./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire --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 b0b334a11302bf275fa3309d3cd34d1e1506650a5df36f9442e98ab153dfb38d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:27,632 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:27,722 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:32:27,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:27,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:27,791 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:27,792 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:27,793 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:27,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:27,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:27,801 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:27,802 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:27,803 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:27,805 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:27,806 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:27,806 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:27,807 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:27,807 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:27,808 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:27,809 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:27,809 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:27,810 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:27,811 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:27,812 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:27,813 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:27,813 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:27,814 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:27,814 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:27,815 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:27,815 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:27,817 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:27,817 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:27,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:27,818 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:27,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:27,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:27,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:27,819 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:27,820 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:27,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:27,820 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:27,821 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:27,821 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:27,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:27,822 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_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0b334a11302bf275fa3309d3cd34d1e1506650a5df36f9442e98ab153dfb38d [2023-11-23 20:32:28,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:28,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:28,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:28,235 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:28,236 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:28,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2023-11-23 20:32:32,306 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:33,025 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:33,026 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2023-11-23 20:32:33,080 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/data/dd8d7884e/0dd733e67e8e4e79be47158d3ab4d4b9/FLAGf6a585277 [2023-11-23 20:32:33,109 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/data/dd8d7884e/0dd733e67e8e4e79be47158d3ab4d4b9 [2023-11-23 20:32:33,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:33,123 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:33,128 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:33,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:33,137 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:33,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:33" (1/1) ... [2023-11-23 20:32:33,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0e15e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:33, skipping insertion in model container [2023-11-23 20:32:33,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:33" (1/1) ... [2023-11-23 20:32:33,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:34,011 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3460] [2023-11-23 20:32:34,012 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3461-3462] [2023-11-23 20:32:34,343 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_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[104435,104448] [2023-11-23 20:32:35,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:35,114 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:35,238 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3460] [2023-11-23 20:32:35,239 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3461-3462] [2023-11-23 20:32:35,268 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_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[104435,104448] [2023-11-23 20:32:35,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:35,548 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:35,557 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:35,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35 WrapperNode [2023-11-23 20:32:35,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:35,560 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:35,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:35,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:35,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:35,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:35,845 INFO L138 Inliner]: procedures = 139, calls = 844, calls flagged for inlining = 60, calls inlined = 49, statements flattened = 1802 [2023-11-23 20:32:35,846 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:35,847 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:35,847 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:35,847 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:35,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:35,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:35,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:35,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:35,999 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:36,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:36,021 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:36,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:36,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:36,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:36,052 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:36,052 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:36,053 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (1/1) ... [2023-11-23 20:32:36,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:36,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:36,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:32:36,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 20:32:36,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 20:32:36,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:32:36,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:32:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:32:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_alloc [2023-11-23 20:32:36,173 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_alloc [2023-11-23 20:32:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 20:32:36,173 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 20:32:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-23 20:32:36,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-23 20:32:36,175 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:32:36,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:32:36,176 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_dealloc_kioc [2023-11-23 20:32:36,176 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_dealloc_kioc [2023-11-23 20:32:36,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-23 20:32:36,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-23 20:32:36,178 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_attach_buf [2023-11-23 20:32:36,178 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_attach_buf [2023-11-23 20:32:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-23 20:32:36,180 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-23 20:32:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:32:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2023-11-23 20:32:36,181 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2023-11-23 20:32:36,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:32:36,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:32:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:32:36,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:32:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 20:32:36,183 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 20:32:36,184 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_ioctl [2023-11-23 20:32:36,184 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_ioctl [2023-11-23 20:32:36,185 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:32:36,185 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:32:36,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:32:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-11-23 20:32:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-11-23 20:32:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-23 20:32:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-23 20:32:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:32:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:32:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 20:32:36,187 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 20:32:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 20:32:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2023-11-23 20:32:36,188 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2023-11-23 20:32:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2023-11-23 20:32:36,188 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2023-11-23 20:32:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure up [2023-11-23 20:32:36,189 INFO L138 BoogieDeclarations]: Found implementation of procedure up [2023-11-23 20:32:36,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:32:36,189 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-23 20:32:36,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-23 20:32:36,190 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 20:32:36,191 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 20:32:36,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:32:36,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:32:36,193 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 20:32:36,193 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 20:32:36,193 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:32:36,194 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:32:36,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:32:36,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 20:32:36,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 20:32:36,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 20:32:36,195 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 20:32:36,195 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 20:32:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:36,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_free [2023-11-23 20:32:36,196 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_free [2023-11-23 20:32:36,723 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:32:36,731 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:32:37,104 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:32:38,913 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:32:39,458 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:32:39,459 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:32:39,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:39 BoogieIcfgContainer [2023-11-23 20:32:39,461 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:32:39,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:32:39,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:32:39,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:32:39,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:33" (1/3) ... [2023-11-23 20:32:39,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315d9514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:39, skipping insertion in model container [2023-11-23 20:32:39,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:35" (2/3) ... [2023-11-23 20:32:39,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315d9514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:39, skipping insertion in model container [2023-11-23 20:32:39,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:39" (3/3) ... [2023-11-23 20:32:39,478 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2023-11-23 20:32:39,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:32:39,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:32:39,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:32:39,612 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;@9d27b83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:32:39,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:32:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 334 states, 228 states have (on average 1.4385964912280702) internal successors, (328), 236 states have internal predecessors, (328), 77 states have call successors, (77), 28 states have call predecessors, (77), 27 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-23 20:32:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 20:32:39,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:39,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-23 20:32:39,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:39,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:39,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1294067834, now seen corresponding path program 1 times [2023-11-23 20:32:39,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:39,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851314723] [2023-11-23 20:32:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:39,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-23 20:32:40,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:40,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851314723] [2023-11-23 20:32:40,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851314723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:40,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:40,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029304329] [2023-11-23 20:32:40,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:40,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:40,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:40,868 INFO L87 Difference]: Start difference. First operand has 334 states, 228 states have (on average 1.4385964912280702) internal successors, (328), 236 states have internal predecessors, (328), 77 states have call successors, (77), 28 states have call predecessors, (77), 27 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 20:32:42,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:42,410 INFO L93 Difference]: Finished difference Result 703 states and 1016 transitions. [2023-11-23 20:32:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 110 [2023-11-23 20:32:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:42,429 INFO L225 Difference]: With dead ends: 703 [2023-11-23 20:32:42,429 INFO L226 Difference]: Without dead ends: 351 [2023-11-23 20:32:42,438 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 [2023-11-23 20:32:42,442 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 46 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:42,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 806 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 20:32:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-23 20:32:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2023-11-23 20:32:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 244 states have (on average 1.4180327868852458) internal successors, (346), 248 states have internal predecessors, (346), 76 states have call successors, (76), 29 states have call predecessors, (76), 28 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-23 20:32:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 497 transitions. [2023-11-23 20:32:42,540 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 497 transitions. Word has length 110 [2023-11-23 20:32:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:42,541 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 497 transitions. [2023-11-23 20:32:42,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 20:32:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 497 transitions. [2023-11-23 20:32:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-23 20:32:42,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:42,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-23 20:32:42,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:32:42,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:42,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1966468307, now seen corresponding path program 1 times [2023-11-23 20:32:42,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:42,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852118794] [2023-11-23 20:32:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-23 20:32:43,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852118794] [2023-11-23 20:32:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852118794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:43,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:43,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145218273] [2023-11-23 20:32:43,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:43,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:43,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:43,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:43,221 INFO L87 Difference]: Start difference. First operand 349 states and 497 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 20:32:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:43,729 INFO L93 Difference]: Finished difference Result 697 states and 995 transitions. [2023-11-23 20:32:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 136 [2023-11-23 20:32:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:43,739 INFO L225 Difference]: With dead ends: 697 [2023-11-23 20:32:43,741 INFO L226 Difference]: Without dead ends: 349 [2023-11-23 20:32:43,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:43,749 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 445 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:43,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 378 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:32:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-23 20:32:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2023-11-23 20:32:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 244 states have (on average 1.3811475409836065) internal successors, (337), 248 states have internal predecessors, (337), 76 states have call successors, (76), 29 states have call predecessors, (76), 28 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-23 20:32:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 488 transitions. [2023-11-23 20:32:43,820 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 488 transitions. Word has length 136 [2023-11-23 20:32:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:43,822 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 488 transitions. [2023-11-23 20:32:43,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 20:32:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 488 transitions. [2023-11-23 20:32:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 20:32:43,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:43,829 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-23 20:32:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:32:43,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:43,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1276589272, now seen corresponding path program 1 times [2023-11-23 20:32:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:43,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191591744] [2023-11-23 20:32:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:43,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-23 20:32:44,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191591744] [2023-11-23 20:32:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191591744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:44,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:44,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:44,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3464604] [2023-11-23 20:32:44,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:44,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:44,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:44,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:44,284 INFO L87 Difference]: Start difference. First operand 349 states and 488 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 20:32:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:46,114 INFO L93 Difference]: Finished difference Result 738 states and 1031 transitions. [2023-11-23 20:32:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:46,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 146 [2023-11-23 20:32:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:46,119 INFO L225 Difference]: With dead ends: 738 [2023-11-23 20:32:46,119 INFO L226 Difference]: Without dead ends: 390 [2023-11-23 20:32:46,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:46,122 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 56 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:46,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 773 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 20:32:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-23 20:32:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2023-11-23 20:32:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 276 states have (on average 1.3840579710144927) internal successors, (382), 281 states have internal predecessors, (382), 79 states have call successors, (79), 33 states have call predecessors, (79), 32 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-23 20:32:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 539 transitions. [2023-11-23 20:32:46,155 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 539 transitions. Word has length 146 [2023-11-23 20:32:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:46,156 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 539 transitions. [2023-11-23 20:32:46,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 20:32:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 539 transitions. [2023-11-23 20:32:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-23 20:32:46,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:46,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:46,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:32:46,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:46,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:46,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1053780767, now seen corresponding path program 1 times [2023-11-23 20:32:46,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:46,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53269013] [2023-11-23 20:32:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:46,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 20:32:46,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:46,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53269013] [2023-11-23 20:32:46,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53269013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:46,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:46,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142900420] [2023-11-23 20:32:46,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:46,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:32:46,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:32:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:32:46,917 INFO L87 Difference]: Start difference. First operand 388 states and 539 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 20:32:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:48,386 INFO L93 Difference]: Finished difference Result 779 states and 1085 transitions. [2023-11-23 20:32:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:32:48,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 151 [2023-11-23 20:32:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:48,391 INFO L225 Difference]: With dead ends: 779 [2023-11-23 20:32:48,392 INFO L226 Difference]: Without dead ends: 392 [2023-11-23 20:32:48,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:48,395 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 3 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:48,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1153 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 20:32:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-23 20:32:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 390. [2023-11-23 20:32:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 278 states have (on average 1.381294964028777) internal successors, (384), 283 states have internal predecessors, (384), 79 states have call successors, (79), 33 states have call predecessors, (79), 32 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-23 20:32:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 541 transitions. [2023-11-23 20:32:48,448 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 541 transitions. Word has length 151 [2023-11-23 20:32:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:48,450 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 541 transitions. [2023-11-23 20:32:48,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 20:32:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 541 transitions. [2023-11-23 20:32:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-23 20:32:48,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:48,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:48,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:32:48,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:48,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:48,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1829705031, now seen corresponding path program 1 times [2023-11-23 20:32:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:48,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163081166] [2023-11-23 20:32:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:48,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-23 20:32:49,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163081166] [2023-11-23 20:32:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163081166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:49,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:49,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750924500] [2023-11-23 20:32:49,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:49,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:32:49,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:32:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:32:49,290 INFO L87 Difference]: Start difference. First operand 390 states and 541 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:32:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:51,320 INFO L93 Difference]: Finished difference Result 783 states and 1089 transitions. [2023-11-23 20:32:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:32:51,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 172 [2023-11-23 20:32:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:51,325 INFO L225 Difference]: With dead ends: 783 [2023-11-23 20:32:51,325 INFO L226 Difference]: Without dead ends: 394 [2023-11-23 20:32:51,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:51,328 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 3 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:51,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1153 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 20:32:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-23 20:32:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 390. [2023-11-23 20:32:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 278 states have (on average 1.381294964028777) internal successors, (384), 283 states have internal predecessors, (384), 79 states have call successors, (79), 33 states have call predecessors, (79), 32 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-23 20:32:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 541 transitions. [2023-11-23 20:32:51,356 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 541 transitions. Word has length 172 [2023-11-23 20:32:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:51,357 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 541 transitions. [2023-11-23 20:32:51,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:32:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 541 transitions. [2023-11-23 20:32:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 20:32:51,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:51,361 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:51,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:32:51,362 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:51,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:51,363 INFO L85 PathProgramCache]: Analyzing trace with hash -847670899, now seen corresponding path program 1 times [2023-11-23 20:32:51,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:51,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232669109] [2023-11-23 20:32:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:51,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-23 20:32:51,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:51,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232669109] [2023-11-23 20:32:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232669109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:51,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:51,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878383725] [2023-11-23 20:32:51,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:51,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:51,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:51,763 INFO L87 Difference]: Start difference. First operand 390 states and 541 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:32:54,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:54,434 INFO L93 Difference]: Finished difference Result 790 states and 1105 transitions. [2023-11-23 20:32:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 174 [2023-11-23 20:32:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:54,440 INFO L225 Difference]: With dead ends: 790 [2023-11-23 20:32:54,441 INFO L226 Difference]: Without dead ends: 401 [2023-11-23 20:32:54,443 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 [2023-11-23 20:32:54,445 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 8 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:54,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 782 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-23 20:32:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-23 20:32:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 391. [2023-11-23 20:32:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 279 states have (on average 1.3799283154121864) internal successors, (385), 284 states have internal predecessors, (385), 79 states have call successors, (79), 33 states have call predecessors, (79), 32 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-23 20:32:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 542 transitions. [2023-11-23 20:32:54,482 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 542 transitions. Word has length 174 [2023-11-23 20:32:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:54,485 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 542 transitions. [2023-11-23 20:32:54,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:32:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 542 transitions. [2023-11-23 20:32:54,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-23 20:32:54,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:54,490 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:54,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:32:54,490 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:54,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:54,491 INFO L85 PathProgramCache]: Analyzing trace with hash 115864281, now seen corresponding path program 1 times [2023-11-23 20:32:54,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:54,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686250098] [2023-11-23 20:32:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-23 20:32:54,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686250098] [2023-11-23 20:32:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686250098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:54,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687084234] [2023-11-23 20:32:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:54,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:54,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:54,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:54,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:32:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:55,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:32:55,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 20:32:55,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687084234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:55,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:32:55,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 20:32:55,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90904802] [2023-11-23 20:32:55,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:55,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:55,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:55,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:55,692 INFO L87 Difference]: Start difference. First operand 391 states and 542 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:32:57,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:57,438 INFO L93 Difference]: Finished difference Result 787 states and 1099 transitions. [2023-11-23 20:32:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 173 [2023-11-23 20:32:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:57,444 INFO L225 Difference]: With dead ends: 787 [2023-11-23 20:32:57,445 INFO L226 Difference]: Without dead ends: 397 [2023-11-23 20:32:57,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:57,448 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 2 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:57,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 765 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 20:32:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-23 20:32:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2023-11-23 20:32:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 283 states have (on average 1.3816254416961131) internal successors, (391), 288 states have internal predecessors, (391), 79 states have call successors, (79), 33 states have call predecessors, (79), 32 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-23 20:32:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 548 transitions. [2023-11-23 20:32:57,477 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 548 transitions. Word has length 173 [2023-11-23 20:32:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:57,478 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 548 transitions. [2023-11-23 20:32:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:32:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 548 transitions. [2023-11-23 20:32:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-23 20:32:57,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:57,484 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:57,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:57,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:57,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:57,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash 540358839, now seen corresponding path program 1 times [2023-11-23 20:32:57,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510652171] [2023-11-23 20:32:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-23 20:32:58,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:58,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510652171] [2023-11-23 20:32:58,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510652171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:58,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828155630] [2023-11-23 20:32:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:58,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:58,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:58,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:58,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d3d61b5-3b12-4fcd-931a-8c0d66e06a7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:32:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:59,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:32:59,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-23 20:32:59,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:32:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-23 20:32:59,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828155630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:32:59,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593741498] [2023-11-23 20:32:59,341 INFO L159 IcfgInterpreter]: Started Sifa with 116 locations of interest [2023-11-23 20:32:59,341 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:32:59,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:32:59,353 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:32:59,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs