./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--pcmcia--pcmcia_rsrc.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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/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_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--pcmcia--pcmcia_rsrc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/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_62292863-0523-427e-baad-28e3310f21fd/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 afcb5021e5e481beab65460a6812c8dbe401f7b06cf3fcadf18504395cd90d4a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:16:59,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:16:59,386 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:16:59,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:16:59,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:16:59,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:16:59,443 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:16:59,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:16:59,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:16:59,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:16:59,451 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:16:59,453 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:16:59,453 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:16:59,455 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:16:59,456 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:16:59,456 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:16:59,457 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:16:59,457 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:16:59,458 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:16:59,458 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:16:59,459 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:16:59,460 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:16:59,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:16:59,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:16:59,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:16:59,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:16:59,463 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:16:59,463 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:16:59,464 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:16:59,464 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:16:59,466 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:16:59,466 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:16:59,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:16:59,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:16:59,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:59,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:16:59,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:16:59,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:16:59,468 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:16:59,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:16:59,469 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:16:59,469 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:16:59,469 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:16:59,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:16:59,470 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_62292863-0523-427e-baad-28e3310f21fd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afcb5021e5e481beab65460a6812c8dbe401f7b06cf3fcadf18504395cd90d4a [2023-11-23 21:16:59,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:16:59,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:16:59,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:16:59,843 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:16:59,843 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:16:59,845 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--pcmcia--pcmcia_rsrc.ko-entry_point.cil.out.i [2023-11-23 21:17:02,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:03,544 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:03,544 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--pcmcia--pcmcia_rsrc.ko-entry_point.cil.out.i [2023-11-23 21:17:03,599 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/data/fb3352fbc/7c752513a56a469b93c9c38a3ee555cf/FLAG422f42d36 [2023-11-23 21:17:04,016 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/data/fb3352fbc/7c752513a56a469b93c9c38a3ee555cf [2023-11-23 21:17:04,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:04,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:04,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:04,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:04,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:04,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:04" (1/1) ... [2023-11-23 21:17:04,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5283470e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:04, skipping insertion in model container [2023-11-23 21:17:04,036 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:04" (1/1) ... [2023-11-23 21:17:04,143 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:05,265 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_62292863-0523-427e-baad-28e3310f21fd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--pcmcia--pcmcia_rsrc.ko-entry_point.cil.out.i[136556,136569] [2023-11-23 21:17:05,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:05,431 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:05,598 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("movl %1,%0": "=r" (ret): "m" (*((unsigned int volatile *)addr)): "memory"); [3154] [2023-11-23 21:17:05,820 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_62292863-0523-427e-baad-28e3310f21fd/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--pcmcia--pcmcia_rsrc.ko-entry_point.cil.out.i[136556,136569] [2023-11-23 21:17:05,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:05,933 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:05,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05 WrapperNode [2023-11-23 21:17:05,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:05,935 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:05,935 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:05,935 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:05,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,037 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,150 INFO L138 Inliner]: procedures = 173, calls = 880, calls flagged for inlining = 50, calls inlined = 47, statements flattened = 2211 [2023-11-23 21:17:06,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:06,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:06,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:06,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:06,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,195 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,196 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,401 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,431 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,451 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:06,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:06,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:06,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:06,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (1/1) ... [2023-11-23 21:17:06,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:06,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:06,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:06,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62292863-0523-427e-baad-28e3310f21fd/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-11-23 21:17:06,566 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-11-23 21:17:06,566 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-23 21:17:06,566 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-23 21:17:06,566 INFO L130 BoogieDeclarations]: Found specification of procedure pci_bus_alloc_resource [2023-11-23 21:17:06,567 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_bus_alloc_resource [2023-11-23 21:17:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure add_interval [2023-11-23 21:17:06,569 INFO L138 BoogieDeclarations]: Found implementation of procedure add_interval [2023-11-23 21:17:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:17:06,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:17:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:17:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:17:06,570 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:17:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure sub_interval [2023-11-23 21:17:06,570 INFO L138 BoogieDeclarations]: Found implementation of procedure sub_interval [2023-11-23 21:17:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:17:06,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:17:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure nonstatic_find_mem_region [2023-11-23 21:17:06,571 INFO L138 BoogieDeclarations]: Found implementation of procedure nonstatic_find_mem_region [2023-11-23 21:17:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:17:06,571 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:17:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure free_region [2023-11-23 21:17:06,572 INFO L138 BoogieDeclarations]: Found implementation of procedure free_region [2023-11-23 21:17:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_7 [2023-11-23 21:17:06,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_7 [2023-11-23 21:17:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:17:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:17:06,573 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:17:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure __nonstatic_adjust_io_region [2023-11-23 21:17:06,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __nonstatic_adjust_io_region [2023-11-23 21:17:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:17:06,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:17:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:17:06,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:17:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_6 [2023-11-23 21:17:06,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_6 [2023-11-23 21:17:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 21:17:06,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 21:17:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure nonstatic_release_resource_db [2023-11-23 21:17:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure nonstatic_release_resource_db [2023-11-23 21:17:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure do_mem_probe [2023-11-23 21:17:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure do_mem_probe [2023-11-23 21:17:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_make_resource [2023-11-23 21:17:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_make_resource [2023-11-23 21:17:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:17:06,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:17:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure nonstatic_init [2023-11-23 21:17:06,577 INFO L138 BoogieDeclarations]: Found implementation of procedure nonstatic_init [2023-11-23 21:17:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure nonstatic_find_io [2023-11-23 21:17:06,577 INFO L138 BoogieDeclarations]: Found implementation of procedure nonstatic_find_io [2023-11-23 21:17:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:17:06,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:17:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:17:06,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:17:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:17:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 21:17:06,578 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 21:17:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 21:17:06,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 21:17:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure pccard_sysfs_add_rsrc [2023-11-23 21:17:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure pccard_sysfs_add_rsrc [2023-11-23 21:17:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure static_init [2023-11-23 21:17:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure static_init [2023-11-23 21:17:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:17:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:17:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure do_validate_mem [2023-11-23 21:17:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure do_validate_mem [2023-11-23 21:17:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_resource [2023-11-23 21:17:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_resource [2023-11-23 21:17:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_nonstatic_validate_mem [2023-11-23 21:17:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_nonstatic_validate_mem [2023-11-23 21:17:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:17:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure static_find_io [2023-11-23 21:17:06,584 INFO L138 BoogieDeclarations]: Found implementation of procedure static_find_io [2023-11-23 21:17:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2023-11-23 21:17:06,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2023-11-23 21:17:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure show_mem_db [2023-11-23 21:17:06,584 INFO L138 BoogieDeclarations]: Found implementation of procedure show_mem_db [2023-11-23 21:17:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure adjust_io [2023-11-23 21:17:06,584 INFO L138 BoogieDeclarations]: Found implementation of procedure adjust_io [2023-11-23 21:17:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:17:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2023-11-23 21:17:06,585 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2023-11-23 21:17:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:17:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:17:06,586 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:17:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:17:06,586 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:17:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 21:17:06,587 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 21:17:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:17:06,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:17:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2023-11-23 21:17:06,587 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2023-11-23 21:17:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:17:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure resource_size [2023-11-23 21:17:06,588 INFO L138 BoogieDeclarations]: Found implementation of procedure resource_size [2023-11-23 21:17:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure adjust_memory [2023-11-23 21:17:06,588 INFO L138 BoogieDeclarations]: Found implementation of procedure adjust_memory [2023-11-23 21:17:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure adjust_resource [2023-11-23 21:17:06,588 INFO L138 BoogieDeclarations]: Found implementation of procedure adjust_resource [2023-11-23 21:17:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:06,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_ops_mutex_of_pcmcia_socket [2023-11-23 21:17:06,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_ops_mutex_of_pcmcia_socket [2023-11-23 21:17:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure claim_region [2023-11-23 21:17:06,589 INFO L138 BoogieDeclarations]: Found implementation of procedure claim_region [2023-11-23 21:17:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_ops_mutex_of_pcmcia_socket [2023-11-23 21:17:06,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_ops_mutex_of_pcmcia_socket [2023-11-23 21:17:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure show_io_db [2023-11-23 21:17:06,591 INFO L138 BoogieDeclarations]: Found implementation of procedure show_io_db [2023-11-23 21:17:07,079 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:07,084 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:07,358 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:17:09,164 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:09,880 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:09,880 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:17:09,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:09 BoogieIcfgContainer [2023-11-23 21:17:09,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:09,885 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:09,885 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:09,889 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:09,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:04" (1/3) ... [2023-11-23 21:17:09,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474fdd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:09, skipping insertion in model container [2023-11-23 21:17:09,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:05" (2/3) ... [2023-11-23 21:17:09,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474fdd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:09, skipping insertion in model container [2023-11-23 21:17:09,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:09" (3/3) ... [2023-11-23 21:17:09,893 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--pcmcia--pcmcia_rsrc.ko-entry_point.cil.out.i [2023-11-23 21:17:09,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:09,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:17:09,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:09,995 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;@2deeaaa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:09,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:17:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 456 states have (on average 1.4144736842105263) internal successors, (645), 474 states have internal predecessors, (645), 187 states have call successors, (187), 50 states have call predecessors, (187), 49 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2023-11-23 21:17:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-23 21:17:10,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:10,029 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:10,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:10,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:10,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1856050407, now seen corresponding path program 1 times [2023-11-23 21:17:10,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:10,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883807617] [2023-11-23 21:17:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:10,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2023-11-23 21:17:11,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883807617] [2023-11-23 21:17:11,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883807617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:11,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:11,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005723767] [2023-11-23 21:17:11,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:11,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:11,304 INFO L87 Difference]: Start difference. First operand has 694 states, 456 states have (on average 1.4144736842105263) internal successors, (645), 474 states have internal predecessors, (645), 187 states have call successors, (187), 50 states have call predecessors, (187), 49 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-23 21:17:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:12,415 INFO L93 Difference]: Finished difference Result 1951 states and 2888 transitions. [2023-11-23 21:17:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:12,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 192 [2023-11-23 21:17:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:12,456 INFO L225 Difference]: With dead ends: 1951 [2023-11-23 21:17:12,456 INFO L226 Difference]: Without dead ends: 1284 [2023-11-23 21:17:12,469 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 21:17:12,481 INFO L413 NwaCegarLoop]: 908 mSDtfsCounter, 875 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:12,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 1800 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:17:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2023-11-23 21:17:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1280. [2023-11-23 21:17:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 866 states have (on average 1.4030023094688222) internal successors, (1215), 876 states have internal predecessors, (1215), 317 states have call successors, (317), 97 states have call predecessors, (317), 96 states have return successors, (312), 312 states have call predecessors, (312), 312 states have call successors, (312) [2023-11-23 21:17:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1844 transitions. [2023-11-23 21:17:12,776 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1844 transitions. Word has length 192 [2023-11-23 21:17:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:12,778 INFO L495 AbstractCegarLoop]: Abstraction has 1280 states and 1844 transitions. [2023-11-23 21:17:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-23 21:17:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1844 transitions. [2023-11-23 21:17:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-23 21:17:12,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:12,784 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:12,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:12,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:12,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1777716518, now seen corresponding path program 1 times [2023-11-23 21:17:12,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:12,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900177859] [2023-11-23 21:17:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:12,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2023-11-23 21:17:13,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900177859] [2023-11-23 21:17:13,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900177859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:13,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:13,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:13,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669749663] [2023-11-23 21:17:13,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:13,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:13,141 INFO L87 Difference]: Start difference. First operand 1280 states and 1844 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-23 21:17:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:13,873 INFO L93 Difference]: Finished difference Result 3682 states and 5290 transitions. [2023-11-23 21:17:13,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:13,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 195 [2023-11-23 21:17:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:13,894 INFO L225 Difference]: With dead ends: 3682 [2023-11-23 21:17:13,895 INFO L226 Difference]: Without dead ends: 2451 [2023-11-23 21:17:13,900 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 21:17:13,902 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 919 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:13,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1684 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:17:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2023-11-23 21:17:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2439. [2023-11-23 21:17:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 1661 states have (on average 1.4081878386514148) internal successors, (2339), 1678 states have internal predecessors, (2339), 585 states have call successors, (585), 193 states have call predecessors, (585), 192 states have return successors, (580), 579 states have call predecessors, (580), 580 states have call successors, (580) [2023-11-23 21:17:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 3504 transitions. [2023-11-23 21:17:14,113 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 3504 transitions. Word has length 195 [2023-11-23 21:17:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:14,114 INFO L495 AbstractCegarLoop]: Abstraction has 2439 states and 3504 transitions. [2023-11-23 21:17:14,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-23 21:17:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 3504 transitions. [2023-11-23 21:17:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-23 21:17:14,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:14,122 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:14,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:17:14,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:14,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash 195746743, now seen corresponding path program 1 times [2023-11-23 21:17:14,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:14,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963427195] [2023-11-23 21:17:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2023-11-23 21:17:14,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:14,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963427195] [2023-11-23 21:17:14,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963427195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:14,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:14,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363082565] [2023-11-23 21:17:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:14,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:14,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:14,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:14,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:14,573 INFO L87 Difference]: Start difference. First operand 2439 states and 3504 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 21:17:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:14,978 INFO L93 Difference]: Finished difference Result 2441 states and 3505 transitions. [2023-11-23 21:17:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 194 [2023-11-23 21:17:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:15,000 INFO L225 Difference]: With dead ends: 2441 [2023-11-23 21:17:15,000 INFO L226 Difference]: Without dead ends: 2438 [2023-11-23 21:17:15,005 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 21:17:15,010 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 918 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:15,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 878 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:17:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2023-11-23 21:17:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2438. [2023-11-23 21:17:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 1661 states have (on average 1.407585791691752) internal successors, (2338), 1677 states have internal predecessors, (2338), 584 states have call successors, (584), 193 states have call predecessors, (584), 192 states have return successors, (580), 579 states have call predecessors, (580), 580 states have call successors, (580) [2023-11-23 21:17:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3502 transitions. [2023-11-23 21:17:15,243 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3502 transitions. Word has length 194 [2023-11-23 21:17:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:15,245 INFO L495 AbstractCegarLoop]: Abstraction has 2438 states and 3502 transitions. [2023-11-23 21:17:15,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 21:17:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3502 transitions. [2023-11-23 21:17:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-11-23 21:17:15,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:15,254 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:15,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:17:15,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:15,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash 561402445, now seen corresponding path program 1 times [2023-11-23 21:17:15,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:15,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847191110] [2023-11-23 21:17:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:15,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2023-11-23 21:17:15,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:15,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847191110] [2023-11-23 21:17:15,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847191110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:15,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:15,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:15,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700338508] [2023-11-23 21:17:15,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:15,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:15,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:15,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:15,628 INFO L87 Difference]: Start difference. First operand 2438 states and 3502 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-23 21:17:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:16,566 INFO L93 Difference]: Finished difference Result 7097 states and 10169 transitions. [2023-11-23 21:17:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 197 [2023-11-23 21:17:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:16,601 INFO L225 Difference]: With dead ends: 7097 [2023-11-23 21:17:16,601 INFO L226 Difference]: Without dead ends: 4708 [2023-11-23 21:17:16,611 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 21:17:16,614 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 906 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:16,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 1720 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:17:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2023-11-23 21:17:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4696. [2023-11-23 21:17:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 3211 states have (on average 1.4101526004360012) internal successors, (4528), 3241 states have internal predecessors, (4528), 1100 states have call successors, (1100), 385 states have call predecessors, (1100), 384 states have return successors, (1096), 1093 states have call predecessors, (1096), 1096 states have call successors, (1096) [2023-11-23 21:17:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 6724 transitions. [2023-11-23 21:17:16,936 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 6724 transitions. Word has length 197 [2023-11-23 21:17:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:16,937 INFO L495 AbstractCegarLoop]: Abstraction has 4696 states and 6724 transitions. [2023-11-23 21:17:16,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-23 21:17:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 6724 transitions. [2023-11-23 21:17:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-23 21:17:16,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:16,942 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:16,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:17:16,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:16,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:16,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1772858749, now seen corresponding path program 1 times [2023-11-23 21:17:16,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:16,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878220363] [2023-11-23 21:17:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:16,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2023-11-23 21:17:17,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:17,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878220363] [2023-11-23 21:17:17,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878220363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:17,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:17,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:17,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606532582] [2023-11-23 21:17:17,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:17,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:17,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:17,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:17,265 INFO L87 Difference]: Start difference. First operand 4696 states and 6724 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 21:17:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:17,929 INFO L93 Difference]: Finished difference Result 4698 states and 6725 transitions. [2023-11-23 21:17:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 195 [2023-11-23 21:17:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:17,975 INFO L225 Difference]: With dead ends: 4698 [2023-11-23 21:17:17,975 INFO L226 Difference]: Without dead ends: 4695 [2023-11-23 21:17:17,979 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 21:17:17,980 INFO L413 NwaCegarLoop]: 876 mSDtfsCounter, 915 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:17,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 876 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:17:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2023-11-23 21:17:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4695. [2023-11-23 21:17:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 3211 states have (on average 1.4098411709747742) internal successors, (4527), 3240 states have internal predecessors, (4527), 1099 states have call successors, (1099), 385 states have call predecessors, (1099), 384 states have return successors, (1096), 1093 states have call predecessors, (1096), 1096 states have call successors, (1096) [2023-11-23 21:17:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 6722 transitions. [2023-11-23 21:17:18,337 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 6722 transitions. Word has length 195 [2023-11-23 21:17:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:18,337 INFO L495 AbstractCegarLoop]: Abstraction has 4695 states and 6722 transitions. [2023-11-23 21:17:18,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 21:17:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 6722 transitions. [2023-11-23 21:17:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-23 21:17:18,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:18,341 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:17:18,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:18,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash -876271750, now seen corresponding path program 1 times [2023-11-23 21:17:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:18,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117551165] [2023-11-23 21:17:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2023-11-23 21:17:18,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:18,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117551165] [2023-11-23 21:17:18,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117551165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:18,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:18,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365750811] [2023-11-23 21:17:18,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:18,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:18,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:18,681 INFO L87 Difference]: Start difference. First operand 4695 states and 6722 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 21:17:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:19,521 INFO L93 Difference]: Finished difference Result 10279 states and 14744 transitions. [2023-11-23 21:17:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 196 [2023-11-23 21:17:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:19,596 INFO L225 Difference]: With dead ends: 10279 [2023-11-23 21:17:19,596 INFO L226 Difference]: Without dead ends: 5629 [2023-11-23 21:17:19,622 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 21:17:19,623 INFO L413 NwaCegarLoop]: 880 mSDtfsCounter, 862 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:19,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 1186 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:17:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2023-11-23 21:17:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 5599. [2023-11-23 21:17:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 3806 states have (on average 1.394114555964267) internal successors, (5306), 3850 states have internal predecessors, (5306), 1298 states have call successors, (1298), 508 states have call predecessors, (1298), 494 states have return successors, (1318), 1276 states have call predecessors, (1318), 1294 states have call successors, (1318) [2023-11-23 21:17:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 7922 transitions. [2023-11-23 21:17:20,185 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 7922 transitions. Word has length 196 [2023-11-23 21:17:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:20,186 INFO L495 AbstractCegarLoop]: Abstraction has 5599 states and 7922 transitions. [2023-11-23 21:17:20,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 21:17:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 7922 transitions. [2023-11-23 21:17:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-11-23 21:17:20,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:20,195 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:20,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:17:20,195 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:20,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1519983518, now seen corresponding path program 1 times [2023-11-23 21:17:20,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:20,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621184800] [2023-11-23 21:17:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:20,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2023-11-23 21:17:20,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621184800] [2023-11-23 21:17:20,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621184800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:20,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:20,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147760480] [2023-11-23 21:17:20,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:20,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:20,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:20,723 INFO L87 Difference]: Start difference. First operand 5599 states and 7922 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, (41), 2 states have call predecessors, (41), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-23 21:17:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:22,348 INFO L93 Difference]: Finished difference Result 16519 states and 23318 transitions. [2023-11-23 21:17:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:22,348 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, (41), 2 states have call predecessors, (41), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 275 [2023-11-23 21:17:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:22,440 INFO L225 Difference]: With dead ends: 16519 [2023-11-23 21:17:22,440 INFO L226 Difference]: Without dead ends: 10969 [2023-11-23 21:17:22,465 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 21:17:22,466 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 918 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:22,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1755 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:17:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10969 states. [2023-11-23 21:17:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10969 to 10959. [2023-11-23 21:17:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10959 states, 7444 states have (on average 1.3911875335840946) internal successors, (10356), 7532 states have internal predecessors, (10356), 2526 states have call successors, (2526), 1014 states have call predecessors, (2526), 988 states have return successors, (2570), 2484 states have call predecessors, (2570), 2522 states have call successors, (2570) [2023-11-23 21:17:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10959 states to 10959 states and 15452 transitions. [2023-11-23 21:17:23,338 INFO L78 Accepts]: Start accepts. Automaton has 10959 states and 15452 transitions. Word has length 275 [2023-11-23 21:17:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:23,340 INFO L495 AbstractCegarLoop]: Abstraction has 10959 states and 15452 transitions. [2023-11-23 21:17:23,340 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, (41), 2 states have call predecessors, (41), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-23 21:17:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 10959 states and 15452 transitions. [2023-11-23 21:17:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-11-23 21:17:23,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:23,347 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:23,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:17:23,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:23,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:23,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1782020655, now seen corresponding path program 1 times [2023-11-23 21:17:23,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:23,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891528748] [2023-11-23 21:17:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2023-11-23 21:17:23,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891528748] [2023-11-23 21:17:23,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891528748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:23,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:23,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:23,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147309820] [2023-11-23 21:17:23,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:23,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:23,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:23,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:23,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:23,773 INFO L87 Difference]: Start difference. First operand 10959 states and 15452 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, (41), 2 states have call predecessors, (41), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-23 21:17:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:26,194 INFO L93 Difference]: Finished difference Result 30390 states and 42771 transitions. [2023-11-23 21:17:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:26,195 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, (41), 2 states have call predecessors, (41), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 277 [2023-11-23 21:17:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:26,298 INFO L225 Difference]: With dead ends: 30390 [2023-11-23 21:17:26,299 INFO L226 Difference]: Without dead ends: 19480 [2023-11-23 21:17:26,347 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 21:17:26,348 INFO L413 NwaCegarLoop]: 1437 mSDtfsCounter, 892 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:26,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 2219 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:17:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19480 states. [2023-11-23 21:17:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19480 to 19471. [2023-11-23 21:17:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19471 states, 13216 states have (on average 1.3871065375302662) internal successors, (18332), 13376 states have internal predecessors, (18332), 4472 states have call successors, (4472), 1824 states have call predecessors, (4472), 1782 states have return successors, (4564), 4402 states have call predecessors, (4564), 4468 states have call successors, (4564) [2023-11-23 21:17:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19471 states to 19471 states and 27368 transitions. [2023-11-23 21:17:27,760 INFO L78 Accepts]: Start accepts. Automaton has 19471 states and 27368 transitions. Word has length 277 [2023-11-23 21:17:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:27,761 INFO L495 AbstractCegarLoop]: Abstraction has 19471 states and 27368 transitions. [2023-11-23 21:17:27,761 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, (41), 2 states have call predecessors, (41), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-23 21:17:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 19471 states and 27368 transitions. [2023-11-23 21:17:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2023-11-23 21:17:27,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:27,772 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:27,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:17:27,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:27,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1974207218, now seen corresponding path program 1 times [2023-11-23 21:17:27,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:27,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950549013] [2023-11-23 21:17:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2023-11-23 21:17:28,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950549013] [2023-11-23 21:17:28,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950549013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:28,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:28,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:28,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599013349] [2023-11-23 21:17:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:28,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:28,511 INFO L87 Difference]: Start difference. First operand 19471 states and 27368 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-11-23 21:17:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:30,581 INFO L93 Difference]: Finished difference Result 22375 states and 31156 transitions. [2023-11-23 21:17:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:30,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 339 [2023-11-23 21:17:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:30,685 INFO L225 Difference]: With dead ends: 22375 [2023-11-23 21:17:30,685 INFO L226 Difference]: Without dead ends: 18767 [2023-11-23 21:17:30,709 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 21:17:30,710 INFO L413 NwaCegarLoop]: 1036 mSDtfsCounter, 339 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:30,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1848 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:17:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18767 states. [2023-11-23 21:17:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18767 to 18675. [2023-11-23 21:17:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18675 states, 12695 states have (on average 1.387239070500197) internal successors, (17611), 12854 states have internal predecessors, (17611), 4271 states have call successors, (4271), 1743 states have call predecessors, (4271), 1708 states have return successors, (4234), 4197 states have call predecessors, (4234), 4234 states have call successors, (4234) [2023-11-23 21:17:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18675 states to 18675 states and 26116 transitions. [2023-11-23 21:17:32,224 INFO L78 Accepts]: Start accepts. Automaton has 18675 states and 26116 transitions. Word has length 339 [2023-11-23 21:17:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:32,225 INFO L495 AbstractCegarLoop]: Abstraction has 18675 states and 26116 transitions. [2023-11-23 21:17:32,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-11-23 21:17:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 18675 states and 26116 transitions. [2023-11-23 21:17:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-23 21:17:32,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:32,296 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 16, 16, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:32,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:17:32,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:32,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1575023977, now seen corresponding path program 1 times [2023-11-23 21:17:32,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508843166] [2023-11-23 21:17:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1923 trivial. 0 not checked. [2023-11-23 21:17:36,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:36,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508843166] [2023-11-23 21:17:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508843166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:36,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:36,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:17:36,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155331483] [2023-11-23 21:17:36,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:17:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:36,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:17:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:17:36,219 INFO L87 Difference]: Start difference. First operand 18675 states and 26116 transitions. Second operand has 7 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (45), 3 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-23 21:17:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:38,918 INFO L93 Difference]: Finished difference Result 37557 states and 52671 transitions. [2023-11-23 21:17:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:17:38,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (45), 3 states have call predecessors, (45), 1 states have call successors, (45) Word has length 409 [2023-11-23 21:17:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:39,008 INFO L225 Difference]: With dead ends: 37557 [2023-11-23 21:17:39,009 INFO L226 Difference]: Without dead ends: 18931 [2023-11-23 21:17:39,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:17:39,064 INFO L413 NwaCegarLoop]: 869 mSDtfsCounter, 0 mSDsluCounter, 4337 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5206 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:39,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5206 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:17:39,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18931 states. [2023-11-23 21:17:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18931 to 18915. [2023-11-23 21:17:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18915 states, 12855 states have (on average 1.3824192921042395) internal successors, (17771), 13014 states have internal predecessors, (17771), 4271 states have call successors, (4271), 1743 states have call predecessors, (4271), 1788 states have return successors, (4434), 4277 states have call predecessors, (4434), 4234 states have call successors, (4434) [2023-11-23 21:17:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18915 states to 18915 states and 26476 transitions. [2023-11-23 21:17:40,392 INFO L78 Accepts]: Start accepts. Automaton has 18915 states and 26476 transitions. Word has length 409 [2023-11-23 21:17:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:40,393 INFO L495 AbstractCegarLoop]: Abstraction has 18915 states and 26476 transitions. [2023-11-23 21:17:40,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (45), 3 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-23 21:17:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 18915 states and 26476 transitions. [2023-11-23 21:17:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-11-23 21:17:40,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:40,483 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 16, 16, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:40,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:17:40,484 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:40,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1974772186, now seen corresponding path program 1 times [2023-11-23 21:17:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:40,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054188956] [2023-11-23 21:17:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:40,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2023-11-23 21:17:41,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:41,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054188956] [2023-11-23 21:17:41,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054188956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:41,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:41,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:41,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847171057] [2023-11-23 21:17:41,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:41,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:41,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:41,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:41,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:41,775 INFO L87 Difference]: Start difference. First operand 18915 states and 26476 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46)