./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b1b2a361b7351c4ac2fc0213f47206309b2fae43ca25ec3cefac8a1c8b001422 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:20:50,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:20:50,168 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:20:50,177 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:20:50,178 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:20:50,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:20:50,227 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:20:50,228 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:20:50,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:20:50,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:20:50,237 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:20:50,238 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:20:50,238 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:20:50,241 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:20:50,242 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:20:50,242 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:20:50,243 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:20:50,243 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:20:50,244 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:20:50,245 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:20:50,245 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:20:50,246 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:20:50,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:20:50,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:20:50,249 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:20:50,250 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:20:50,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:20:50,251 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:20:50,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:20:50,252 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:20:50,254 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:20:50,255 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:20:50,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:20:50,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:50,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:20:50,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:20:50,257 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:20:50,257 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:20:50,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:20:50,258 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:20:50,258 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:20:50,259 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:20:50,259 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_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1b2a361b7351c4ac2fc0213f47206309b2fae43ca25ec3cefac8a1c8b001422 [2023-11-19 05:20:50,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:20:50,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:20:50,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:20:50,693 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:20:50,693 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:20:50,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/../../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 [2023-11-19 05:20:54,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:20:54,887 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:20:54,888 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/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 [2023-11-19 05:20:54,940 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/data/075de8d32/113ddd2ffdc042f4a357125a11df33eb/FLAGfbab49c1c [2023-11-19 05:20:54,961 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/data/075de8d32/113ddd2ffdc042f4a357125a11df33eb [2023-11-19 05:20:54,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:20:54,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:20:54,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:54,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:20:54,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:20:54,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:54" (1/1) ... [2023-11-19 05:20:54,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17edd312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:54, skipping insertion in model container [2023-11-19 05:20:54,986 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:54" (1/1) ... [2023-11-19 05:20:55,127 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:20:56,394 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_7db1cea0-8ea1-4414-9c48-5598ea7cb309/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] [2023-11-19 05:20:56,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:20:56,647 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:20:56,766 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] [2023-11-19 05:20:56,769 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] [2023-11-19 05:20:56,770 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] [2023-11-19 05:20:56,770 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] [2023-11-19 05:20:56,771 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] [2023-11-19 05:20:56,820 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] [2023-11-19 05:20:56,823 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] [2023-11-19 05:20:56,824 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] [2023-11-19 05:20:56,824 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] [2023-11-19 05:20:56,825 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] [2023-11-19 05:20:56,833 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] [2023-11-19 05:20:56,901 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_7db1cea0-8ea1-4414-9c48-5598ea7cb309/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] [2023-11-19 05:20:56,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:20:57,004 WARN L675 CHandler]: The function __xadd_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:20:57,013 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:20:57,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57 WrapperNode [2023-11-19 05:20:57,014 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:57,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:20:57,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:20:57,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:20:57,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,249 INFO L138 Inliner]: procedures = 188, calls = 552, calls flagged for inlining = 73, calls inlined = 68, statements flattened = 1631 [2023-11-19 05:20:57,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:20:57,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:20:57,251 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:20:57,251 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:20:57,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,291 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,431 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,443 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:20:57,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:20:57,483 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:20:57,483 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:20:57,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (1/1) ... [2023-11-19 05:20:57,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:57,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:20:57,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:20:57,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:20:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_serio_raw_mutex [2023-11-19 05:20:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_serio_raw_mutex [2023-11-19 05:20:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2023-11-19 05:20:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2023-11-19 05:20:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 05:20:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 05:20:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:20:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 05:20:57,590 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 05:20:57,591 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:20:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:20:57,591 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 05:20:57,592 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 05:20:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure kill_fasync [2023-11-19 05:20:57,593 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_fasync [2023-11-19 05:20:57,594 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-19 05:20:57,594 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-19 05:20:57,594 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-19 05:20:57,595 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-19 05:20:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:20:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-19 05:20:57,598 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-19 05:20:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:20:57,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:20:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-19 05:20:57,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-19 05:20:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2023-11-19 05:20:57,599 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2023-11-19 05:20:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 05:20:57,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 05:20:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_disconnect [2023-11-19 05:20:57,599 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_disconnect [2023-11-19 05:20:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure serio_continue_rx [2023-11-19 05:20:57,600 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_continue_rx [2023-11-19 05:20:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 05:20:57,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 05:20:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:20:57,600 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:20:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:20:57,601 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_poll [2023-11-19 05:20:57,601 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_poll [2023-11-19 05:20:57,601 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-19 05:20:57,601 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-19 05:20:57,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-19 05:20:57,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-19 05:20:57,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:20:57,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-19 05:20:57,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-19 05:20:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:20:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure serio_set_drvdata [2023-11-19 05:20:57,603 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_set_drvdata [2023-11-19 05:20:57,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:20:57,604 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-19 05:20:57,605 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-19 05:20:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 05:20:57,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 05:20:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2023-11-19 05:20:57,606 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2023-11-19 05:20:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:20:57,607 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-19 05:20:57,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-19 05:20:57,607 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2023-11-19 05:20:57,607 INFO L130 BoogieDeclarations]: Found specification of procedure serio_pause_rx [2023-11-19 05:20:57,608 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_pause_rx [2023-11-19 05:20:57,609 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-19 05:20:57,609 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-19 05:20:57,609 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add_return [2023-11-19 05:20:57,609 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add_return [2023-11-19 05:20:57,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:20:57,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:20:57,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2023-11-19 05:20:57,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2023-11-19 05:20:57,610 INFO L130 BoogieDeclarations]: Found specification of procedure serio_get_drvdata [2023-11-19 05:20:57,610 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_get_drvdata [2023-11-19 05:20:57,610 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-19 05:20:57,611 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-19 05:20:57,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_serio_raw_mutex [2023-11-19 05:20:57,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_serio_raw_mutex [2023-11-19 05:20:57,612 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-11-19 05:20:57,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-11-19 05:20:57,612 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 05:20:57,613 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 05:20:57,613 INFO L130 BoogieDeclarations]: Found specification of procedure serio_close [2023-11-19 05:20:57,613 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_close [2023-11-19 05:20:57,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_serio_raw_mutex [2023-11-19 05:20:57,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_serio_raw_mutex [2023-11-19 05:20:57,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:20:57,614 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_write [2023-11-19 05:20:57,614 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_write [2023-11-19 05:20:57,614 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_fasync [2023-11-19 05:20:57,614 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_fasync [2023-11-19 05:20:57,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:20:57,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:20:58,252 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:20:58,261 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:20:58,486 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 05:21:00,273 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:21:00,844 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:21:00,844 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:21:00,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:00 BoogieIcfgContainer [2023-11-19 05:21:00,866 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:21:00,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:21:00,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:21:00,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:21:00,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:20:54" (1/3) ... [2023-11-19 05:21:00,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1748df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:00, skipping insertion in model container [2023-11-19 05:21:00,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:57" (2/3) ... [2023-11-19 05:21:00,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1748df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:00, skipping insertion in model container [2023-11-19 05:21:00,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:00" (3/3) ... [2023-11-19 05:21:00,883 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i [2023-11-19 05:21:00,911 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:21:00,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:21:00,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:21:01,007 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;@7120e812, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:21:01,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:21:01,016 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) [2023-11-19 05:21:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-19 05:21:01,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:01,039 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] [2023-11-19 05:21:01,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:01,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:01,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1571278221, now seen corresponding path program 1 times [2023-11-19 05:21:01,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:01,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639071162] [2023-11-19 05:21:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:01,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-19 05:21:02,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:02,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639071162] [2023-11-19 05:21:02,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639071162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:02,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:02,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:02,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235123304] [2023-11-19 05:21:02,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:02,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:02,373 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) [2023-11-19 05:21:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:03,244 INFO L93 Difference]: Finished difference Result 1130 states and 1609 transitions. [2023-11-19 05:21:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:03,248 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 [2023-11-19 05:21:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:03,281 INFO L225 Difference]: With dead ends: 1130 [2023-11-19 05:21:03,282 INFO L226 Difference]: Without dead ends: 746 [2023-11-19 05:21:03,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:03,314 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 485 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:03,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 958 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:21:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-19 05:21:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 740. [2023-11-19 05:21:03,504 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) [2023-11-19 05:21:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1016 transitions. [2023-11-19 05:21:03,522 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1016 transitions. Word has length 123 [2023-11-19 05:21:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:03,525 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1016 transitions. [2023-11-19 05:21:03,525 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) [2023-11-19 05:21:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1016 transitions. [2023-11-19 05:21:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-19 05:21:03,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:03,539 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] [2023-11-19 05:21:03,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:21:03,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:03,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash 672028453, now seen corresponding path program 1 times [2023-11-19 05:21:03,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:03,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388690544] [2023-11-19 05:21:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:03,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-19 05:21:03,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:03,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388690544] [2023-11-19 05:21:03,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388690544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:03,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:03,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353515696] [2023-11-19 05:21:03,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:03,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:03,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:03,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:03,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:03,949 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) [2023-11-19 05:21:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:04,297 INFO L93 Difference]: Finished difference Result 742 states and 1017 transitions. [2023-11-19 05:21:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:04,298 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 [2023-11-19 05:21:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:04,310 INFO L225 Difference]: With dead ends: 742 [2023-11-19 05:21:04,310 INFO L226 Difference]: Without dead ends: 739 [2023-11-19 05:21:04,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:04,317 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 503 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-11-19 05:21:04,321 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] [2023-11-19 05:21:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-11-19 05:21:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 739. [2023-11-19 05:21:04,454 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) [2023-11-19 05:21:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1014 transitions. [2023-11-19 05:21:04,464 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1014 transitions. Word has length 127 [2023-11-19 05:21:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:04,466 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 1014 transitions. [2023-11-19 05:21:04,467 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) [2023-11-19 05:21:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1014 transitions. [2023-11-19 05:21:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-19 05:21:04,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:04,477 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] [2023-11-19 05:21:04,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:21:04,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:04,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash -642072797, now seen corresponding path program 1 times [2023-11-19 05:21:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:04,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210829158] [2023-11-19 05:21:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-19 05:21:04,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:04,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210829158] [2023-11-19 05:21:04,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210829158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:04,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:04,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:04,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473264605] [2023-11-19 05:21:04,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:04,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:04,845 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) [2023-11-19 05:21:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:05,211 INFO L93 Difference]: Finished difference Result 741 states and 1015 transitions. [2023-11-19 05:21:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:05,212 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 [2023-11-19 05:21:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:05,220 INFO L225 Difference]: With dead ends: 741 [2023-11-19 05:21:05,220 INFO L226 Difference]: Without dead ends: 738 [2023-11-19 05:21:05,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:05,222 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 500 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:05,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 463 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:21:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2023-11-19 05:21:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 738. [2023-11-19 05:21:05,295 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) [2023-11-19 05:21:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1012 transitions. [2023-11-19 05:21:05,303 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1012 transitions. Word has length 128 [2023-11-19 05:21:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:05,304 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1012 transitions. [2023-11-19 05:21:05,307 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) [2023-11-19 05:21:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1012 transitions. [2023-11-19 05:21:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 05:21:05,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:05,311 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] [2023-11-19 05:21:05,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:21:05,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:05,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash -861125794, now seen corresponding path program 1 times [2023-11-19 05:21:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:05,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242177485] [2023-11-19 05:21:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:05,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-19 05:21:05,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:05,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242177485] [2023-11-19 05:21:05,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242177485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:05,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:05,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207442349] [2023-11-19 05:21:05,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:05,772 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) [2023-11-19 05:21:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:06,462 INFO L93 Difference]: Finished difference Result 1796 states and 2422 transitions. [2023-11-19 05:21:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:06,464 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 [2023-11-19 05:21:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:06,480 INFO L225 Difference]: With dead ends: 1796 [2023-11-19 05:21:06,480 INFO L226 Difference]: Without dead ends: 1090 [2023-11-19 05:21:06,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:06,486 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 313 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:06,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 814 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2023-11-19 05:21:06,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1073. [2023-11-19 05:21:06,617 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) [2023-11-19 05:21:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1437 transitions. [2023-11-19 05:21:06,631 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1437 transitions. Word has length 132 [2023-11-19 05:21:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:06,634 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1437 transitions. [2023-11-19 05:21:06,634 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) [2023-11-19 05:21:06,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1437 transitions. [2023-11-19 05:21:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 05:21:06,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:06,638 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] [2023-11-19 05:21:06,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:21:06,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:06,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash 368226942, now seen corresponding path program 1 times [2023-11-19 05:21:06,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:06,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767840020] [2023-11-19 05:21:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:06,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-19 05:21:06,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:06,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767840020] [2023-11-19 05:21:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767840020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:06,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:06,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:06,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984854413] [2023-11-19 05:21:06,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:06,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:06,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:06,945 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) [2023-11-19 05:21:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:07,574 INFO L93 Difference]: Finished difference Result 1964 states and 2612 transitions. [2023-11-19 05:21:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:07,575 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 [2023-11-19 05:21:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:07,621 INFO L225 Difference]: With dead ends: 1964 [2023-11-19 05:21:07,621 INFO L226 Difference]: Without dead ends: 931 [2023-11-19 05:21:07,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:07,626 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 400 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:07,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1094 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-11-19 05:21:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 914. [2023-11-19 05:21:07,710 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) [2023-11-19 05:21:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1208 transitions. [2023-11-19 05:21:07,721 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1208 transitions. Word has length 132 [2023-11-19 05:21:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:07,722 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1208 transitions. [2023-11-19 05:21:07,723 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) [2023-11-19 05:21:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1208 transitions. [2023-11-19 05:21:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 05:21:07,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:07,725 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] [2023-11-19 05:21:07,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:21:07,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:07,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1570466280, now seen corresponding path program 1 times [2023-11-19 05:21:07,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:07,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372442406] [2023-11-19 05:21:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:07,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-19 05:21:08,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:08,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372442406] [2023-11-19 05:21:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372442406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:08,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:08,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:08,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039957575] [2023-11-19 05:21:08,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:08,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:08,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:08,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:08,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:08,045 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) [2023-11-19 05:21:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:08,390 INFO L93 Difference]: Finished difference Result 916 states and 1209 transitions. [2023-11-19 05:21:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:08,391 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 [2023-11-19 05:21:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:08,402 INFO L225 Difference]: With dead ends: 916 [2023-11-19 05:21:08,402 INFO L226 Difference]: Without dead ends: 913 [2023-11-19 05:21:08,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:08,404 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 [2023-11-19 05:21:08,405 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] [2023-11-19 05:21:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2023-11-19 05:21:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2023-11-19 05:21:08,501 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) [2023-11-19 05:21:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1206 transitions. [2023-11-19 05:21:08,511 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1206 transitions. Word has length 129 [2023-11-19 05:21:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:08,516 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1206 transitions. [2023-11-19 05:21:08,516 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) [2023-11-19 05:21:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1206 transitions. [2023-11-19 05:21:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-19 05:21:08,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:08,519 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] [2023-11-19 05:21:08,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:21:08,520 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:08,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1439705798, now seen corresponding path program 1 times [2023-11-19 05:21:08,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:08,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862592278] [2023-11-19 05:21:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-19 05:21:08,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:08,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862592278] [2023-11-19 05:21:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862592278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:08,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:08,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810336031] [2023-11-19 05:21:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:08,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:08,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:08,871 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) [2023-11-19 05:21:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:09,410 INFO L93 Difference]: Finished difference Result 1462 states and 1966 transitions. [2023-11-19 05:21:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:09,411 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 [2023-11-19 05:21:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:09,425 INFO L225 Difference]: With dead ends: 1462 [2023-11-19 05:21:09,425 INFO L226 Difference]: Without dead ends: 1451 [2023-11-19 05:21:09,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:09,431 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 [2023-11-19 05:21:09,431 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] [2023-11-19 05:21:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2023-11-19 05:21:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1451. [2023-11-19 05:21:09,583 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) [2023-11-19 05:21:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1942 transitions. [2023-11-19 05:21:09,599 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1942 transitions. Word has length 130 [2023-11-19 05:21:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:09,600 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1942 transitions. [2023-11-19 05:21:09,601 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) [2023-11-19 05:21:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1942 transitions. [2023-11-19 05:21:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-19 05:21:09,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:09,605 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] [2023-11-19 05:21:09,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:21:09,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:09,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:09,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1360570308, now seen corresponding path program 1 times [2023-11-19 05:21:09,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:09,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80487502] [2023-11-19 05:21:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:09,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-19 05:21:10,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:10,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80487502] [2023-11-19 05:21:10,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80487502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:10,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:10,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:10,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724068838] [2023-11-19 05:21:10,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:10,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:10,025 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) [2023-11-19 05:21:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:10,842 INFO L93 Difference]: Finished difference Result 3390 states and 4549 transitions. [2023-11-19 05:21:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:10,843 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 [2023-11-19 05:21:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:10,860 INFO L225 Difference]: With dead ends: 3390 [2023-11-19 05:21:10,860 INFO L226 Difference]: Without dead ends: 1996 [2023-11-19 05:21:10,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:10,866 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 441 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:10,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1094 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2023-11-19 05:21:11,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1975. [2023-11-19 05:21:11,032 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) [2023-11-19 05:21:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2640 transitions. [2023-11-19 05:21:11,049 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2640 transitions. Word has length 171 [2023-11-19 05:21:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:11,050 INFO L495 AbstractCegarLoop]: Abstraction has 1975 states and 2640 transitions. [2023-11-19 05:21:11,050 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) [2023-11-19 05:21:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2640 transitions. [2023-11-19 05:21:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-11-19 05:21:11,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:11,058 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] [2023-11-19 05:21:11,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:21:11,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:11,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1328997077, now seen corresponding path program 1 times [2023-11-19 05:21:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:11,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992886390] [2023-11-19 05:21:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:11,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-11-19 05:21:11,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:11,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992886390] [2023-11-19 05:21:11,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992886390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:11,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:11,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:21:11,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004529969] [2023-11-19 05:21:11,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:11,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:21:11,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:21:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:11,920 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) [2023-11-19 05:21:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:12,460 INFO L93 Difference]: Finished difference Result 1988 states and 2657 transitions. [2023-11-19 05:21:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:21:12,461 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 [2023-11-19 05:21:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:12,475 INFO L225 Difference]: With dead ends: 1988 [2023-11-19 05:21:12,475 INFO L226 Difference]: Without dead ends: 1985 [2023-11-19 05:21:12,477 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 [2023-11-19 05:21:12,477 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 [2023-11-19 05:21:12,478 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] [2023-11-19 05:21:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2023-11-19 05:21:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1981. [2023-11-19 05:21:12,695 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) [2023-11-19 05:21:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2641 transitions. [2023-11-19 05:21:12,712 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2641 transitions. Word has length 186 [2023-11-19 05:21:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:12,712 INFO L495 AbstractCegarLoop]: Abstraction has 1981 states and 2641 transitions. [2023-11-19 05:21:12,713 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) [2023-11-19 05:21:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2641 transitions. [2023-11-19 05:21:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-19 05:21:12,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:12,717 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] [2023-11-19 05:21:12,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:21:12,718 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:12,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash -371403019, now seen corresponding path program 1 times [2023-11-19 05:21:12,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:12,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014727981] [2023-11-19 05:21:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:12,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-11-19 05:21:13,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014727981] [2023-11-19 05:21:13,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014727981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:13,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:13,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:21:13,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388504474] [2023-11-19 05:21:13,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:13,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:21:13,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:13,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:21:13,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:21:13,548 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) [2023-11-19 05:21:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:15,007 INFO L93 Difference]: Finished difference Result 3746 states and 5039 transitions. [2023-11-19 05:21:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:21:15,008 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 [2023-11-19 05:21:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:15,025 INFO L225 Difference]: With dead ends: 3746 [2023-11-19 05:21:15,025 INFO L226 Difference]: Without dead ends: 1822 [2023-11-19 05:21:15,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:21:15,033 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 19 mSDsluCounter, 2231 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:15,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2683 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 05:21:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2023-11-19 05:21:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1822. [2023-11-19 05:21:15,204 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) [2023-11-19 05:21:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2431 transitions. [2023-11-19 05:21:15,218 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2431 transitions. Word has length 211 [2023-11-19 05:21:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:15,219 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2431 transitions. [2023-11-19 05:21:15,220 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) [2023-11-19 05:21:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2431 transitions. [2023-11-19 05:21:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-19 05:21:15,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:15,225 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] [2023-11-19 05:21:15,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:21:15,226 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:15,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:15,227 INFO L85 PathProgramCache]: Analyzing trace with hash 274343052, now seen corresponding path program 1 times [2023-11-19 05:21:15,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:15,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839079044] [2023-11-19 05:21:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:15,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-11-19 05:21:17,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:17,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839079044] [2023-11-19 05:21:17,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839079044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:17,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310358021] [2023-11-19 05:21:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:17,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:17,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:17,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:21:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:18,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 2135 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 05:21:18,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-11-19 05:21:18,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:18,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310358021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:18,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:18,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-19 05:21:18,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547799857] [2023-11-19 05:21:18,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:18,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:21:18,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:21:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:21:18,898 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) [2023-11-19 05:21:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:21,011 INFO L93 Difference]: Finished difference Result 2527 states and 3402 transitions. [2023-11-19 05:21:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:21:21,012 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 [2023-11-19 05:21:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:21,034 INFO L225 Difference]: With dead ends: 2527 [2023-11-19 05:21:21,034 INFO L226 Difference]: Without dead ends: 2516 [2023-11-19 05:21:21,037 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 [2023-11-19 05:21:21,038 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 369 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:21,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1072 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 05:21:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2023-11-19 05:21:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2463. [2023-11-19 05:21:21,341 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) [2023-11-19 05:21:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 3295 transitions. [2023-11-19 05:21:21,360 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 3295 transitions. Word has length 216 [2023-11-19 05:21:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:21,361 INFO L495 AbstractCegarLoop]: Abstraction has 2463 states and 3295 transitions. [2023-11-19 05:21:21,361 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) [2023-11-19 05:21:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 3295 transitions. [2023-11-19 05:21:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-19 05:21:21,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:21,371 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] [2023-11-19 05:21:21,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:21,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:21:21,597 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:21,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash 692937464, now seen corresponding path program 1 times [2023-11-19 05:21:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:21,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193669980] [2023-11-19 05:21:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2023-11-19 05:21:21,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:21,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193669980] [2023-11-19 05:21:21,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193669980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:21,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:21,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331529743] [2023-11-19 05:21:21,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:21,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:21,998 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) [2023-11-19 05:21:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:22,833 INFO L93 Difference]: Finished difference Result 5818 states and 7783 transitions. [2023-11-19 05:21:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:22,834 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 [2023-11-19 05:21:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:22,863 INFO L225 Difference]: With dead ends: 5818 [2023-11-19 05:21:22,863 INFO L226 Difference]: Without dead ends: 3412 [2023-11-19 05:21:22,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:22,872 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 356 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:22,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 973 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2023-11-19 05:21:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3388. [2023-11-19 05:21:23,233 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) [2023-11-19 05:21:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4453 transitions. [2023-11-19 05:21:23,265 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4453 transitions. Word has length 256 [2023-11-19 05:21:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:23,265 INFO L495 AbstractCegarLoop]: Abstraction has 3388 states and 4453 transitions. [2023-11-19 05:21:23,267 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) [2023-11-19 05:21:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4453 transitions. [2023-11-19 05:21:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-19 05:21:23,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:23,274 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] [2023-11-19 05:21:23,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 05:21:23,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:23,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash 818671856, now seen corresponding path program 1 times [2023-11-19 05:21:23,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:23,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351090000] [2023-11-19 05:21:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:23,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2023-11-19 05:21:24,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:24,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351090000] [2023-11-19 05:21:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351090000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:24,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:24,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:21:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333768154] [2023-11-19 05:21:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:24,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:21:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:21:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:24,315 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) [2023-11-19 05:21:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:25,178 INFO L93 Difference]: Finished difference Result 3403 states and 4467 transitions. [2023-11-19 05:21:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:21:25,179 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 [2023-11-19 05:21:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:25,206 INFO L225 Difference]: With dead ends: 3403 [2023-11-19 05:21:25,207 INFO L226 Difference]: Without dead ends: 3400 [2023-11-19 05:21:25,209 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 [2023-11-19 05:21:25,211 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 [2023-11-19 05:21:25,211 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] [2023-11-19 05:21:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2023-11-19 05:21:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3396. [2023-11-19 05:21:25,585 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) [2023-11-19 05:21:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 4455 transitions. [2023-11-19 05:21:25,608 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 4455 transitions. Word has length 255 [2023-11-19 05:21:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:25,609 INFO L495 AbstractCegarLoop]: Abstraction has 3396 states and 4455 transitions. [2023-11-19 05:21:25,609 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) [2023-11-19 05:21:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 4455 transitions. [2023-11-19 05:21:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-19 05:21:25,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:25,619 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] [2023-11-19 05:21:25,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 05:21:25,620 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:25,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash 802470189, now seen corresponding path program 1 times [2023-11-19 05:21:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:25,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508438230] [2023-11-19 05:21:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2023-11-19 05:21:26,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:26,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508438230] [2023-11-19 05:21:26,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508438230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:26,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:26,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:21:26,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733936607] [2023-11-19 05:21:26,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:26,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:21:26,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:26,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:21:26,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:26,767 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) [2023-11-19 05:21:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:27,706 INFO L93 Difference]: Finished difference Result 3418 states and 4472 transitions. [2023-11-19 05:21:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:21:27,707 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 [2023-11-19 05:21:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:27,734 INFO L225 Difference]: With dead ends: 3418 [2023-11-19 05:21:27,734 INFO L226 Difference]: Without dead ends: 3415 [2023-11-19 05:21:27,736 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 [2023-11-19 05:21:27,737 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 [2023-11-19 05:21:27,737 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] [2023-11-19 05:21:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2023-11-19 05:21:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3409. [2023-11-19 05:21:28,015 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) [2023-11-19 05:21:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4461 transitions. [2023-11-19 05:21:28,036 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4461 transitions. Word has length 261 [2023-11-19 05:21:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:28,037 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 4461 transitions. [2023-11-19 05:21:28,037 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) [2023-11-19 05:21:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4461 transitions. [2023-11-19 05:21:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-19 05:21:28,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:28,046 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] [2023-11-19 05:21:28,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 05:21:28,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:28,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:28,047 INFO L85 PathProgramCache]: Analyzing trace with hash -223414506, now seen corresponding path program 1 times [2023-11-19 05:21:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:28,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918064280] [2023-11-19 05:21:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-19 05:21:28,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918064280] [2023-11-19 05:21:28,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918064280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900677590] [2023-11-19 05:21:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:28,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:28,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:28,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:28,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:21:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:29,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 2395 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:21:29,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-19 05:21:30,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:30,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900677590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:30,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:30,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-11-19 05:21:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883165528] [2023-11-19 05:21:30,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:21:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:21:30,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:21:30,135 INFO L87 Difference]: Start difference. First operand 3409 states and 4461 transitions. Second operand has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 05:21:31,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:31,792 INFO L93 Difference]: Finished difference Result 4506 states and 5959 transitions. [2023-11-19 05:21:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:21:31,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) Word has length 265 [2023-11-19 05:21:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:31,822 INFO L225 Difference]: With dead ends: 4506 [2023-11-19 05:21:31,822 INFO L226 Difference]: Without dead ends: 4495 [2023-11-19 05:21:31,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:21:31,826 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 427 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 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 [2023-11-19 05:21:31,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 1967 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 05:21:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2023-11-19 05:21:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 3409. [2023-11-19 05:21:32,097 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) [2023-11-19 05:21:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4461 transitions. [2023-11-19 05:21:32,112 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4461 transitions. Word has length 265 [2023-11-19 05:21:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:32,113 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 4461 transitions. [2023-11-19 05:21:32,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 05:21:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4461 transitions. [2023-11-19 05:21:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-11-19 05:21:32,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:32,121 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, 1] [2023-11-19 05:21:32,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:32,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db1cea0-8ea1-4414-9c48-5598ea7cb309/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 05:21:32,341 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:32,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash 698512754, now seen corresponding path program 1 times [2023-11-19 05:21:32,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:32,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201737272] [2023-11-19 05:21:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:32,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-19 05:21:33,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:33,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201737272] [2023-11-19 05:21:33,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201737272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:33,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:21:33,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689942496] [2023-11-19 05:21:33,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:33,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:21:33,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:21:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:21:33,211 INFO L87 Difference]: Start difference. First operand 3409 states and 4461 transitions. Second operand has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34)