./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.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_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/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_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/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_96f40726-9816-4a30-a166-3c6ad78b96c4/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 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:06:16,199 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:06:16,311 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:06:16,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:06:16,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:06:16,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:06:16,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:06:16,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:06:16,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:06:16,362 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:06:16,362 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:06:16,363 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:06:16,364 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:06:16,365 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:06:16,366 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:06:16,366 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:06:16,366 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:06:16,367 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:06:16,367 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:06:16,368 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:06:16,368 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:06:16,369 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:06:16,370 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:06:16,370 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:06:16,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:06:16,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:06:16,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:06:16,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:06:16,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:06:16,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:06:16,374 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:06:16,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:06:16,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:06:16,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:06:16,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:06:16,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:06:16,375 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:06:16,375 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:06:16,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:06:16,376 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:06:16,376 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:06:16,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:06:16,377 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_96f40726-9816-4a30-a166-3c6ad78b96c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b [2023-11-19 05:06:16,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:06:16,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:06:16,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:06:16,778 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:06:16,779 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:06:16,780 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-19 05:06:20,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:06:20,625 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:06:20,627 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-19 05:06:20,671 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/data/64420430f/597eb8939ffd447398285435a12b5a89/FLAG6ee13c7e0 [2023-11-19 05:06:20,691 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/data/64420430f/597eb8939ffd447398285435a12b5a89 [2023-11-19 05:06:20,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:06:20,699 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:06:20,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:06:20,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:06:20,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:06:20,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:06:20" (1/1) ... [2023-11-19 05:06:20,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b62f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:20, skipping insertion in model container [2023-11-19 05:06:20,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:06:20" (1/1) ... [2023-11-19 05:06:20,832 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:06:21,772 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_96f40726-9816-4a30-a166-3c6ad78b96c4/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2023-11-19 05:06:21,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:06:21,940 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:06:22,207 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_96f40726-9816-4a30-a166-3c6ad78b96c4/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2023-11-19 05:06:22,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:06:22,287 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:06:22,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22 WrapperNode [2023-11-19 05:06:22,288 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:06:22,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:06:22,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:06:22,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:06:22,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,486 INFO L138 Inliner]: procedures = 109, calls = 320, calls flagged for inlining = 49, calls inlined = 43, statements flattened = 860 [2023-11-19 05:06:22,486 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:06:22,487 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:06:22,487 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:06:22,488 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:06:22,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,498 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,623 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,631 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:06:22,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:06:22,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:06:22,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:06:22,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (1/1) ... [2023-11-19 05:06:22,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:06:22,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:22,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:06:22,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:06:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 05:06:22,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 05:06:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:06:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 05:06:22,775 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 05:06:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:06:22,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:06:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 05:06:22,775 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 05:06:22,777 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2023-11-19 05:06:22,778 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2023-11-19 05:06:22,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:06:22,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:06:22,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:06:22,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 05:06:22,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 05:06:22,779 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2023-11-19 05:06:22,779 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2023-11-19 05:06:22,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 05:06:22,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 05:06:22,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:06:22,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:06:22,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:06:22,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:06:22,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-19 05:06:22,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-19 05:06:22,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:06:22,783 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2023-11-19 05:06:22,784 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2023-11-19 05:06:22,784 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-19 05:06:22,784 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-19 05:06:22,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2023-11-19 05:06:22,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2023-11-19 05:06:22,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:06:22,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:06:22,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:06:22,785 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 05:06:22,786 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 05:06:22,786 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-19 05:06:22,786 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-19 05:06:22,786 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 05:06:22,786 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 05:06:22,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:06:22,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:06:22,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:06:23,116 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:06:23,119 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:06:23,294 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 05:06:24,386 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:06:24,813 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:06:24,814 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:06:24,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:06:24 BoogieIcfgContainer [2023-11-19 05:06:24,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:06:24,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:06:24,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:06:24,828 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:06:24,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:06:20" (1/3) ... [2023-11-19 05:06:24,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbf0b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:06:24, skipping insertion in model container [2023-11-19 05:06:24,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:22" (2/3) ... [2023-11-19 05:06:24,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbf0b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:06:24, skipping insertion in model container [2023-11-19 05:06:24,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:06:24" (3/3) ... [2023-11-19 05:06:24,832 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-19 05:06:24,854 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:06:24,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:06:24,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:06:24,922 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;@46ffde8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:06:24,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:06:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 116 states have internal predecessors, (148), 44 states have call successors, (44), 17 states have call predecessors, (44), 16 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 05:06:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 05:06:24,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:24,940 INFO L195 NwaCegarLoop]: trace histogram [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 05:06:24,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:24,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1461403808, now seen corresponding path program 1 times [2023-11-19 05:06:24,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238801690] [2023-11-19 05:06:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:25,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:25,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238801690] [2023-11-19 05:06:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238801690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:25,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:25,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453721199] [2023-11-19 05:06:25,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:25,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:06:25,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:25,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:06:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:06:25,654 INFO L87 Difference]: Start difference. First operand has 167 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 116 states have internal predecessors, (148), 44 states have call successors, (44), 17 states have call predecessors, (44), 16 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:06:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:26,864 INFO L93 Difference]: Finished difference Result 471 states and 656 transitions. [2023-11-19 05:06:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:06:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-11-19 05:06:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:26,896 INFO L225 Difference]: With dead ends: 471 [2023-11-19 05:06:26,896 INFO L226 Difference]: Without dead ends: 295 [2023-11-19 05:06:26,907 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 05:06:26,917 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 197 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:26,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 368 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:06:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-19 05:06:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-11-19 05:06:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 192 states have (on average 1.34375) internal successors, (258), 199 states have internal predecessors, (258), 73 states have call successors, (73), 30 states have call predecessors, (73), 29 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-19 05:06:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 400 transitions. [2023-11-19 05:06:27,019 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 400 transitions. Word has length 23 [2023-11-19 05:06:27,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:27,020 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 400 transitions. [2023-11-19 05:06:27,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:06:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 400 transitions. [2023-11-19 05:06:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 05:06:27,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:27,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:27,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:06:27,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:27,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:27,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1610051832, now seen corresponding path program 1 times [2023-11-19 05:06:27,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:27,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523103054] [2023-11-19 05:06:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:27,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:06:27,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:27,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523103054] [2023-11-19 05:06:27,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523103054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:27,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:27,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:27,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122186073] [2023-11-19 05:06:27,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:27,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:06:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:06:27,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:06:27,319 INFO L87 Difference]: Start difference. First operand 295 states and 400 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:06:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:28,509 INFO L93 Difference]: Finished difference Result 487 states and 651 transitions. [2023-11-19 05:06:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:06:28,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-11-19 05:06:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:28,516 INFO L225 Difference]: With dead ends: 487 [2023-11-19 05:06:28,517 INFO L226 Difference]: Without dead ends: 484 [2023-11-19 05:06:28,518 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 05:06:28,520 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 131 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:28,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 343 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 05:06:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-11-19 05:06:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 480. [2023-11-19 05:06:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 316 states have (on average 1.3386075949367089) internal successors, (423), 329 states have internal predecessors, (423), 113 states have call successors, (113), 51 states have call predecessors, (113), 50 states have return successors, (109), 107 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-19 05:06:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 645 transitions. [2023-11-19 05:06:28,621 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 645 transitions. Word has length 39 [2023-11-19 05:06:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:28,622 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 645 transitions. [2023-11-19 05:06:28,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:06:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 645 transitions. [2023-11-19 05:06:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 05:06:28,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:28,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:28,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:06:28,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:28,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:28,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1627990270, now seen corresponding path program 1 times [2023-11-19 05:06:28,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:28,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660456621] [2023-11-19 05:06:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:06:28,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:28,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660456621] [2023-11-19 05:06:28,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660456621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:28,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:28,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:28,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744971452] [2023-11-19 05:06:28,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:06:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:06:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:06:28,804 INFO L87 Difference]: Start difference. First operand 480 states and 645 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:06:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:29,252 INFO L93 Difference]: Finished difference Result 482 states and 646 transitions. [2023-11-19 05:06:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:06:29,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-11-19 05:06:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:29,261 INFO L225 Difference]: With dead ends: 482 [2023-11-19 05:06:29,262 INFO L226 Difference]: Without dead ends: 479 [2023-11-19 05:06:29,263 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 05:06:29,264 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 197 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:29,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 175 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:06:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-19 05:06:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2023-11-19 05:06:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 316 states have (on average 1.3354430379746836) internal successors, (422), 328 states have internal predecessors, (422), 112 states have call successors, (112), 51 states have call predecessors, (112), 50 states have return successors, (109), 107 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-19 05:06:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 643 transitions. [2023-11-19 05:06:29,317 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 643 transitions. Word has length 40 [2023-11-19 05:06:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:29,318 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 643 transitions. [2023-11-19 05:06:29,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:06:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 643 transitions. [2023-11-19 05:06:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 05:06:29,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:29,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:29,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:06:29,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:29,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1071924539, now seen corresponding path program 1 times [2023-11-19 05:06:29,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:29,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337481284] [2023-11-19 05:06:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:29,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:06:29,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:29,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337481284] [2023-11-19 05:06:29,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337481284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:29,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:29,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441563271] [2023-11-19 05:06:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:29,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:06:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:06:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:06:29,451 INFO L87 Difference]: Start difference. First operand 479 states and 643 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:06:30,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:06:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:30,783 INFO L93 Difference]: Finished difference Result 481 states and 644 transitions. [2023-11-19 05:06:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:06:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2023-11-19 05:06:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:30,788 INFO L225 Difference]: With dead ends: 481 [2023-11-19 05:06:30,789 INFO L226 Difference]: Without dead ends: 478 [2023-11-19 05:06:30,789 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 05:06:30,790 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 194 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:30,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 173 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 05:06:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-11-19 05:06:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2023-11-19 05:06:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 316 states have (on average 1.3322784810126582) internal successors, (421), 327 states have internal predecessors, (421), 111 states have call successors, (111), 51 states have call predecessors, (111), 50 states have return successors, (109), 107 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-19 05:06:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 641 transitions. [2023-11-19 05:06:30,856 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 641 transitions. Word has length 41 [2023-11-19 05:06:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:30,857 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 641 transitions. [2023-11-19 05:06:30,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:06:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 641 transitions. [2023-11-19 05:06:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 05:06:30,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:30,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:30,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:06:30,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:30,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:30,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1130057435, now seen corresponding path program 1 times [2023-11-19 05:06:30,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:30,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215119030] [2023-11-19 05:06:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:30,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:06:30,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:30,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215119030] [2023-11-19 05:06:30,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215119030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:30,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:30,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675062106] [2023-11-19 05:06:30,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:30,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:06:30,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:30,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:06:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:06:30,956 INFO L87 Difference]: Start difference. First operand 478 states and 641 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:06:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:31,870 INFO L93 Difference]: Finished difference Result 480 states and 642 transitions. [2023-11-19 05:06:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:06:31,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-11-19 05:06:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:31,876 INFO L225 Difference]: With dead ends: 480 [2023-11-19 05:06:31,876 INFO L226 Difference]: Without dead ends: 472 [2023-11-19 05:06:31,877 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 05:06:31,878 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:31,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 172 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:06:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-11-19 05:06:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2023-11-19 05:06:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 311 states have (on average 1.3279742765273312) internal successors, (413), 321 states have internal predecessors, (413), 110 states have call successors, (110), 51 states have call predecessors, (110), 50 states have return successors, (109), 107 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-19 05:06:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 632 transitions. [2023-11-19 05:06:31,926 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 632 transitions. Word has length 42 [2023-11-19 05:06:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:31,927 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 632 transitions. [2023-11-19 05:06:31,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:06:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 632 transitions. [2023-11-19 05:06:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 05:06:31,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:31,931 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:31,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:06:31,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:31,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -12530782, now seen corresponding path program 1 times [2023-11-19 05:06:31,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:31,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610609096] [2023-11-19 05:06:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:31,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-19 05:06:32,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:32,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610609096] [2023-11-19 05:06:32,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610609096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:32,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:32,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:32,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464809267] [2023-11-19 05:06:32,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:32,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:06:32,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:06:32,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:06:32,166 INFO L87 Difference]: Start difference. First operand 472 states and 632 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:06:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:33,110 INFO L93 Difference]: Finished difference Result 772 states and 1032 transitions. [2023-11-19 05:06:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:06:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 110 [2023-11-19 05:06:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:33,115 INFO L225 Difference]: With dead ends: 772 [2023-11-19 05:06:33,115 INFO L226 Difference]: Without dead ends: 311 [2023-11-19 05:06:33,117 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 05:06:33,118 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 31 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:33,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 330 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:06:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-19 05:06:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 306. [2023-11-19 05:06:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 212 states have (on average 1.3396226415094339) internal successors, (284), 217 states have internal predecessors, (284), 61 states have call successors, (61), 33 states have call predecessors, (61), 32 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 05:06:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 405 transitions. [2023-11-19 05:06:33,146 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 405 transitions. Word has length 110 [2023-11-19 05:06:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:33,147 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 405 transitions. [2023-11-19 05:06:33,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:06:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 405 transitions. [2023-11-19 05:06:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-19 05:06:33,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:33,149 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:33,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:06:33,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:33,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1613487388, now seen corresponding path program 1 times [2023-11-19 05:06:33,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:33,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541311355] [2023-11-19 05:06:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:33,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 05:06:33,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541311355] [2023-11-19 05:06:33,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541311355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024618478] [2023-11-19 05:06:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:33,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:33,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:33,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:33,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:06:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:34,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:06:34,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-19 05:06:34,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:06:34,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024618478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:34,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:06:34,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-19 05:06:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244255166] [2023-11-19 05:06:34,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:34,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:06:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:06:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:06:34,417 INFO L87 Difference]: Start difference. First operand 306 states and 405 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:06:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:35,557 INFO L93 Difference]: Finished difference Result 595 states and 789 transitions. [2023-11-19 05:06:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:06:35,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 116 [2023-11-19 05:06:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:35,561 INFO L225 Difference]: With dead ends: 595 [2023-11-19 05:06:35,561 INFO L226 Difference]: Without dead ends: 313 [2023-11-19 05:06:35,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:06:35,563 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 5 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:35,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 509 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 05:06:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-19 05:06:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2023-11-19 05:06:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 214 states have (on average 1.3317757009345794) internal successors, (285), 219 states have internal predecessors, (285), 61 states have call successors, (61), 33 states have call predecessors, (61), 32 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 05:06:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 406 transitions. [2023-11-19 05:06:35,585 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 406 transitions. Word has length 116 [2023-11-19 05:06:35,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:35,585 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 406 transitions. [2023-11-19 05:06:35,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:06:35,585 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 406 transitions. [2023-11-19 05:06:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-19 05:06:35,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:35,588 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:35,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:35,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:06:35,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:35,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:35,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1585942576, now seen corresponding path program 1 times [2023-11-19 05:06:35,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:35,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429218338] [2023-11-19 05:06:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 05:06:36,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:36,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429218338] [2023-11-19 05:06:36,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429218338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:36,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538399179] [2023-11-19 05:06:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:36,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:36,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:36,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:36,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f40726-9816-4a30-a166-3c6ad78b96c4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:06:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:37,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 05:06:37,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:06:37,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 05:06:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538399179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650928938] [2023-11-19 05:06:37,881 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-11-19 05:06:37,881 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:06:37,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:06:37,896 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:06:37,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs