./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/expand-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/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_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/expand-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash aa9575a9d6782b3f681109b33c8859a1aefcf9cb32eb5af53f59cc43db765f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:30:12,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:30:12,371 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-23 21:30:12,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:30:12,379 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:30:12,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:30:12,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:30:12,421 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:30:12,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:30:12,430 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:30:12,430 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:30:12,431 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:30:12,431 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:30:12,433 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:30:12,434 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:30:12,434 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:30:12,435 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:30:12,435 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:30:12,436 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:30:12,436 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:30:12,438 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:30:12,439 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:30:12,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:30:12,441 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:30:12,441 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:30:12,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:30:12,442 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:30:12,442 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:30:12,443 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:30:12,443 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:30:12,445 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:30:12,445 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:30:12,445 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:30:12,445 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:30:12,446 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:30:12,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:30:12,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:12,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:30:12,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:30:12,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:30:12,447 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:30:12,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:30:12,448 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:30:12,448 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:30:12,449 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:30:12,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:30:12,449 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_f1e354fc-78c0-4502-8870-bf51ef52ab86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa9575a9d6782b3f681109b33c8859a1aefcf9cb32eb5af53f59cc43db765f1e [2023-11-23 21:30:12,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:30:12,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:30:12,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:30:12,798 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:30:12,798 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:30:12,800 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/busybox-1.22.0/expand-2.i [2023-11-23 21:30:15,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:30:16,511 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:30:16,512 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/sv-benchmarks/c/busybox-1.22.0/expand-2.i [2023-11-23 21:30:16,555 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/data/bc123ec75/14ec9a819964495e8af9212d99687825/FLAG2f67925e1 [2023-11-23 21:30:16,574 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/data/bc123ec75/14ec9a819964495e8af9212d99687825 [2023-11-23 21:30:16,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:30:16,582 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:30:16,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:16,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:30:16,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:30:16,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:16,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3d7fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:16, skipping insertion in model container [2023-11-23 21:30:16,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:16" (1/1) ... [2023-11-23 21:30:16,714 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:30:18,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:18,740 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:30:19,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:19,246 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,247 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,247 WARN L675 CHandler]: The function ferror is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,247 WARN L675 CHandler]: The function fopen is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,247 WARN L675 CHandler]: The function clearerr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,247 WARN L675 CHandler]: The function strstr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,247 WARN L675 CHandler]: The function fclose is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,248 WARN L675 CHandler]: The function putchar is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,248 WARN L675 CHandler]: The function strtoul is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,248 WARN L675 CHandler]: The function fputs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,248 WARN L675 CHandler]: The function strcspn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,248 WARN L675 CHandler]: The function fgetc is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:19,256 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:30:19,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19 WrapperNode [2023-11-23 21:30:19,257 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:19,258 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:30:19,258 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:30:19,259 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:30:19,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,500 INFO L138 Inliner]: procedures = 591, calls = 644, calls flagged for inlining = 37, calls inlined = 36, statements flattened = 2519 [2023-11-23 21:30:19,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:30:19,501 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:30:19,502 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:30:19,502 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:30:19,513 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,529 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,530 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,687 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:30:19,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:30:19,712 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:30:19,712 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:30:19,713 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (1/1) ... [2023-11-23 21:30:19,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:19,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:19,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:30:19,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:30:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure getopt32 [2023-11-23 21:30:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure getopt32 [2023-11-23 21:30:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2023-11-23 21:30:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2023-11-23 21:30:19,787 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2023-11-23 21:30:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure xrealloc [2023-11-23 21:30:19,787 INFO L138 BoogieDeclarations]: Found implementation of procedure xrealloc [2023-11-23 21:30:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-23 21:30:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2023-11-23 21:30:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:30:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2023-11-23 21:30:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:30:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-23 21:30:19,788 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-23 21:30:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2023-11-23 21:30:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:30:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:30:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:30:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2023-11-23 21:30:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-23 21:30:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:30:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:30:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:30:19,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:30:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-23 21:30:19,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-23 21:30:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-23 21:30:19,791 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-23 21:30:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc [2023-11-23 21:30:19,791 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc [2023-11-23 21:30:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:30:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:30:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure bb_simple_perror_msg [2023-11-23 21:30:19,792 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_simple_perror_msg [2023-11-23 21:30:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure bb_perror_msg_and_die [2023-11-23 21:30:19,792 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_perror_msg_and_die [2023-11-23 21:30:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2023-11-23 21:30:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:30:19,793 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:30:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:30:19,793 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:30:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:30:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:30:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2023-11-23 21:30:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:30:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2023-11-23 21:30:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure xatou_range [2023-11-23 21:30:19,794 INFO L138 BoogieDeclarations]: Found implementation of procedure xatou_range [2023-11-23 21:30:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure unicode_strwidth [2023-11-23 21:30:19,794 INFO L138 BoogieDeclarations]: Found implementation of procedure unicode_strwidth [2023-11-23 21:30:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:30:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc_fgets [2023-11-23 21:30:19,795 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc_fgets [2023-11-23 21:30:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2023-11-23 21:30:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-11-23 21:30:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-23 21:30:19,796 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-23 21:30:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:30:20,325 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:30:20,336 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:30:22,608 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:30:23,523 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:30:23,524 INFO L309 CfgBuilder]: Removed 45 assume(true) statements. [2023-11-23 21:30:23,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:30:23 BoogieIcfgContainer [2023-11-23 21:30:23,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:30:23,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:30:23,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:30:23,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:30:23,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:30:16" (1/3) ... [2023-11-23 21:30:23,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3480e924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:30:23, skipping insertion in model container [2023-11-23 21:30:23,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:19" (2/3) ... [2023-11-23 21:30:23,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3480e924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:30:23, skipping insertion in model container [2023-11-23 21:30:23,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:30:23" (3/3) ... [2023-11-23 21:30:23,536 INFO L112 eAbstractionObserver]: Analyzing ICFG expand-2.i [2023-11-23 21:30:23,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:30:23,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2023-11-23 21:30:23,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:30:23,631 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;@27e0cace, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:30:23,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2023-11-23 21:30:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 568 states, 433 states have (on average 1.672055427251732) internal successors, (724), 512 states have internal predecessors, (724), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-23 21:30:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:30:23,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:23,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:30:23,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:23,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2538358, now seen corresponding path program 1 times [2023-11-23 21:30:23,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:23,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875816438] [2023-11-23 21:30:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:23,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:24,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:24,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875816438] [2023-11-23 21:30:24,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875816438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:24,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:24,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:30:24,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19176619] [2023-11-23 21:30:24,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:24,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:24,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:24,322 INFO L87 Difference]: Start difference. First operand has 568 states, 433 states have (on average 1.672055427251732) internal successors, (724), 512 states have internal predecessors, (724), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:24,904 INFO L93 Difference]: Finished difference Result 1126 states and 1647 transitions. [2023-11-23 21:30:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-23 21:30:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:24,923 INFO L225 Difference]: With dead ends: 1126 [2023-11-23 21:30:24,923 INFO L226 Difference]: Without dead ends: 554 [2023-11-23 21:30:24,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 21:30:24,939 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:24,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1302 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:30:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-11-23 21:30:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2023-11-23 21:30:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 425 states have (on average 1.5670588235294118) internal successors, (666), 507 states have internal predecessors, (666), 41 states have call successors, (41), 14 states have call predecessors, (41), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 740 transitions. [2023-11-23 21:30:25,034 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 740 transitions. Word has length 3 [2023-11-23 21:30:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:25,035 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 740 transitions. [2023-11-23 21:30:25,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 740 transitions. [2023-11-23 21:30:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:30:25,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:25,036 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-23 21:30:25,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:30:25,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:25,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:25,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1687323453, now seen corresponding path program 1 times [2023-11-23 21:30:25,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:25,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479862452] [2023-11-23 21:30:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:25,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:25,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479862452] [2023-11-23 21:30:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479862452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:25,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765502469] [2023-11-23 21:30:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:25,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:25,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:25,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:30:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:25,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:30:25,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:25,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765502469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:25,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:25,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-23 21:30:25,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137296870] [2023-11-23 21:30:25,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:25,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:25,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:25,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:25,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:25,867 INFO L87 Difference]: Start difference. First operand 554 states and 740 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:26,365 INFO L93 Difference]: Finished difference Result 554 states and 740 transitions. [2023-11-23 21:30:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:30:26,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 21:30:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:26,371 INFO L225 Difference]: With dead ends: 554 [2023-11-23 21:30:26,371 INFO L226 Difference]: Without dead ends: 553 [2023-11-23 21:30:26,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:26,373 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 2 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:26,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1920 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:30:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-11-23 21:30:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2023-11-23 21:30:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 425 states have (on average 1.5647058823529412) internal successors, (665), 506 states have internal predecessors, (665), 41 states have call successors, (41), 14 states have call predecessors, (41), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 739 transitions. [2023-11-23 21:30:26,409 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 739 transitions. Word has length 6 [2023-11-23 21:30:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:26,410 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 739 transitions. [2023-11-23 21:30:26,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 739 transitions. [2023-11-23 21:30:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:30:26,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:26,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-23 21:30:26,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:26,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:26,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:26,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:26,634 INFO L85 PathProgramCache]: Analyzing trace with hash -767417613, now seen corresponding path program 1 times [2023-11-23 21:30:26,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:26,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397124338] [2023-11-23 21:30:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:26,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:26,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:26,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397124338] [2023-11-23 21:30:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397124338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:26,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:26,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:30:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912886348] [2023-11-23 21:30:26,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:26,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:26,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:26,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:26,790 INFO L87 Difference]: Start difference. First operand 553 states and 739 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:27,231 INFO L93 Difference]: Finished difference Result 553 states and 739 transitions. [2023-11-23 21:30:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:30:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:27,237 INFO L225 Difference]: With dead ends: 553 [2023-11-23 21:30:27,237 INFO L226 Difference]: Without dead ends: 552 [2023-11-23 21:30:27,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:30:27,239 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 0 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:27,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1280 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-11-23 21:30:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2023-11-23 21:30:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 423 states have (on average 1.5650118203309693) internal successors, (662), 503 states have internal predecessors, (662), 41 states have call successors, (41), 14 states have call predecessors, (41), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 736 transitions. [2023-11-23 21:30:27,278 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 736 transitions. Word has length 7 [2023-11-23 21:30:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:27,278 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 736 transitions. [2023-11-23 21:30:27,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 736 transitions. [2023-11-23 21:30:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:30:27,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:27,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:27,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:30:27,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:27,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2008290794, now seen corresponding path program 1 times [2023-11-23 21:30:27,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:27,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147085736] [2023-11-23 21:30:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:27,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:27,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147085736] [2023-11-23 21:30:27,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147085736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:27,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055285040] [2023-11-23 21:30:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:27,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:27,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:27,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:27,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:30:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:27,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:30:27,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:28,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055285040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:28,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:28,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:30:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382773583] [2023-11-23 21:30:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:28,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:28,014 INFO L87 Difference]: Start difference. First operand 550 states and 736 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:28,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:28,412 INFO L93 Difference]: Finished difference Result 550 states and 736 transitions. [2023-11-23 21:30:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-23 21:30:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:28,418 INFO L225 Difference]: With dead ends: 550 [2023-11-23 21:30:28,418 INFO L226 Difference]: Without dead ends: 548 [2023-11-23 21:30:28,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:28,423 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 107 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:28,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1167 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-23 21:30:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2023-11-23 21:30:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 423 states have (on average 1.5602836879432624) internal successors, (660), 501 states have internal predecessors, (660), 41 states have call successors, (41), 14 states have call predecessors, (41), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 734 transitions. [2023-11-23 21:30:28,458 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 734 transitions. Word has length 9 [2023-11-23 21:30:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:28,460 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 734 transitions. [2023-11-23 21:30:28,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 734 transitions. [2023-11-23 21:30:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:30:28,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:28,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:28,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:28,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:28,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:28,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2127474357, now seen corresponding path program 1 times [2023-11-23 21:30:28,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:28,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107140344] [2023-11-23 21:30:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:28,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:28,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:28,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107140344] [2023-11-23 21:30:28,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107140344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:28,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874629938] [2023-11-23 21:30:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:28,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:28,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:28,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:28,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:30:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:29,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:30:29,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:29,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874629938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878950193] [2023-11-23 21:30:29,386 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:30:29,387 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:29,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:29,396 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:29,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:45,995 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 138 for LOIs [2023-11-23 21:30:46,047 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:48,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1878950193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:48,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:30:48,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 3, 4] total 13 [2023-11-23 21:30:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582714185] [2023-11-23 21:30:48,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:48,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:30:48,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:30:48,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:30:48,109 INFO L87 Difference]: Start difference. First operand 548 states and 734 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:54,320 INFO L93 Difference]: Finished difference Result 550 states and 735 transitions. [2023-11-23 21:30:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:30:54,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-23 21:30:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:54,326 INFO L225 Difference]: With dead ends: 550 [2023-11-23 21:30:54,326 INFO L226 Difference]: Without dead ends: 548 [2023-11-23 21:30:54,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:30:54,328 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 4 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:54,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3105 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-11-23 21:30:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-23 21:30:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2023-11-23 21:30:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 424 states have (on average 1.554245283018868) internal successors, (659), 500 states have internal predecessors, (659), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 733 transitions. [2023-11-23 21:30:54,356 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 733 transitions. Word has length 10 [2023-11-23 21:30:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:54,356 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 733 transitions. [2023-11-23 21:30:54,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 733 transitions. [2023-11-23 21:30:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:30:54,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:54,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:54,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:54,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:54,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:54,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 494864919, now seen corresponding path program 1 times [2023-11-23 21:30:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195114747] [2023-11-23 21:30:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:54,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:54,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:54,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195114747] [2023-11-23 21:30:54,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195114747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:54,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127955733] [2023-11-23 21:30:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:54,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:54,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:54,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:54,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:30:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:55,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:30:55,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:55,242 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:55,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127955733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:55,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:55,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:30:55,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680568459] [2023-11-23 21:30:55,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:55,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:55,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:55,245 INFO L87 Difference]: Start difference. First operand 548 states and 733 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:55,636 INFO L93 Difference]: Finished difference Result 548 states and 733 transitions. [2023-11-23 21:30:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:55,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-23 21:30:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:55,641 INFO L225 Difference]: With dead ends: 548 [2023-11-23 21:30:55,641 INFO L226 Difference]: Without dead ends: 547 [2023-11-23 21:30:55,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:55,642 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 2 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:55,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1267 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-23 21:30:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2023-11-23 21:30:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 424 states have (on average 1.5518867924528301) internal successors, (658), 499 states have internal predecessors, (658), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 732 transitions. [2023-11-23 21:30:55,669 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 732 transitions. Word has length 15 [2023-11-23 21:30:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:55,669 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 732 transitions. [2023-11-23 21:30:55,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 732 transitions. [2023-11-23 21:30:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:30:55,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:55,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:55,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:55,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:55,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:55,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:55,896 INFO L85 PathProgramCache]: Analyzing trace with hash 494887775, now seen corresponding path program 1 times [2023-11-23 21:30:55,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:55,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467311003] [2023-11-23 21:30:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:55,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:56,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:56,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467311003] [2023-11-23 21:30:56,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467311003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:56,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604518301] [2023-11-23 21:30:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:56,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:56,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:56,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:56,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:30:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:56,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:30:56,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:56,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:56,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604518301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:56,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:56,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:30:56,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487951676] [2023-11-23 21:30:56,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:56,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:56,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:56,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:56,503 INFO L87 Difference]: Start difference. First operand 547 states and 732 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:56,913 INFO L93 Difference]: Finished difference Result 547 states and 732 transitions. [2023-11-23 21:30:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-23 21:30:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:56,918 INFO L225 Difference]: With dead ends: 547 [2023-11-23 21:30:56,918 INFO L226 Difference]: Without dead ends: 546 [2023-11-23 21:30:56,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:56,919 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 6 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:56,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1260 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-11-23 21:30:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2023-11-23 21:30:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 424 states have (on average 1.5495283018867925) internal successors, (657), 498 states have internal predecessors, (657), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 731 transitions. [2023-11-23 21:30:56,946 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 731 transitions. Word has length 15 [2023-11-23 21:30:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:56,946 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 731 transitions. [2023-11-23 21:30:56,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 731 transitions. [2023-11-23 21:30:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:30:56,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:56,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:56,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:57,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:30:57,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:57,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:57,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1839054783, now seen corresponding path program 1 times [2023-11-23 21:30:57,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:57,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598679508] [2023-11-23 21:30:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:57,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:57,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598679508] [2023-11-23 21:30:57,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598679508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:57,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927492646] [2023-11-23 21:30:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:57,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:57,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:57,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:57,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:30:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:57,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:30:57,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:57,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:57,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927492646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:57,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:57,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:30:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148419005] [2023-11-23 21:30:57,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:57,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:57,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:57,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:57,793 INFO L87 Difference]: Start difference. First operand 546 states and 731 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:58,188 INFO L93 Difference]: Finished difference Result 1083 states and 1454 transitions. [2023-11-23 21:30:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:58,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-23 21:30:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:58,194 INFO L225 Difference]: With dead ends: 1083 [2023-11-23 21:30:58,195 INFO L226 Difference]: Without dead ends: 549 [2023-11-23 21:30:58,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:58,198 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 0 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:58,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1266 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-11-23 21:30:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2023-11-23 21:30:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 427 states have (on average 1.5456674473067915) internal successors, (660), 501 states have internal predecessors, (660), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 734 transitions. [2023-11-23 21:30:58,226 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 734 transitions. Word has length 16 [2023-11-23 21:30:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:58,226 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 734 transitions. [2023-11-23 21:30:58,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 734 transitions. [2023-11-23 21:30:58,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:30:58,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:58,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:58,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:58,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:30:58,446 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting getopt32Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:58,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash -797241480, now seen corresponding path program 1 times [2023-11-23 21:30:58,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:58,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028735256] [2023-11-23 21:30:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:58,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:58,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028735256] [2023-11-23 21:30:58,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028735256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:58,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754627548] [2023-11-23 21:30:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:58,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:58,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:58,672 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:58,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:30:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:59,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:30:59,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:59,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:59,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754627548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:59,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:59,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:30:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329927697] [2023-11-23 21:30:59,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:59,158 INFO L87 Difference]: Start difference. First operand 549 states and 734 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:59,551 INFO L93 Difference]: Finished difference Result 552 states and 738 transitions. [2023-11-23 21:30:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-23 21:30:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:59,557 INFO L225 Difference]: With dead ends: 552 [2023-11-23 21:30:59,557 INFO L226 Difference]: Without dead ends: 551 [2023-11-23 21:30:59,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:59,559 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 227 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:59,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1056 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-23 21:30:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 548. [2023-11-23 21:30:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 427 states have (on average 1.5433255269320842) internal successors, (659), 500 states have internal predecessors, (659), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:30:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 733 transitions. [2023-11-23 21:30:59,586 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 733 transitions. Word has length 19 [2023-11-23 21:30:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:59,586 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 733 transitions. [2023-11-23 21:30:59,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:30:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 733 transitions. [2023-11-23 21:30:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:30:59,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:59,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:59,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:59,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:59,812 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting getopt32Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:30:59,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:59,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1055318499, now seen corresponding path program 1 times [2023-11-23 21:30:59,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:59,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886877071] [2023-11-23 21:30:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:00,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:00,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886877071] [2023-11-23 21:31:00,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886877071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:00,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476686929] [2023-11-23 21:31:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:00,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:00,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:00,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:31:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:00,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:31:00,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:31:00,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:00,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476686929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:00,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:00,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:31:00,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559818036] [2023-11-23 21:31:00,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:00,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:00,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:00,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:00,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:00,538 INFO L87 Difference]: Start difference. First operand 548 states and 733 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:31:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:00,994 INFO L93 Difference]: Finished difference Result 727 states and 983 transitions. [2023-11-23 21:31:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:00,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-23 21:31:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:00,999 INFO L225 Difference]: With dead ends: 727 [2023-11-23 21:31:01,000 INFO L226 Difference]: Without dead ends: 726 [2023-11-23 21:31:01,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:01,001 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 225 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:01,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1252 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:31:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-23 21:31:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 552. [2023-11-23 21:31:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 431 states have (on average 1.5406032482598608) internal successors, (664), 504 states have internal predecessors, (664), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:31:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 738 transitions. [2023-11-23 21:31:01,030 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 738 transitions. Word has length 20 [2023-11-23 21:31:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:01,031 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 738 transitions. [2023-11-23 21:31:01,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:31:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 738 transitions. [2023-11-23 21:31:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:31:01,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:01,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:01,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:01,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:01,247 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:31:01,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash -676318828, now seen corresponding path program 1 times [2023-11-23 21:31:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:01,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639706936] [2023-11-23 21:31:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:31:01,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:01,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639706936] [2023-11-23 21:31:01,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639706936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:01,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539394694] [2023-11-23 21:31:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:01,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:01,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:01,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:31:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:01,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:31:01,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:01,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539394694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:01,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:31:01,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526077706] [2023-11-23 21:31:01,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:01,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:01,912 INFO L87 Difference]: Start difference. First operand 552 states and 738 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:31:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:02,319 INFO L93 Difference]: Finished difference Result 552 states and 738 transitions. [2023-11-23 21:31:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-23 21:31:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:02,323 INFO L225 Difference]: With dead ends: 552 [2023-11-23 21:31:02,324 INFO L226 Difference]: Without dead ends: 551 [2023-11-23 21:31:02,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:02,325 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 0 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:02,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1263 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:31:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-23 21:31:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 549. [2023-11-23 21:31:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 429 states have (on average 1.5407925407925407) internal successors, (661), 501 states have internal predecessors, (661), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:31:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 735 transitions. [2023-11-23 21:31:02,352 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 735 transitions. Word has length 19 [2023-11-23 21:31:02,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:02,353 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 735 transitions. [2023-11-23 21:31:02,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:31:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 735 transitions. [2023-11-23 21:31:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:31:02,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:02,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:02,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:02,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:02,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:31:02,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash -675610283, now seen corresponding path program 1 times [2023-11-23 21:31:02,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:02,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465347104] [2023-11-23 21:31:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:02,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:31:02,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465347104] [2023-11-23 21:31:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465347104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231014640] [2023-11-23 21:31:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:02,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:02,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:02,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:02,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:31:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:03,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:31:03,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:03,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:03,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231014640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:03,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:03,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:31:03,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006069864] [2023-11-23 21:31:03,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:03,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:03,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:03,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:03,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:03,267 INFO L87 Difference]: Start difference. First operand 549 states and 735 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:31:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:03,672 INFO L93 Difference]: Finished difference Result 557 states and 745 transitions. [2023-11-23 21:31:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:03,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-23 21:31:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:03,677 INFO L225 Difference]: With dead ends: 557 [2023-11-23 21:31:03,677 INFO L226 Difference]: Without dead ends: 556 [2023-11-23 21:31:03,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:03,678 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 0 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:03,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1260 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:31:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-23 21:31:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2023-11-23 21:31:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 436 states have (on average 1.536697247706422) internal successors, (670), 508 states have internal predecessors, (670), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:31:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 744 transitions. [2023-11-23 21:31:03,704 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 744 transitions. Word has length 19 [2023-11-23 21:31:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:03,704 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 744 transitions. [2023-11-23 21:31:03,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:31:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 744 transitions. [2023-11-23 21:31:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:31:03,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:03,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:03,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:03,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:31:03,919 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting getopt32Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-23 21:31:03,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash -870066070, now seen corresponding path program 1 times [2023-11-23 21:31:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:03,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863107284] [2023-11-23 21:31:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:31:04,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863107284] [2023-11-23 21:31:04,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863107284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639173540] [2023-11-23 21:31:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:04,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:04,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:04,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e354fc-78c0-4502-8870-bf51ef52ab86/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:31:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:04,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:31:04,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:31:04,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:31:04,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639173540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:04,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588866742] [2023-11-23 21:31:04,697 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-23 21:31:04,698 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:04,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:04,698 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:04,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs