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:25,878 INFO L85 PathProgramCache]: Analyzing trace with hash -223414506, now seen corresponding path program 1 times [2023-11-12 01:01:25,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:25,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825256063] [2023-11-12 01:01:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:25,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-12 01:01:26,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:26,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825256063] [2023-11-12 01:01:26,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825256063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:26,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756068243] [2023-11-12 01:01:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:26,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:26,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:26,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:26,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:01:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:27,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 2395 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:01:27,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-12 01:01:27,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:27,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756068243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:27,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:27,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-12 01:01:27,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639020945] [2023-11-12 01:01:27,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:27,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:27,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:27,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:01:27,771 INFO L87 Difference]: Start difference. First operand 3409 states and 4461 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-11-12 01:01:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:30,461 INFO L93 Difference]: Finished difference Result 12507 states and 17030 transitions. [2023-11-12 01:01:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:30,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 265 [2023-11-12 01:01:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:30,528 INFO L225 Difference]: With dead ends: 12507 [2023-11-12 01:01:30,528 INFO L226 Difference]: Without dead ends: 12499 [2023-11-12 01:01:30,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:30,535 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 1527 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:30,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 1849 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-12 01:01:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2023-11-12 01:01:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 9988. [2023-11-12 01:01:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 7095 states have (on average 1.3627906976744186) internal successors, (9669), 7291 states have internal predecessors, (9669), 1694 states have call successors, (1694), 1244 states have call predecessors, (1694), 1198 states have return successors, (1726), 1599 states have call predecessors, (1726), 1690 states have call successors, (1726) [2023-11-12 01:01:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 13089 transitions. [2023-11-12 01:01:31,431 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 13089 transitions. Word has length 265 [2023-11-12 01:01:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:31,432 INFO L495 AbstractCegarLoop]: Abstraction has 9988 states and 13089 transitions. [2023-11-12 01:01:31,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-11-12 01:01:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 13089 transitions. [2023-11-12 01:01:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-12 01:01:31,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:31,441 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:31,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:31,656 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:31,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash -475783714, now seen corresponding path program 1 times [2023-11-12 01:01:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280769572] [2023-11-12 01:01:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:31,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2023-11-12 01:01:33,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:33,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280769572] [2023-11-12 01:01:33,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280769572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:33,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813459562] [2023-11-12 01:01:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:33,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:33,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:33,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:33,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:01:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:34,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 2468 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 01:01:34,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-12 01:01:34,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:34,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813459562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:34,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:34,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-12 01:01:34,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846065224] [2023-11-12 01:01:34,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:34,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:01:34,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:01:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:01:34,332 INFO L87 Difference]: Start difference. First operand 9988 states and 13089 transitions. Second operand has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-12 01:01:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:36,507 INFO L93 Difference]: Finished difference Result 13223 states and 17516 transitions. [2023-11-12 01:01:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:01:36,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) Word has length 270 [2023-11-12 01:01:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:36,562 INFO L225 Difference]: With dead ends: 13223 [2023-11-12 01:01:36,562 INFO L226 Difference]: Without dead ends: 13212 [2023-11-12 01:01:36,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:01:36,569 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 422 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:36,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1967 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-12 01:01:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13212 states. [2023-11-12 01:01:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13212 to 9988. [2023-11-12 01:01:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 7095 states have (on average 1.3627906976744186) internal successors, (9669), 7291 states have internal predecessors, (9669), 1694 states have call successors, (1694), 1244 states have call predecessors, (1694), 1198 states have return successors, (1726), 1599 states have call predecessors, (1726), 1690 states have call successors, (1726) [2023-11-12 01:01:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 13089 transitions. [2023-11-12 01:01:37,371 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 13089 transitions. Word has length 270 [2023-11-12 01:01:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:37,372 INFO L495 AbstractCegarLoop]: Abstraction has 9988 states and 13089 transitions. [2023-11-12 01:01:37,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-12 01:01:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 13089 transitions. [2023-11-12 01:01:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-12 01:01:37,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:37,385 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:37,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:37,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12022fe7-6f25-4a85-b58d-b0a1848e7db0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:37,595 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:37,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1406322430, now seen corresponding path program 1 times [2023-11-12 01:01:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:37,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140209713] [2023-11-12 01:01:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat