./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:34:23,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:34:23,460 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 06:34:23,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:34:23,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:34:23,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:34:23,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:34:23,517 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:34:23,518 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:34:23,519 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:34:23,520 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:34:23,520 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:34:23,521 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:34:23,521 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:34:23,523 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:34:23,524 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:34:23,524 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:34:23,524 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:34:23,525 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:34:23,525 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:34:23,525 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:34:23,526 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:34:23,530 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 06:34:23,531 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 06:34:23,531 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:34:23,532 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:34:23,532 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:34:23,532 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:34:23,532 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:34:23,533 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 06:34:23,533 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 06:34:23,533 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 06:34:23,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:34:23,534 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 06:34:23,534 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:34:23,534 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 06:34:23,535 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:34:23,535 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:34:23,537 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:34:23,538 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:34:23,538 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:34:23,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:34:23,539 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:34:23,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:34:23,540 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:34:23,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:34:23,540 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:34:23,541 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:34:23,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:34:23,541 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_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 [2024-11-09 06:34:23,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:34:23,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:34:23,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:34:23,907 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:34:23,907 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:34:23,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i Unable to find full path for "g++" [2024-11-09 06:34:26,026 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:34:26,358 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:34:26,359 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2024-11-09 06:34:26,380 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/data/56d796134/0b6de8db45e242c2a2b5631b89e61b87/FLAGd599d44c0 [2024-11-09 06:34:26,397 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/data/56d796134/0b6de8db45e242c2a2b5631b89e61b87 [2024-11-09 06:34:26,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:34:26,402 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:34:26,404 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:34:26,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:34:26,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:34:26,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:34:26" (1/1) ... [2024-11-09 06:34:26,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700a25c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:26, skipping insertion in model container [2024-11-09 06:34:26,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:34:26" (1/1) ... [2024-11-09 06:34:26,455 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:34:26,894 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 06:34:26,896 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 06:34:26,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:34:26,930 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:34:27,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:34:27,042 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:34:27,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27 WrapperNode [2024-11-09 06:34:27,042 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:34:27,044 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:34:27,044 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:34:27,044 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:34:27,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,077 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,111 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2024-11-09 06:34:27,112 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:34:27,113 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:34:27,113 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:34:27,114 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:34:27,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,133 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,148 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,166 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:34:27,171 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:34:27,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:34:27,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:34:27,176 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (1/1) ... [2024-11-09 06:34:27,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:34:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:27,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:34:27,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:34:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:34:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:34:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:34:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:34:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:34:27,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:34:27,390 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:34:27,393 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:34:27,798 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-11-09 06:34:27,798 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:34:27,907 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:34:27,907 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:34:27,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:34:27 BoogieIcfgContainer [2024-11-09 06:34:27,908 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:34:27,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:34:27,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:34:27,918 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:34:27,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:34:26" (1/3) ... [2024-11-09 06:34:27,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445f43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:34:27, skipping insertion in model container [2024-11-09 06:34:27,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:34:27" (2/3) ... [2024-11-09 06:34:27,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445f43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:34:27, skipping insertion in model container [2024-11-09 06:34:27,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:34:27" (3/3) ... [2024-11-09 06:34:27,923 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2024-11-09 06:34:27,944 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:34:27,945 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-11-09 06:34:28,009 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:34:28,015 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@71d6344e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:34:28,016 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-09 06:34:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 2.217391304347826) internal successors, (51), 42 states have internal predecessors, (51), 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) [2024-11-09 06:34:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:34:28,026 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:28,027 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:34:28,027 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:28,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash 4517470, now seen corresponding path program 1 times [2024-11-09 06:34:28,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:28,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172076767] [2024-11-09 06:34:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:28,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:28,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:28,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172076767] [2024-11-09 06:34:28,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172076767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:28,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:28,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:34:28,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662306252] [2024-11-09 06:34:28,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:28,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:34:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:28,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:34:28,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:34:28,639 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 2.217391304347826) internal successors, (51), 42 states have internal predecessors, (51), 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2024-11-09 06:34:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:28,757 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2024-11-09 06:34:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:34:28,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2024-11-09 06:34:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:28,771 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:34:28,771 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 06:34:28,773 INFO L431 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 [2024-11-09 06:34:28,778 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:28,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 06:34:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 06:34:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 39 states have internal predecessors, (47), 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) [2024-11-09 06:34:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-09 06:34:28,821 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 4 [2024-11-09 06:34:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:28,821 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-09 06:34:28,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2024-11-09 06:34:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-09 06:34:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:34:28,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:28,824 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:34:28,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:34:28,825 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:28,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:28,826 INFO L85 PathProgramCache]: Analyzing trace with hash 4517471, now seen corresponding path program 1 times [2024-11-09 06:34:28,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:28,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757730160] [2024-11-09 06:34:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:29,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757730160] [2024-11-09 06:34:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757730160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:29,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:34:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486962816] [2024-11-09 06:34:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:29,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:34:29,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:34:29,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:29,340 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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) [2024-11-09 06:34:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:29,479 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-11-09 06:34:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:34:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2024-11-09 06:34:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:29,481 INFO L225 Difference]: With dead ends: 43 [2024-11-09 06:34:29,482 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 06:34:29,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:29,484 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:29,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 06:34:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-09 06:34:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 42 states have internal predecessors, (51), 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) [2024-11-09 06:34:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-09 06:34:29,498 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 4 [2024-11-09 06:34:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:29,499 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-09 06:34:29,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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) [2024-11-09 06:34:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-09 06:34:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:34:29,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:29,500 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:34:29,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:34:29,501 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:29,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash 56729357, now seen corresponding path program 1 times [2024-11-09 06:34:29,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:29,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001301002] [2024-11-09 06:34:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:29,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:29,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:29,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001301002] [2024-11-09 06:34:29,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001301002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:29,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:29,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:34:29,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276003700] [2024-11-09 06:34:29,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:29,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:34:29,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:34:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:34:29,613 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2024-11-09 06:34:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:29,681 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2024-11-09 06:34:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:34:29,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2024-11-09 06:34:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:29,685 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:34:29,686 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 06:34:29,687 INFO L431 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 [2024-11-09 06:34:29,688 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:29,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 06:34:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-09 06:34:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 40 states have internal predecessors, (49), 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) [2024-11-09 06:34:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-11-09 06:34:29,699 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 6 [2024-11-09 06:34:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:29,700 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-11-09 06:34:29,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2024-11-09 06:34:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-11-09 06:34:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:34:29,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:29,701 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:34:29,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:34:29,702 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:29,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash 56729358, now seen corresponding path program 1 times [2024-11-09 06:34:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:29,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598805225] [2024-11-09 06:34:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:29,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:30,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:30,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598805225] [2024-11-09 06:34:30,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598805225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:30,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:30,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:34:30,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176070899] [2024-11-09 06:34:30,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:30,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:34:30,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:34:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:34:30,064 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2024-11-09 06:34:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:30,274 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-11-09 06:34:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:34:30,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 [2024-11-09 06:34:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:30,278 INFO L225 Difference]: With dead ends: 44 [2024-11-09 06:34:30,278 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 06:34:30,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:34:30,283 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:30,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 89 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:34:30,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 06:34:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-09 06:34:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 43 states have internal predecessors, (54), 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) [2024-11-09 06:34:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-11-09 06:34:30,292 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 6 [2024-11-09 06:34:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:30,292 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-11-09 06:34:30,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2024-11-09 06:34:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-11-09 06:34:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:34:30,293 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:30,293 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:34:30,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:34:30,296 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:30,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:30,297 INFO L85 PathProgramCache]: Analyzing trace with hash 56740185, now seen corresponding path program 1 times [2024-11-09 06:34:30,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:30,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145412481] [2024-11-09 06:34:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:30,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:30,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:30,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145412481] [2024-11-09 06:34:30,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145412481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:30,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:30,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:34:30,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830238644] [2024-11-09 06:34:30,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:30,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:34:30,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:30,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:34:30,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:34:30,561 INFO L87 Difference]: Start difference. First operand 44 states and 54 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) [2024-11-09 06:34:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:30,698 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2024-11-09 06:34:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:34:30,699 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 [2024-11-09 06:34:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:30,700 INFO L225 Difference]: With dead ends: 43 [2024-11-09 06:34:30,700 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 06:34:30,700 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:30,702 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:30,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 06:34:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-09 06:34:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 42 states have internal predecessors, (53), 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) [2024-11-09 06:34:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2024-11-09 06:34:30,710 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 6 [2024-11-09 06:34:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:30,710 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2024-11-09 06:34:30,710 INFO L472 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) [2024-11-09 06:34:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2024-11-09 06:34:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:34:30,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:30,711 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-09 06:34:30,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:34:30,712 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:30,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1438454277, now seen corresponding path program 1 times [2024-11-09 06:34:30,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:30,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186365378] [2024-11-09 06:34:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:31,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:31,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186365378] [2024-11-09 06:34:31,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186365378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:31,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006192126] [2024-11-09 06:34:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:31,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:31,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:31,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:31,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:34:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:31,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 06:34:31,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:31,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:34:31,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-09 06:34:31,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 06:34:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:31,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:34:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006192126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:34:31,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150813334] [2024-11-09 06:34:31,942 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-09 06:34:31,942 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:34:31,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:34:31,953 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:34:31,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:34:33,103 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:34:33,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '541#(exists ((|v_ULTIMATE.start_main_~i~0#1_35| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.base_29| Int)) (and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~nondetString1~0#1.offset_27| 0) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~0#1_35|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) |v_ULTIMATE.start_main_~i~0#1_35|) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 2 |ULTIMATE.start_main_~length1~0#1|)))' at error location [2024-11-09 06:34:33,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:34:33,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:34:33,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 06:34:33,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998553900] [2024-11-09 06:34:33,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:34:33,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 06:34:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 06:34:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:34:33,497 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2024-11-09 06:34:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:33,833 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2024-11-09 06:34:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:34:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 [2024-11-09 06:34:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:33,835 INFO L225 Difference]: With dead ends: 45 [2024-11-09 06:34:33,835 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 06:34:33,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-09 06:34:33,836 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:33,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 137 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:34:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 06:34:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2024-11-09 06:34:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 38 states have internal predecessors, (47), 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) [2024-11-09 06:34:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2024-11-09 06:34:33,856 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 7 [2024-11-09 06:34:33,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:33,856 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2024-11-09 06:34:33,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2024-11-09 06:34:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2024-11-09 06:34:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:34:33,857 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:33,857 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:33,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:34:34,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 06:34:34,058 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:34,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1758945728, now seen corresponding path program 1 times [2024-11-09 06:34:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:34,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740535681] [2024-11-09 06:34:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:34,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:34,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:34,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740535681] [2024-11-09 06:34:34,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740535681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:34,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:34,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:34:34,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200623880] [2024-11-09 06:34:34,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:34,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:34:34,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:34,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:34:34,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:34,286 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2024-11-09 06:34:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:34,361 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-11-09 06:34:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:34:34,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2024-11-09 06:34:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:34,363 INFO L225 Difference]: With dead ends: 38 [2024-11-09 06:34:34,363 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 06:34:34,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:34,365 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:34,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 06:34:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-09 06:34:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 37 states have internal predecessors, (46), 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) [2024-11-09 06:34:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2024-11-09 06:34:34,374 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 7 [2024-11-09 06:34:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:34,374 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2024-11-09 06:34:34,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2024-11-09 06:34:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2024-11-09 06:34:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:34:34,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:34,377 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-09 06:34:34,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:34:34,377 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:34,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2104307922, now seen corresponding path program 1 times [2024-11-09 06:34:34,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:34,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239480282] [2024-11-09 06:34:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:34,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:34,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:34,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239480282] [2024-11-09 06:34:34,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239480282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:34,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406194507] [2024-11-09 06:34:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:34,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:34,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:34,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:34,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:34:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:34,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 06:34:34,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:34,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-09 06:34:34,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 06:34:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:35,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:34:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406194507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:34:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176127159] [2024-11-09 06:34:35,333 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-09 06:34:35,335 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:34:35,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:34:35,336 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:34:35,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:34:35,941 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:34:36,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '783#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet17#1|)) (<= |ULTIMATE.start_main_#t~nondet17#1| 127) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int) (|v_ULTIMATE.start_main_~i~1#1_33| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~1#1_33|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_33|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (<= 2 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= (+ |v_ULTIMATE.start_main_~i~1#1_33| 2) |ULTIMATE.start_main_~length2~0#1|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647))))' at error location [2024-11-09 06:34:36,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:34:36,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:34:36,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-09 06:34:36,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036192730] [2024-11-09 06:34:36,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:34:36,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:34:36,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:34:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-09 06:34:36,837 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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) [2024-11-09 06:34:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:37,124 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-11-09 06:34:37,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:34:37,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 9 [2024-11-09 06:34:37,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:37,126 INFO L225 Difference]: With dead ends: 38 [2024-11-09 06:34:37,126 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 06:34:37,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:34:37,127 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:37,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 117 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:34:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 06:34:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-09 06:34:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.72) internal successors, (43), 35 states have internal predecessors, (43), 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) [2024-11-09 06:34:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-09 06:34:37,132 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2024-11-09 06:34:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:37,132 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-09 06:34:37,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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) [2024-11-09 06:34:37,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-09 06:34:37,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:34:37,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:37,133 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:37,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:34:37,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:37,334 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:37,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:37,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1870215204, now seen corresponding path program 1 times [2024-11-09 06:34:37,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:37,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670362745] [2024-11-09 06:34:37,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:37,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:37,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:37,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670362745] [2024-11-09 06:34:37,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670362745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:37,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:37,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:34:37,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788617029] [2024-11-09 06:34:37,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:37,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:34:37,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:37,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:34:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:34:37,390 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-09 06:34:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:37,445 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-11-09 06:34:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:34:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2024-11-09 06:34:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:37,446 INFO L225 Difference]: With dead ends: 35 [2024-11-09 06:34:37,446 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 06:34:37,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:34:37,447 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:37,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:37,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 06:34:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2024-11-09 06:34:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.64) internal successors, (41), 33 states have internal predecessors, (41), 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) [2024-11-09 06:34:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-09 06:34:37,452 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 9 [2024-11-09 06:34:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:37,453 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-09 06:34:37,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-09 06:34:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-09 06:34:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:34:37,454 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:37,454 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:37,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 06:34:37,454 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:37,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1870215203, now seen corresponding path program 1 times [2024-11-09 06:34:37,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:37,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66267589] [2024-11-09 06:34:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:37,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:37,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:37,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66267589] [2024-11-09 06:34:37,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66267589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:37,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:37,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:34:37,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546450680] [2024-11-09 06:34:37,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:37,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:34:37,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:37,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:34:37,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:37,559 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-09 06:34:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:37,621 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2024-11-09 06:34:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:34:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2024-11-09 06:34:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:37,623 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:34:37,623 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 06:34:37,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:37,624 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:37,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 77 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 06:34:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-11-09 06:34:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 37 states have internal predecessors, (48), 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) [2024-11-09 06:34:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2024-11-09 06:34:37,629 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 9 [2024-11-09 06:34:37,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:37,630 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2024-11-09 06:34:37,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-09 06:34:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2024-11-09 06:34:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 06:34:37,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:37,631 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:37,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 06:34:37,631 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:37,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:37,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2142097146, now seen corresponding path program 1 times [2024-11-09 06:34:37,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:37,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858764532] [2024-11-09 06:34:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:37,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:37,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:37,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858764532] [2024-11-09 06:34:37,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858764532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:37,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:37,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:34:37,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544462557] [2024-11-09 06:34:37,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:37,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:34:37,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:37,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:34:37,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:34:37,802 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-11-09 06:34:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:37,847 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2024-11-09 06:34:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:34:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2024-11-09 06:34:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:37,848 INFO L225 Difference]: With dead ends: 37 [2024-11-09 06:34:37,849 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 06:34:37,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:34:37,850 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:37,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 46 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:34:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 06:34:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-09 06:34:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 33 states have internal predecessors, (41), 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) [2024-11-09 06:34:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-09 06:34:37,857 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 10 [2024-11-09 06:34:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:37,858 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-09 06:34:37,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-11-09 06:34:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-09 06:34:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 06:34:37,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:37,859 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:37,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:34:37,859 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:37,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2142095011, now seen corresponding path program 1 times [2024-11-09 06:34:37,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:37,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671601102] [2024-11-09 06:34:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:37,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:37,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:37,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671601102] [2024-11-09 06:34:37,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671601102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:37,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:37,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:34:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714686127] [2024-11-09 06:34:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:37,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:34:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:37,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:34:37,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:34:37,918 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-09 06:34:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:37,960 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2024-11-09 06:34:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:34:37,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2024-11-09 06:34:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:37,961 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:34:37,961 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:34:37,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:37,962 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:37,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:34:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:34:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 06:34:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.5) internal successors, (39), 32 states have internal predecessors, (39), 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) [2024-11-09 06:34:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-09 06:34:37,966 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 10 [2024-11-09 06:34:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:37,966 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-09 06:34:37,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-09 06:34:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-09 06:34:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 06:34:37,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:37,967 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:37,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 06:34:37,967 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:37,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2142095010, now seen corresponding path program 1 times [2024-11-09 06:34:37,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:37,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690753615] [2024-11-09 06:34:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:37,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:38,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:38,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690753615] [2024-11-09 06:34:38,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690753615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:38,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:38,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:34:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866962132] [2024-11-09 06:34:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:38,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:34:38,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:34:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:38,126 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-09 06:34:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:38,178 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-09 06:34:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:34:38,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2024-11-09 06:34:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:38,180 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:34:38,180 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:34:38,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:38,181 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:38,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:34:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:34:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 06:34:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 32 states have internal predecessors, (38), 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) [2024-11-09 06:34:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-11-09 06:34:38,185 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 10 [2024-11-09 06:34:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:38,185 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-11-09 06:34:38,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-09 06:34:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-11-09 06:34:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 06:34:38,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:38,186 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:38,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 06:34:38,186 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:38,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1263969058, now seen corresponding path program 1 times [2024-11-09 06:34:38,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:38,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942032238] [2024-11-09 06:34:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:38,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:38,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:38,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942032238] [2024-11-09 06:34:38,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942032238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:38,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:38,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:34:38,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092077188] [2024-11-09 06:34:38,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:38,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:34:38,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:34:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:34:38,308 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-09 06:34:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:38,368 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-11-09 06:34:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:34:38,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2024-11-09 06:34:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:38,369 INFO L225 Difference]: With dead ends: 32 [2024-11-09 06:34:38,369 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 06:34:38,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:34:38,370 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:38,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 06:34:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 06:34:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 31 states have internal predecessors, (37), 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) [2024-11-09 06:34:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-09 06:34:38,374 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 12 [2024-11-09 06:34:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:38,375 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-09 06:34:38,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-09 06:34:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-09 06:34:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 06:34:38,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:38,376 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:38,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 06:34:38,380 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:38,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1263969057, now seen corresponding path program 1 times [2024-11-09 06:34:38,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:38,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002373164] [2024-11-09 06:34:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:38,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:38,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002373164] [2024-11-09 06:34:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002373164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:38,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:34:38,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194808200] [2024-11-09 06:34:38,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:38,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:34:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:34:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:34:38,505 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-09 06:34:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:38,556 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-09 06:34:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:34:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2024-11-09 06:34:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:38,557 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:34:38,558 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:34:38,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:34:38,560 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:38,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:34:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:34:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 06:34:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 32 states have internal predecessors, (38), 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) [2024-11-09 06:34:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-11-09 06:34:38,565 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 12 [2024-11-09 06:34:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:38,566 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-11-09 06:34:38,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-09 06:34:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-11-09 06:34:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:34:38,567 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:38,567 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:38,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 06:34:38,568 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:38,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash -528343827, now seen corresponding path program 1 times [2024-11-09 06:34:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:38,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415898776] [2024-11-09 06:34:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:38,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:38,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:38,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415898776] [2024-11-09 06:34:38,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415898776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:38,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:38,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:34:38,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365012746] [2024-11-09 06:34:38,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:38,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:34:38,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:34:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:34:38,669 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-11-09 06:34:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:38,700 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-11-09 06:34:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:34:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2024-11-09 06:34:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:38,701 INFO L225 Difference]: With dead ends: 32 [2024-11-09 06:34:38,701 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 06:34:38,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:34:38,703 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:38,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:34:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 06:34:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 06:34:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 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) [2024-11-09 06:34:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-09 06:34:38,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 13 [2024-11-09 06:34:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:38,711 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-09 06:34:38,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-11-09 06:34:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-09 06:34:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:34:38,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:38,712 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:38,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 06:34:38,713 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:38,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash -528343826, now seen corresponding path program 1 times [2024-11-09 06:34:38,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:38,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152947783] [2024-11-09 06:34:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:38,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:38,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152947783] [2024-11-09 06:34:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152947783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:38,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:38,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:34:38,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794351826] [2024-11-09 06:34:38,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:38,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:34:38,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:34:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:34:38,869 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-11-09 06:34:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:38,960 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2024-11-09 06:34:38,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:34:38,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2024-11-09 06:34:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:38,962 INFO L225 Difference]: With dead ends: 37 [2024-11-09 06:34:38,962 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 06:34:38,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:34:38,963 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:38,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 06:34:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2024-11-09 06:34:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 30 states have internal predecessors, (35), 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) [2024-11-09 06:34:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-09 06:34:38,966 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 13 [2024-11-09 06:34:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:38,967 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-09 06:34:38,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-11-09 06:34:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-09 06:34:38,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 06:34:38,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:38,967 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:38,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 06:34:38,968 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:38,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -923861151, now seen corresponding path program 1 times [2024-11-09 06:34:38,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:38,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387146213] [2024-11-09 06:34:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:38,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:39,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387146213] [2024-11-09 06:34:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387146213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:39,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:34:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 06:34:39,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068857797] [2024-11-09 06:34:39,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:39,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 06:34:39,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 06:34:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:34:39,345 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2024-11-09 06:34:39,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:39,452 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-11-09 06:34:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:34:39,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 15 [2024-11-09 06:34:39,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:39,454 INFO L225 Difference]: With dead ends: 49 [2024-11-09 06:34:39,454 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 06:34:39,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:34:39,454 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:39,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 06:34:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-11-09 06:34:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 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) [2024-11-09 06:34:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-09 06:34:39,456 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2024-11-09 06:34:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:39,457 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-09 06:34:39,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2024-11-09 06:34:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-09 06:34:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 06:34:39,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:39,458 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:39,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 06:34:39,458 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:39,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash 524564475, now seen corresponding path program 1 times [2024-11-09 06:34:39,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:39,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804510377] [2024-11-09 06:34:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:39,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804510377] [2024-11-09 06:34:39,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804510377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877045920] [2024-11-09 06:34:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:39,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:39,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:39,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:34:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:39,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 06:34:39,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:39,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:34:40,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:34:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:40,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877045920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:34:40,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [720243266] [2024-11-09 06:34:40,135 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:34:40,135 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:34:40,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:34:40,136 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:34:40,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:34:41,038 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:34:42,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [720243266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:42,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:34:42,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 6, 6] total 30 [2024-11-09 06:34:42,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888493375] [2024-11-09 06:34:42,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:42,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:34:42,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:42,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:34:42,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-11-09 06:34:42,467 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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) [2024-11-09 06:34:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:43,067 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2024-11-09 06:34:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 06:34:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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 18 [2024-11-09 06:34:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:43,069 INFO L225 Difference]: With dead ends: 42 [2024-11-09 06:34:43,069 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:34:43,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 06:34:43,071 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:43,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 81 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:34:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:34:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-09 06:34:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 30 states have internal predecessors, (33), 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) [2024-11-09 06:34:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-11-09 06:34:43,074 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 18 [2024-11-09 06:34:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:43,074 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-11-09 06:34:43,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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) [2024-11-09 06:34:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-11-09 06:34:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 06:34:43,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:43,075 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:43,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:34:43,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:43,280 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:43,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:43,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1277758653, now seen corresponding path program 1 times [2024-11-09 06:34:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932333098] [2024-11-09 06:34:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:43,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932333098] [2024-11-09 06:34:43,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932333098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919627844] [2024-11-09 06:34:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:43,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:43,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:43,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:34:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:43,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 06:34:43,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:43,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:34:43,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:34:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:43,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919627844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:34:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591150121] [2024-11-09 06:34:43,958 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:34:43,958 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:34:43,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:34:43,960 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:34:43,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:34:46,785 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:34:49,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1967#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_34| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_32| Int)) (and (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_18| Int)) (and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_18| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_32|) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_18| 2147483646))) (<= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_34|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_32|)))' at error location [2024-11-09 06:34:49,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:34:49,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:34:49,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-09 06:34:49,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934851917] [2024-11-09 06:34:49,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:34:49,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:34:49,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:49,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:34:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 06:34:49,888 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2024-11-09 06:34:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:50,108 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2024-11-09 06:34:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:34:50,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 21 [2024-11-09 06:34:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:50,109 INFO L225 Difference]: With dead ends: 39 [2024-11-09 06:34:50,109 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:34:50,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:34:50,110 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:50,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:34:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:34:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-09 06:34:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 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) [2024-11-09 06:34:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-09 06:34:50,114 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 21 [2024-11-09 06:34:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:50,114 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-09 06:34:50,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2024-11-09 06:34:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-09 06:34:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:34:50,115 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:50,115 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:50,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:34:50,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:50,319 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:50,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -955811144, now seen corresponding path program 1 times [2024-11-09 06:34:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:50,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179345047] [2024-11-09 06:34:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:50,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:50,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179345047] [2024-11-09 06:34:50,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179345047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026212580] [2024-11-09 06:34:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:50,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:50,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:50,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:50,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:34:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:50,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 06:34:50,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:50,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 06:34:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:50,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:34:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:51,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026212580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:34:51,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744445209] [2024-11-09 06:34:51,144 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:34:51,144 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:34:51,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:34:51,145 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:34:51,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:34:53,244 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:34:56,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2204#(exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_36| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_36| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_36|) |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_36|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_24| Int)) (and (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_36|) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_24| 4294967296) 0)) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_24| 2147483646))) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (= |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_36| |ULTIMATE.start_cstrncmp_~s2#1.base|) (= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_36| 1) |ULTIMATE.start_cstrncmp_~s2#1.offset|)))' at error location [2024-11-09 06:34:56,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:34:56,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:34:56,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-11-09 06:34:56,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608717011] [2024-11-09 06:34:56,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:34:56,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 06:34:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 06:34:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:34:56,637 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 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) [2024-11-09 06:34:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:56,808 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-11-09 06:34:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:34:56,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 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 22 [2024-11-09 06:34:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:56,809 INFO L225 Difference]: With dead ends: 36 [2024-11-09 06:34:56,809 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 06:34:56,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:34:56,811 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:56,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 81 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:34:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 06:34:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-09 06:34:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2) internal successors, (36), 33 states have internal predecessors, (36), 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) [2024-11-09 06:34:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-11-09 06:34:56,816 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2024-11-09 06:34:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:56,816 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-11-09 06:34:56,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 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) [2024-11-09 06:34:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-11-09 06:34:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 06:34:56,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:56,818 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:56,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:34:57,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:57,019 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:34:57,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash 588492729, now seen corresponding path program 1 times [2024-11-09 06:34:57,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:57,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113431792] [2024-11-09 06:34:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:57,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:57,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113431792] [2024-11-09 06:34:57,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113431792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:57,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980962497] [2024-11-09 06:34:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:57,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:57,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:57,378 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:57,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:34:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:57,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 06:34:57,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:57,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:34:57,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:34:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:34:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980962497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:34:57,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519434435] [2024-11-09 06:34:57,809 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:34:57,809 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:34:57,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:34:57,809 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:34:57,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:34:59,649 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:02,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1519434435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:02,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:02,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8, 7, 7] total 33 [2024-11-09 06:35:02,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074527363] [2024-11-09 06:35:02,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:02,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:35:02,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:35:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:35:02,439 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2024-11-09 06:35:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:03,366 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2024-11-09 06:35:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 06:35:03,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 24 [2024-11-09 06:35:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:03,369 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:35:03,369 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:35:03,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:35:03,371 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:03,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:35:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:35:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 06:35:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 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) [2024-11-09 06:35:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-09 06:35:03,373 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 24 [2024-11-09 06:35:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:03,373 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-09 06:35:03,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2024-11-09 06:35:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-09 06:35:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 06:35:03,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:03,374 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:03,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:03,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:03,579 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:35:03,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1063396692, now seen corresponding path program 1 times [2024-11-09 06:35:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:03,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079105237] [2024-11-09 06:35:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:03,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:03,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:03,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079105237] [2024-11-09 06:35:03,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079105237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:03,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872382991] [2024-11-09 06:35:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:03,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:03,935 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:03,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:35:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:04,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 06:35:04,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:04,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:04,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:35:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872382991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357093577] [2024-11-09 06:35:04,341 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 06:35:04,342 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:04,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:04,342 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:04,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:06,086 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1357093577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:09,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:09,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [9, 8, 8] total 36 [2024-11-09 06:35:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958711273] [2024-11-09 06:35:09,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:09,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 06:35:09,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 06:35:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 06:35:09,619 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2024-11-09 06:35:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:10,515 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-11-09 06:35:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:35:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 25 [2024-11-09 06:35:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:10,516 INFO L225 Difference]: With dead ends: 32 [2024-11-09 06:35:10,516 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 06:35:10,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:35:10,517 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:10,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 285 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:35:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 06:35:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 06:35:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 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) [2024-11-09 06:35:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-11-09 06:35:10,518 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2024-11-09 06:35:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:10,519 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-11-09 06:35:10,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2024-11-09 06:35:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-11-09 06:35:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 06:35:10,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:10,520 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:10,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:35:10,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:10,721 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:35:10,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:10,721 INFO L85 PathProgramCache]: Analyzing trace with hash -269580729, now seen corresponding path program 2 times [2024-11-09 06:35:10,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:10,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267982258] [2024-11-09 06:35:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:10,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:11,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:11,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267982258] [2024-11-09 06:35:11,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267982258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:11,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558282591] [2024-11-09 06:35:11,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:35:11,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:11,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:11,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:11,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:35:11,360 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:35:11,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:11,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 06:35:11,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:11,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:35:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:11,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:13,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:35:13,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:35:13,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:35:13,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:35:13,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:35:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558282591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018042827] [2024-11-09 06:35:14,087 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:35:14,087 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:14,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:14,087 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:14,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:16,083 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:19,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2971#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_68| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_65| Int)) (and (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_43| Int)) (and (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_65|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_43| 4294967296) 0)) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_43| 2147483646))) (<= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_68|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_65|)))' at error location [2024-11-09 06:35:19,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:19,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:19,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 29 [2024-11-09 06:35:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422342590] [2024-11-09 06:35:19,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:19,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:35:19,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:35:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1855, Unknown=1, NotChecked=0, Total=1980 [2024-11-09 06:35:19,312 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 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) [2024-11-09 06:35:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:20,283 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2024-11-09 06:35:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:35:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 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 27 [2024-11-09 06:35:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:20,284 INFO L225 Difference]: With dead ends: 92 [2024-11-09 06:35:20,284 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 06:35:20,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=218, Invalid=3087, Unknown=1, NotChecked=0, Total=3306 [2024-11-09 06:35:20,286 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:20,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 114 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:35:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 06:35:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2024-11-09 06:35:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 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) [2024-11-09 06:35:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-11-09 06:35:20,290 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2024-11-09 06:35:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:20,291 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-11-09 06:35:20,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 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) [2024-11-09 06:35:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-11-09 06:35:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 06:35:20,292 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:20,292 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:20,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:35:20,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 06:35:20,493 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:35:20,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:20,494 INFO L85 PathProgramCache]: Analyzing trace with hash -382125019, now seen corresponding path program 3 times [2024-11-09 06:35:20,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:20,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339587117] [2024-11-09 06:35:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:20,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:20,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:20,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339587117] [2024-11-09 06:35:20,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339587117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:20,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248589942] [2024-11-09 06:35:20,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:35:20,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:20,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:20,840 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:20,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:35:20,968 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:35:20,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:20,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 06:35:20,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:21,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:21,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:35:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:21,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248589942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [5697460] [2024-11-09 06:35:21,445 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:35:21,445 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:21,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:21,448 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:21,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:23,023 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:25,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3354#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_79| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_76| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_79|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_76|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_50| Int)) (and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_50| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_76|) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_50| 4294967296) 0))))))' at error location [2024-11-09 06:35:25,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:25,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:25,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-11-09 06:35:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437678570] [2024-11-09 06:35:25,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:25,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:35:25,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:25,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:35:25,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:35:25,564 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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) [2024-11-09 06:35:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:25,846 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2024-11-09 06:35:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 06:35:25,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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 33 [2024-11-09 06:35:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:25,847 INFO L225 Difference]: With dead ends: 44 [2024-11-09 06:35:25,847 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 06:35:25,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:35:25,848 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:25,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 142 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:35:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 06:35:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2024-11-09 06:35:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 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) [2024-11-09 06:35:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-11-09 06:35:25,851 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2024-11-09 06:35:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:25,852 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-11-09 06:35:25,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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) [2024-11-09 06:35:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-11-09 06:35:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 06:35:25,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:25,853 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:25,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:35:26,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 06:35:26,058 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:35:26,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:26,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1039027734, now seen corresponding path program 2 times [2024-11-09 06:35:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:26,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562696088] [2024-11-09 06:35:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:26,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:26,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562696088] [2024-11-09 06:35:26,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562696088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574986439] [2024-11-09 06:35:26,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:35:26,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:26,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:26,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:26,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:35:26,622 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:35:26,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:26,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 06:35:26,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:26,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:26,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 06:35:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:27,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574986439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:27,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689621041] [2024-11-09 06:35:27,154 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:35:27,154 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:27,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:27,155 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:27,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:28,864 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:32,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3681#(exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_89| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_90| Int)) (and (= |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_89| |ULTIMATE.start_cstrncmp_~s2#1.base|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_90| 1) |ULTIMATE.start_cstrncmp_~s2#1.offset|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_57| Int)) (and (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_57| 4294967296) 0)) (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_57| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_90|))) (<= (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_89|) |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_90|)))' at error location [2024-11-09 06:35:32,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:32,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:32,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-09 06:35:32,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867612816] [2024-11-09 06:35:32,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:32,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:35:32,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:35:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:35:32,114 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 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) [2024-11-09 06:35:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:32,372 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2024-11-09 06:35:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:35:32,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 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 34 [2024-11-09 06:35:32,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:32,373 INFO L225 Difference]: With dead ends: 42 [2024-11-09 06:35:32,373 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 06:35:32,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 06:35:32,374 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:32,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:35:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 06:35:32,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-09 06:35:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 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) [2024-11-09 06:35:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-11-09 06:35:32,377 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 34 [2024-11-09 06:35:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:32,378 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-11-09 06:35:32,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 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) [2024-11-09 06:35:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-11-09 06:35:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 06:35:32,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:32,379 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:32,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:32,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 06:35:32,580 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:35:32,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2017780311, now seen corresponding path program 4 times [2024-11-09 06:35:32,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:32,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237696571] [2024-11-09 06:35:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:32,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:33,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:33,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237696571] [2024-11-09 06:35:33,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237696571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:33,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935658338] [2024-11-09 06:35:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:35:33,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:33,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:33,407 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:33,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:35:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:33,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-09 06:35:33,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:33,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:35:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:33,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:36,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:35:36,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:35:36,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:35:36,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:35:36,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:35:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:35:36,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935658338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:36,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702385499] [2024-11-09 06:35:36,538 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:35:36,538 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:36,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:36,539 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:36,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:38,066 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:41,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4048#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_99| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_95| Int)) (and (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_65| Int)) (and (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_65| 4294967296) 0)) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_95|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_65| 2147483646))) (<= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_99|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_95|)))' at error location [2024-11-09 06:35:41,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:41,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:41,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 16] total 33 [2024-11-09 06:35:41,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706011151] [2024-11-09 06:35:41,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:41,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 06:35:41,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:41,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 06:35:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2221, Unknown=1, NotChecked=0, Total=2352 [2024-11-09 06:35:41,905 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 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) [2024-11-09 06:35:43,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:43,905 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2024-11-09 06:35:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 06:35:43,906 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 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 39 [2024-11-09 06:35:43,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:43,906 INFO L225 Difference]: With dead ends: 124 [2024-11-09 06:35:43,906 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 06:35:43,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=252, Invalid=4303, Unknown=1, NotChecked=0, Total=4556 [2024-11-09 06:35:43,909 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:43,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 201 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:35:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 06:35:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2024-11-09 06:35:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 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) [2024-11-09 06:35:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2024-11-09 06:35:43,912 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2024-11-09 06:35:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:43,913 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2024-11-09 06:35:43,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 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) [2024-11-09 06:35:43,913 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2024-11-09 06:35:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 06:35:43,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:43,914 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:43,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:35:44,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 06:35:44,115 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:35:44,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1942860533, now seen corresponding path program 5 times [2024-11-09 06:35:44,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:44,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23231731] [2024-11-09 06:35:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:35:44,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:44,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23231731] [2024-11-09 06:35:44,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23231731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:44,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87885210] [2024-11-09 06:35:44,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:35:44,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:44,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:44,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:44,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:35:44,766 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:35:44,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:44,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:35:44,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:35:45,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:45,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 06:35:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:35:45,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87885210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:45,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850793474] [2024-11-09 06:35:45,457 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:35:45,457 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:45,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:45,457 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:45,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:46,986 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:50,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4566#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_108| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_112| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_112|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_108|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_73| Int)) (and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_108|) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_73| 4294967296) 0)) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_73| 2147483646)))))' at error location [2024-11-09 06:35:50,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:50,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:50,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-09 06:35:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153080721] [2024-11-09 06:35:50,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:50,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 06:35:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 06:35:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 06:35:50,461 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 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) [2024-11-09 06:35:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:50,973 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2024-11-09 06:35:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:35:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 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 45 [2024-11-09 06:35:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:50,974 INFO L225 Difference]: With dead ends: 56 [2024-11-09 06:35:50,974 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 06:35:50,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 06:35:50,976 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:50,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:35:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 06:35:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-11-09 06:35:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 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) [2024-11-09 06:35:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2024-11-09 06:35:50,979 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 45 [2024-11-09 06:35:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:50,979 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2024-11-09 06:35:50,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 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) [2024-11-09 06:35:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2024-11-09 06:35:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 06:35:50,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:50,981 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:51,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:35:51,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 06:35:51,185 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:35:51,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash -99132944, now seen corresponding path program 3 times [2024-11-09 06:35:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376417508] [2024-11-09 06:35:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:35:51,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:51,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376417508] [2024-11-09 06:35:51,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376417508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:51,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862385634] [2024-11-09 06:35:51,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:35:51,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:51,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:51,725 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:51,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:35:51,888 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:35:51,888 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:51,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 06:35:51,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:51,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 06:35:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:35:52,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:35:52,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862385634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:52,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000848600] [2024-11-09 06:35:52,663 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:35:52,669 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:52,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:52,669 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:52,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:54,164 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:57,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4998#(exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_129| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_128| Int)) (and (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) (= |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_128| |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_129| 1) |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_128|) |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_129|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_81| Int)) (and (<= 1 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_129|) (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_81| 4294967296) 0)) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_81| 2147483646)))))' at error location [2024-11-09 06:35:57,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:57,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:57,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-09 06:35:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404806487] [2024-11-09 06:35:57,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:57,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:35:57,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:35:57,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:35:57,511 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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) [2024-11-09 06:35:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:58,138 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2024-11-09 06:35:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:35:58,139 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 46 [2024-11-09 06:35:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:58,139 INFO L225 Difference]: With dead ends: 54 [2024-11-09 06:35:58,139 INFO L226 Difference]: Without dead ends: 54 [2024-11-09 06:35:58,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=250, Invalid=2612, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 06:35:58,141 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:58,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 202 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:35:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-09 06:35:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-09 06:35:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 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) [2024-11-09 06:35:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-11-09 06:35:58,144 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2024-11-09 06:35:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:58,145 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-11-09 06:35:58,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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) [2024-11-09 06:35:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-11-09 06:35:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 06:35:58,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:58,146 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:58,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:35:58,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 06:35:58,347 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:35:58,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash 914450959, now seen corresponding path program 6 times [2024-11-09 06:35:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:58,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220525516] [2024-11-09 06:35:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:36:00,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:00,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220525516] [2024-11-09 06:36:00,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220525516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:00,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333715991] [2024-11-09 06:36:00,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:36:00,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:00,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:00,197 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:00,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:36:00,356 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:36:00,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:00,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-09 06:36:00,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:00,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:36:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:36:01,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:01,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:36:01,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:36:01,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:36:01,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:36:01,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:36:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:36:02,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333715991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:02,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413096358] [2024-11-09 06:36:02,071 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:36:02,071 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:02,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:02,072 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:02,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:03,375 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:06,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5494#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_131| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_135| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_135|) 1) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_131|) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_131| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_135|)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_142| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_142|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_142|)))) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_135|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_131|)) 0))))' at error location [2024-11-09 06:36:06,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:06,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:06,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 54 [2024-11-09 06:36:06,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420399046] [2024-11-09 06:36:06,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:06,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-09 06:36:06,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:06,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-09 06:36:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=4599, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 06:36:06,324 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 54 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 54 states have internal predecessors, (128), 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) [2024-11-09 06:36:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:08,274 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2024-11-09 06:36:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-09 06:36:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 54 states have internal predecessors, (128), 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 51 [2024-11-09 06:36:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:08,275 INFO L225 Difference]: With dead ends: 139 [2024-11-09 06:36:08,275 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 06:36:08,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=382, Invalid=7450, Unknown=0, NotChecked=0, Total=7832 [2024-11-09 06:36:08,277 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:08,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 272 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:36:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 06:36:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2024-11-09 06:36:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 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) [2024-11-09 06:36:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2024-11-09 06:36:08,280 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2024-11-09 06:36:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:08,281 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2024-11-09 06:36:08,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 54 states have internal predecessors, (128), 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) [2024-11-09 06:36:08,281 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2024-11-09 06:36:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 06:36:08,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:08,282 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:08,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:08,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:08,484 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:36:08,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash -532851603, now seen corresponding path program 7 times [2024-11-09 06:36:08,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:08,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116942479] [2024-11-09 06:36:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:08,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 5 proven. 57 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:36:09,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:09,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116942479] [2024-11-09 06:36:09,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116942479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:09,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804767796] [2024-11-09 06:36:09,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:36:09,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:09,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:09,108 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:09,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:36:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:09,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:36:09,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:36:09,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:09,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:36:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:36:09,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804767796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:09,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [973343852] [2024-11-09 06:36:09,985 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:36:09,985 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:09,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:09,985 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:09,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:11,139 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:13,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6112#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_145| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_149| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_149|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_145|)) 0)) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_145|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_155| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_155|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_155|)))) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_149|) 1) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_145| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_149|))))' at error location [2024-11-09 06:36:13,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:13,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:13,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-11-09 06:36:13,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915169682] [2024-11-09 06:36:13,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:13,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:36:13,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:13,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:36:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1827, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:36:13,109 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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) [2024-11-09 06:36:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:13,561 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2024-11-09 06:36:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:36:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 57 [2024-11-09 06:36:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:13,562 INFO L225 Difference]: With dead ends: 68 [2024-11-09 06:36:13,562 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 06:36:13,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=174, Invalid=1988, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 06:36:13,564 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:13,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 191 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:36:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 06:36:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2024-11-09 06:36:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 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) [2024-11-09 06:36:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2024-11-09 06:36:13,566 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 57 [2024-11-09 06:36:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:13,567 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2024-11-09 06:36:13,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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) [2024-11-09 06:36:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2024-11-09 06:36:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 06:36:13,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:13,568 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:13,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:36:13,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-09 06:36:13,773 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:36:13,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash 661470926, now seen corresponding path program 4 times [2024-11-09 06:36:13,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:13,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108277081] [2024-11-09 06:36:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:36:14,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108277081] [2024-11-09 06:36:14,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108277081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115029565] [2024-11-09 06:36:14,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:36:14,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:14,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:14,588 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:14,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:36:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:14,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 06:36:14,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:36:14,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:15,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:36:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:36:15,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115029565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226588578] [2024-11-09 06:36:15,365 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:36:15,365 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:15,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:15,366 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:15,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:16,394 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:18,084 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6636#(exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_172| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_170| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_170|) |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_172|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_172|)))' at error location [2024-11-09 06:36:18,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:18,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:18,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2024-11-09 06:36:18,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620186264] [2024-11-09 06:36:18,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:18,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:36:18,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:36:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:36:18,087 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 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) [2024-11-09 06:36:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:18,562 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2024-11-09 06:36:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:36:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 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 58 [2024-11-09 06:36:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:18,563 INFO L225 Difference]: With dead ends: 66 [2024-11-09 06:36:18,564 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 06:36:18,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=200, Invalid=2250, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 06:36:18,565 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:18,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 250 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:36:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 06:36:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-09 06:36:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 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) [2024-11-09 06:36:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2024-11-09 06:36:18,568 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 58 [2024-11-09 06:36:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:18,569 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2024-11-09 06:36:18,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 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) [2024-11-09 06:36:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2024-11-09 06:36:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 06:36:18,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:18,570 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:18,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 06:36:18,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-09 06:36:18,770 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:36:18,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:18,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1576149007, now seen corresponding path program 8 times [2024-11-09 06:36:18,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:18,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360462783] [2024-11-09 06:36:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:18,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:36:19,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:19,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360462783] [2024-11-09 06:36:19,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360462783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:19,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35806338] [2024-11-09 06:36:19,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:19,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:19,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:19,778 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:19,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:36:20,059 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:36:20,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:20,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-09 06:36:20,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:20,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:36:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 9 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:21,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:21,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:36:21,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:36:21,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:36:21,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:36:21,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:36:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:36:22,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35806338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:22,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137476871] [2024-11-09 06:36:22,149 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:36:22,149 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:22,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:22,149 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:22,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:23,342 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:26,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7225#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_173| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_169| Int)) (and (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_186| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_186|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_186|)))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_173|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_169|)) 0)) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_173|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_169|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_173|) 1) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_169|)))' at error location [2024-11-09 06:36:26,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:26,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:26,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 22] total 59 [2024-11-09 06:36:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70437571] [2024-11-09 06:36:26,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:26,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 06:36:26,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 06:36:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=5306, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 06:36:26,578 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 59 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 59 states have internal predecessors, (164), 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) [2024-11-09 06:36:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:29,283 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2024-11-09 06:36:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-09 06:36:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 59 states have internal predecessors, (164), 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 63 [2024-11-09 06:36:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:29,284 INFO L225 Difference]: With dead ends: 191 [2024-11-09 06:36:29,284 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 06:36:29,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=462, Invalid=10044, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 06:36:29,286 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:29,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 512 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 06:36:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 06:36:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2024-11-09 06:36:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 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) [2024-11-09 06:36:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-11-09 06:36:29,289 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2024-11-09 06:36:29,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:29,290 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-11-09 06:36:29,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 59 states have internal predecessors, (164), 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) [2024-11-09 06:36:29,290 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-11-09 06:36:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 06:36:29,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:29,290 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:29,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:36:29,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-09 06:36:29,491 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:36:29,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2013500717, now seen corresponding path program 9 times [2024-11-09 06:36:29,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:29,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761862034] [2024-11-09 06:36:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:29,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:30,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761862034] [2024-11-09 06:36:30,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761862034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:30,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888640510] [2024-11-09 06:36:30,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:36:30,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:30,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:30,233 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:30,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:36:30,483 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:36:30,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:30,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 06:36:30,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:30,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:31,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 06:36:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:31,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888640510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:31,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482585197] [2024-11-09 06:36:31,552 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:36:31,552 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:31,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:31,553 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:31,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:32,579 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:34,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8005#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_185| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_189| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_189|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_185|)) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_203| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_201| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_203|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_203| 1) (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_201|)) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_201|) 1))) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_189|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_185|) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_189|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_185|)))' at error location [2024-11-09 06:36:34,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:34,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:34,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2024-11-09 06:36:34,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055946122] [2024-11-09 06:36:34,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:34,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 06:36:34,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 06:36:34,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 06:36:34,701 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 37 states, 36 states have (on average 4.0) internal successors, (144), 36 states have internal predecessors, (144), 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) [2024-11-09 06:36:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:35,123 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2024-11-09 06:36:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 06:36:35,123 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.0) internal successors, (144), 36 states have internal predecessors, (144), 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 69 [2024-11-09 06:36:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:35,124 INFO L225 Difference]: With dead ends: 80 [2024-11-09 06:36:35,124 INFO L226 Difference]: Without dead ends: 80 [2024-11-09 06:36:35,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:36:35,125 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:35,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 190 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:36:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-09 06:36:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2024-11-09 06:36:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 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) [2024-11-09 06:36:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2024-11-09 06:36:35,127 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2024-11-09 06:36:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:35,128 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2024-11-09 06:36:35,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.0) internal successors, (144), 36 states have internal predecessors, (144), 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) [2024-11-09 06:36:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2024-11-09 06:36:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 06:36:35,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:35,129 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:35,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:35,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 06:36:35,329 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:36:35,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:35,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2005988648, now seen corresponding path program 5 times [2024-11-09 06:36:35,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:35,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519111022] [2024-11-09 06:36:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:35,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 12 proven. 93 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:36,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:36,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519111022] [2024-11-09 06:36:36,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519111022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:36,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850481314] [2024-11-09 06:36:36,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:36,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:36,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:36,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:36,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 06:36:36,564 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:36:36,565 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:36,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 06:36:36,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:36,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 06:36:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 79 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:36,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 79 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:37,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850481314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:37,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933772650] [2024-11-09 06:36:37,644 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:36:37,644 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:37,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:37,645 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:37,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:38,698 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:40,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8182#true' at error location [2024-11-09 06:36:40,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:40,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:40,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2024-11-09 06:36:40,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364693298] [2024-11-09 06:36:40,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:40,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 06:36:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 06:36:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3100, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 06:36:40,454 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 45 states, 44 states have (on average 3.840909090909091) internal successors, (169), 45 states have internal predecessors, (169), 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) [2024-11-09 06:36:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:41,017 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2024-11-09 06:36:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 06:36:41,017 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.840909090909091) internal successors, (169), 45 states have internal predecessors, (169), 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 70 [2024-11-09 06:36:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:41,018 INFO L225 Difference]: With dead ends: 78 [2024-11-09 06:36:41,018 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 06:36:41,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=407, Invalid=3753, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 06:36:41,019 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:41,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 267 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:36:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 06:36:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-09 06:36:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 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) [2024-11-09 06:36:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2024-11-09 06:36:41,022 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 70 [2024-11-09 06:36:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:41,023 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2024-11-09 06:36:41,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.840909090909091) internal successors, (169), 45 states have internal predecessors, (169), 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) [2024-11-09 06:36:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2024-11-09 06:36:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 06:36:41,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:41,024 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:41,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 06:36:41,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 06:36:41,225 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:36:41,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash 459280855, now seen corresponding path program 10 times [2024-11-09 06:36:41,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:41,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000174917] [2024-11-09 06:36:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 11 proven. 120 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:42,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:42,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000174917] [2024-11-09 06:36:42,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000174917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:42,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575252194] [2024-11-09 06:36:42,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:36:42,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:42,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:42,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 06:36:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:42,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-09 06:36:42,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:42,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:36:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 11 proven. 120 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:43,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:46,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:36:46,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:36:46,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:36:46,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:36:46,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:36:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 11 proven. 120 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:36:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575252194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470365495] [2024-11-09 06:36:46,694 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:36:46,695 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:46,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:46,695 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:46,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:47,859 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:50,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9317#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_210| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_215| Int)) (and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_215|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_210|)) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_210|) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_215|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_210|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_215|) 1) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_235| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_235|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_235|))))))' at error location [2024-11-09 06:36:50,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:50,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:50,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 25] total 50 [2024-11-09 06:36:50,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48256315] [2024-11-09 06:36:50,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:50,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 06:36:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 06:36:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4109, Unknown=1, NotChecked=0, Total=4290 [2024-11-09 06:36:50,886 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 50 states, 50 states have (on average 3.22) internal successors, (161), 50 states have internal predecessors, (161), 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) [2024-11-09 06:36:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:53,928 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2024-11-09 06:36:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-09 06:36:53,928 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.22) internal successors, (161), 50 states have internal predecessors, (161), 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 75 [2024-11-09 06:36:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:53,929 INFO L225 Difference]: With dead ends: 223 [2024-11-09 06:36:53,929 INFO L226 Difference]: Without dead ends: 88 [2024-11-09 06:36:53,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=376, Invalid=9129, Unknown=1, NotChecked=0, Total=9506 [2024-11-09 06:36:53,931 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 2497 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:53,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 560 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2497 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:36:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-09 06:36:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-11-09 06:36:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 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) [2024-11-09 06:36:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2024-11-09 06:36:53,934 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 75 [2024-11-09 06:36:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:53,934 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2024-11-09 06:36:53,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.22) internal successors, (161), 50 states have internal predecessors, (161), 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) [2024-11-09 06:36:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2024-11-09 06:36:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 06:36:53,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:53,935 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:53,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:54,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 06:36:54,136 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:36:54,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:54,136 INFO L85 PathProgramCache]: Analyzing trace with hash -129429323, now seen corresponding path program 11 times [2024-11-09 06:36:54,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790643415] [2024-11-09 06:36:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:54,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 22 proven. 125 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:36:54,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:54,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790643415] [2024-11-09 06:36:54,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790643415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:54,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642123506] [2024-11-09 06:36:54,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:54,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:54,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:54,983 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:54,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 06:36:55,398 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 06:36:55,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:55,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 06:36:55,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 40 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:36:55,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:56,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 06:36:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 40 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:36:56,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642123506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:56,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019857787] [2024-11-09 06:36:56,546 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:36:56,546 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:56,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:56,547 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:56,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:57,677 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:59,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10227#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_232| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_227| Int)) (and (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_232|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_227|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_232|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_227|)) 0)) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_251| Int)) (and (= 1 (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_251|)) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_251|)))) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_227|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_232|) 1)))' at error location [2024-11-09 06:36:59,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:59,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:59,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2024-11-09 06:36:59,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314357652] [2024-11-09 06:36:59,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:59,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 06:36:59,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 06:36:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 06:36:59,673 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 43 states, 42 states have (on average 4.095238095238095) internal successors, (172), 42 states have internal predecessors, (172), 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) [2024-11-09 06:37:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:00,313 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2024-11-09 06:37:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 06:37:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.095238095238095) internal successors, (172), 42 states have internal predecessors, (172), 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 81 [2024-11-09 06:37:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:00,314 INFO L225 Difference]: With dead ends: 92 [2024-11-09 06:37:00,314 INFO L226 Difference]: Without dead ends: 92 [2024-11-09 06:37:00,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 192 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=394, Invalid=3766, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 06:37:00,316 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:00,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 204 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:37:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-09 06:37:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2024-11-09 06:37:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 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) [2024-11-09 06:37:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2024-11-09 06:37:00,319 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 81 [2024-11-09 06:37:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:00,320 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2024-11-09 06:37:00,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.095238095238095) internal successors, (172), 42 states have internal predecessors, (172), 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) [2024-11-09 06:37:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2024-11-09 06:37:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-09 06:37:00,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:00,321 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:00,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 06:37:00,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 06:37:00,521 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:37:00,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:00,522 INFO L85 PathProgramCache]: Analyzing trace with hash 282659718, now seen corresponding path program 6 times [2024-11-09 06:37:00,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:00,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833038117] [2024-11-09 06:37:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:00,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 22 proven. 131 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:37:01,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:01,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833038117] [2024-11-09 06:37:01,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833038117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:01,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152015853] [2024-11-09 06:37:01,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:37:01,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:01,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:01,539 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:01,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 06:37:01,901 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:37:01,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:01,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 06:37:01,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:01,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 06:37:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 35 proven. 118 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:37:02,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 35 proven. 118 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:37:03,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152015853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:03,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887733501] [2024-11-09 06:37:03,504 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:37:03,504 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:03,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:03,505 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:03,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:04,611 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:06,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10967#(and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|))' at error location [2024-11-09 06:37:06,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:06,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:06,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2024-11-09 06:37:06,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951640315] [2024-11-09 06:37:06,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:06,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 06:37:06,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 06:37:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=3072, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 06:37:06,540 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 44 states, 43 states have (on average 3.8372093023255816) internal successors, (165), 43 states have internal predecessors, (165), 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) [2024-11-09 06:37:07,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:07,148 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2024-11-09 06:37:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 06:37:07,149 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.8372093023255816) internal successors, (165), 43 states have internal predecessors, (165), 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 82 [2024-11-09 06:37:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:07,149 INFO L225 Difference]: With dead ends: 90 [2024-11-09 06:37:07,150 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 06:37:07,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=421, Invalid=3869, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 06:37:07,151 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:07,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 363 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:37:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 06:37:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-09 06:37:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 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) [2024-11-09 06:37:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2024-11-09 06:37:07,154 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 82 [2024-11-09 06:37:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:07,155 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2024-11-09 06:37:07,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.8372093023255816) internal successors, (165), 43 states have internal predecessors, (165), 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) [2024-11-09 06:37:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2024-11-09 06:37:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 06:37:07,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:07,156 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:07,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 06:37:07,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:07,361 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:37:07,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:07,361 INFO L85 PathProgramCache]: Analyzing trace with hash 974997049, now seen corresponding path program 12 times [2024-11-09 06:37:07,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:07,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508084751] [2024-11-09 06:37:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:07,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 13 proven. 171 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:37:08,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:08,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508084751] [2024-11-09 06:37:08,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508084751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:08,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282368735] [2024-11-09 06:37:08,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:37:08,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:08,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:08,676 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:08,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 06:37:09,149 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:37:09,149 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:09,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-09 06:37:09,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:09,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:37:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 13 proven. 171 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:37:10,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:11,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:37:11,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:37:11,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:37:11,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:37:11,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:37:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 13 proven. 171 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:37:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282368735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688695052] [2024-11-09 06:37:12,243 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:37:12,243 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:12,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:12,244 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:12,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:13,510 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:16,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11763#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_261| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_256| Int)) (and (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_261|) 1) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_256|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_289| Int)) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_289|)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_289|) 1))) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_256| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_261|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_261|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_256|)) 0))))' at error location [2024-11-09 06:37:16,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:16,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:16,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 28] total 71 [2024-11-09 06:37:16,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77583489] [2024-11-09 06:37:16,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:16,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-09 06:37:16,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:16,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-09 06:37:16,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=7041, Unknown=0, NotChecked=0, Total=7310 [2024-11-09 06:37:16,823 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 71 states, 71 states have (on average 2.943661971830986) internal successors, (209), 71 states have internal predecessors, (209), 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) [2024-11-09 06:37:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:21,114 INFO L93 Difference]: Finished difference Result 257 states and 262 transitions. [2024-11-09 06:37:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-09 06:37:21,114 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.943661971830986) internal successors, (209), 71 states have internal predecessors, (209), 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 87 [2024-11-09 06:37:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:21,115 INFO L225 Difference]: With dead ends: 257 [2024-11-09 06:37:21,115 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 06:37:21,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=560, Invalid=14692, Unknown=0, NotChecked=0, Total=15252 [2024-11-09 06:37:21,118 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 3306 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:21,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 658 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3306 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 06:37:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 06:37:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2024-11-09 06:37:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 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) [2024-11-09 06:37:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2024-11-09 06:37:21,121 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 87 [2024-11-09 06:37:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:21,122 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2024-11-09 06:37:21,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.943661971830986) internal successors, (209), 71 states have internal predecessors, (209), 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) [2024-11-09 06:37:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2024-11-09 06:37:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-09 06:37:21,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:21,123 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:21,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 06:37:21,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:21,328 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:37:21,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash 463686811, now seen corresponding path program 13 times [2024-11-09 06:37:21,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:21,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699675103] [2024-11-09 06:37:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 35 proven. 168 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:22,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699675103] [2024-11-09 06:37:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699675103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333846456] [2024-11-09 06:37:22,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:37:22,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:22,279 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:22,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 06:37:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:22,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-09 06:37:22,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 51 proven. 152 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:23,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:23,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:37:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 51 proven. 152 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:23,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333846456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135464861] [2024-11-09 06:37:23,771 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:37:23,771 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:23,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:23,771 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:23,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:24,866 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:27,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12799#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_281| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_276| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_281|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_276|)) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_308| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_308|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_308|)))) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_276| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_281|)) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_281|) 1) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_276|)))' at error location [2024-11-09 06:37:27,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:27,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:27,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 38 [2024-11-09 06:37:27,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018860290] [2024-11-09 06:37:27,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:27,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 06:37:27,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 06:37:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 06:37:27,019 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 40 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 39 states have internal predecessors, (157), 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) [2024-11-09 06:37:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:27,736 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2024-11-09 06:37:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 06:37:27,737 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 39 states have internal predecessors, (157), 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 93 [2024-11-09 06:37:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:27,737 INFO L225 Difference]: With dead ends: 104 [2024-11-09 06:37:27,737 INFO L226 Difference]: Without dead ends: 104 [2024-11-09 06:37:27,738 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 230 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=268, Invalid=3038, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 06:37:27,738 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:27,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:37:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-09 06:37:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2024-11-09 06:37:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 100 states have internal predecessors, (103), 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) [2024-11-09 06:37:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2024-11-09 06:37:27,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2024-11-09 06:37:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:27,744 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2024-11-09 06:37:27,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 39 states have internal predecessors, (157), 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) [2024-11-09 06:37:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2024-11-09 06:37:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-09 06:37:27,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:27,745 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:27,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 06:37:27,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 06:37:27,946 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:37:27,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1489390688, now seen corresponding path program 7 times [2024-11-09 06:37:27,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:27,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119454952] [2024-11-09 06:37:27,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:27,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 35 proven. 175 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:28,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:28,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119454952] [2024-11-09 06:37:28,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119454952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:28,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202616442] [2024-11-09 06:37:28,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:37:28,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:28,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:28,904 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:28,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 06:37:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:29,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-09 06:37:29,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 51 proven. 159 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:29,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:29,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:37:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 51 proven. 159 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:29,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202616442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875104427] [2024-11-09 06:37:29,953 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:37:29,953 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:29,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:29,954 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:29,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:31,073 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:32,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13024#true' at error location [2024-11-09 06:37:32,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:32,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:32,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2024-11-09 06:37:32,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603880229] [2024-11-09 06:37:32,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:32,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 06:37:32,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:32,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 06:37:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1910, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 06:37:32,990 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 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) [2024-11-09 06:37:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:33,647 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2024-11-09 06:37:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 06:37:33,648 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 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 94 [2024-11-09 06:37:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:33,649 INFO L225 Difference]: With dead ends: 102 [2024-11-09 06:37:33,649 INFO L226 Difference]: Without dead ends: 102 [2024-11-09 06:37:33,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 245 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=215, Invalid=2541, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 06:37:33,650 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:33,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 317 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:37:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-09 06:37:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-09 06:37:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 1.04) internal successors, (104), 101 states have internal predecessors, (104), 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) [2024-11-09 06:37:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2024-11-09 06:37:33,653 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 94 [2024-11-09 06:37:33,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:33,654 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2024-11-09 06:37:33,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 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) [2024-11-09 06:37:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2024-11-09 06:37:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 06:37:33,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:33,655 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:33,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 06:37:33,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:33,856 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:37:33,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:33,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2005369441, now seen corresponding path program 14 times [2024-11-09 06:37:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:33,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686500835] [2024-11-09 06:37:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 15 proven. 231 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:35,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:35,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686500835] [2024-11-09 06:37:35,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686500835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287973364] [2024-11-09 06:37:35,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:37:35,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:35,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:35,477 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:35,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 06:37:36,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:37:36,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:36,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-09 06:37:36,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:36,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:37:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 15 proven. 231 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:37,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:38,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:37:38,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2024-11-09 06:37:38,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2024-11-09 06:37:38,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:37:38,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2024-11-09 06:37:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 15 proven. 231 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:37:38,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287973364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036745578] [2024-11-09 06:37:38,787 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:37:38,787 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:38,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:38,788 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:38,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:40,290 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:44,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14489#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_313| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_301| Int)) (and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_313|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_301|)) 0)) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_313|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_301|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_313|) 1) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_301|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_350| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_350|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_350|))))))' at error location [2024-11-09 06:37:44,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:44,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:44,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 55 [2024-11-09 06:37:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438406598] [2024-11-09 06:37:44,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:44,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-09 06:37:44,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-09 06:37:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=4792, Unknown=0, NotChecked=0, Total=4970 [2024-11-09 06:37:44,083 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 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) [2024-11-09 06:37:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:48,828 INFO L93 Difference]: Finished difference Result 289 states and 294 transitions. [2024-11-09 06:37:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-09 06:37:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 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 99 [2024-11-09 06:37:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:48,830 INFO L225 Difference]: With dead ends: 289 [2024-11-09 06:37:48,830 INFO L226 Difference]: Without dead ends: 112 [2024-11-09 06:37:48,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 245 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=406, Invalid=12250, Unknown=0, NotChecked=0, Total=12656 [2024-11-09 06:37:48,831 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 3677 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 3699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:48,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 798 Invalid, 3699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3677 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-09 06:37:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-09 06:37:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2024-11-09 06:37:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 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) [2024-11-09 06:37:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2024-11-09 06:37:48,835 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 99 [2024-11-09 06:37:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:48,836 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2024-11-09 06:37:48,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 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) [2024-11-09 06:37:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2024-11-09 06:37:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-09 06:37:48,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:48,837 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:48,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 06:37:49,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-09 06:37:49,042 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:37:49,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1209168125, now seen corresponding path program 15 times [2024-11-09 06:37:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461168286] [2024-11-09 06:37:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:49,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 51 proven. 217 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:37:50,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:50,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461168286] [2024-11-09 06:37:50,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461168286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:50,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366987491] [2024-11-09 06:37:50,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:37:50,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:50,299 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:50,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 06:37:50,858 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:37:50,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:37:50,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 06:37:50,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 70 proven. 198 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:37:51,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:52,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 06:37:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 70 proven. 198 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:37:52,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366987491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:52,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132183869] [2024-11-09 06:37:52,712 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:37:52,712 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:52,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:52,714 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:52,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:54,208 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:56,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15662#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_335| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_323| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_335|) 1) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_371| Int)) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_371|)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_371|) 1))) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_323| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_335|)) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_335|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_323|)) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_323|)))' at error location [2024-11-09 06:37:56,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:56,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:56,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 50 [2024-11-09 06:37:56,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989409434] [2024-11-09 06:37:56,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:56,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 06:37:56,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 06:37:56,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=4154, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 06:37:56,988 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 52 states, 51 states have (on average 4.0588235294117645) internal successors, (207), 51 states have internal predecessors, (207), 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) [2024-11-09 06:37:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:58,006 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2024-11-09 06:37:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 06:37:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.0588235294117645) internal successors, (207), 51 states have internal predecessors, (207), 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 105 [2024-11-09 06:37:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:58,008 INFO L225 Difference]: With dead ends: 116 [2024-11-09 06:37:58,008 INFO L226 Difference]: Without dead ends: 116 [2024-11-09 06:37:58,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=442, Invalid=4388, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 06:37:58,009 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:58,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 451 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:37:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-09 06:37:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-11-09 06:37:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 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) [2024-11-09 06:37:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2024-11-09 06:37:58,013 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 105 [2024-11-09 06:37:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:58,014 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2024-11-09 06:37:58,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.0588235294117645) internal successors, (207), 51 states have internal predecessors, (207), 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) [2024-11-09 06:37:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2024-11-09 06:37:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-09 06:37:58,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:58,015 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:58,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-09 06:37:58,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-09 06:37:58,216 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:37:58,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1170492354, now seen corresponding path program 8 times [2024-11-09 06:37:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:58,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318382765] [2024-11-09 06:37:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 51 proven. 225 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:37:59,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:59,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318382765] [2024-11-09 06:37:59,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318382765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:59,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741227301] [2024-11-09 06:37:59,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:37:59,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:59,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:59,694 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:59,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 06:38:00,709 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:38:00,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:00,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-09 06:38:00,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 77 proven. 199 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:38:01,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:02,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 06:38:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 77 proven. 199 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:38:02,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741227301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:02,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825648853] [2024-11-09 06:38:02,494 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:38:02,495 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:02,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:02,495 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:02,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:03,818 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:06,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16595#(exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_394| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_399| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_394|) |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_399|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_399|)))' at error location [2024-11-09 06:38:06,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:06,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:06,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2024-11-09 06:38:06,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243449904] [2024-11-09 06:38:06,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:06,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-09 06:38:06,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-09 06:38:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4363, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 06:38:06,284 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 54 states, 53 states have (on average 4.188679245283019) internal successors, (222), 54 states have internal predecessors, (222), 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) [2024-11-09 06:38:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:07,290 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2024-11-09 06:38:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 06:38:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.188679245283019) internal successors, (222), 54 states have internal predecessors, (222), 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 106 [2024-11-09 06:38:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:07,292 INFO L225 Difference]: With dead ends: 114 [2024-11-09 06:38:07,292 INFO L226 Difference]: Without dead ends: 114 [2024-11-09 06:38:07,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 258 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=615, Invalid=5547, Unknown=0, NotChecked=0, Total=6162 [2024-11-09 06:38:07,293 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:07,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 447 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:38:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-09 06:38:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-09 06:38:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 113 states have internal predecessors, (116), 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) [2024-11-09 06:38:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2024-11-09 06:38:07,297 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 106 [2024-11-09 06:38:07,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:07,297 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2024-11-09 06:38:07,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.188679245283019) internal successors, (222), 54 states have internal predecessors, (222), 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) [2024-11-09 06:38:07,298 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2024-11-09 06:38:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-09 06:38:07,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:07,298 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:07,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 06:38:07,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:07,499 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:38:07,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash 102715521, now seen corresponding path program 16 times [2024-11-09 06:38:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:07,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335640114] [2024-11-09 06:38:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:07,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 17 proven. 300 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:38:09,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:09,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335640114] [2024-11-09 06:38:09,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335640114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:09,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260368227] [2024-11-09 06:38:09,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:38:09,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:09,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:09,139 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:09,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 06:38:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:09,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-11-09 06:38:09,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:09,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:38:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 17 proven. 300 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:38:10,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:14,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:38:14,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:38:14,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:38:14,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:38:14,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:38:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 17 proven. 300 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:38:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260368227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338843001] [2024-11-09 06:38:14,893 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:38:14,893 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:14,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:14,893 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:14,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:16,118 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:20,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17585#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_371| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_358| Int)) (and (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_371|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_358|) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_358|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_418| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_423| Int)) (and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_418|) 1) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_423|) (<= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_423| 1) (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_418|)))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_371|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_358|)) 0)) (= 1 (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_371|))))' at error location [2024-11-09 06:38:20,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:20,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:20,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 34] total 68 [2024-11-09 06:38:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999097534] [2024-11-09 06:38:20,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:20,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-09 06:38:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-09 06:38:20,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=6749, Unknown=1, NotChecked=0, Total=6972 [2024-11-09 06:38:20,311 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 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) [2024-11-09 06:38:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:27,023 INFO L93 Difference]: Finished difference Result 322 states and 327 transitions. [2024-11-09 06:38:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-09 06:38:27,024 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 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 111 [2024-11-09 06:38:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:27,025 INFO L225 Difference]: With dead ends: 322 [2024-11-09 06:38:27,025 INFO L226 Difference]: Without dead ends: 124 [2024-11-09 06:38:27,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 270 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=508, Invalid=16521, Unknown=1, NotChecked=0, Total=17030 [2024-11-09 06:38:27,026 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 4577 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:27,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 976 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4577 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-09 06:38:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-09 06:38:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2024-11-09 06:38:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 119 states have internal predecessors, (122), 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) [2024-11-09 06:38:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2024-11-09 06:38:27,030 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 111 [2024-11-09 06:38:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:27,030 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2024-11-09 06:38:27,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 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) [2024-11-09 06:38:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2024-11-09 06:38:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 06:38:27,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:27,032 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:27,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-09 06:38:27,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:27,233 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:38:27,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash 831844963, now seen corresponding path program 17 times [2024-11-09 06:38:27,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812630505] [2024-11-09 06:38:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:27,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 70 proven. 272 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:28,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812630505] [2024-11-09 06:38:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812630505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581000729] [2024-11-09 06:38:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:38:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:28,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:28,592 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:28,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 06:38:29,544 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 06:38:29,545 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:29,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-09 06:38:29,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:30,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:31,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 06:38:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:31,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581000729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:31,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434758500] [2024-11-09 06:38:31,646 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:38:31,646 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:31,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:31,647 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:31,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:33,468 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:36,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18891#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_382| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_395| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_395|) 1) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_441| Int)) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_441|)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_441|) 1))) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_395|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_382|)) 0)) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_395|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_382|) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_382|)))' at error location [2024-11-09 06:38:36,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:36,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:36,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2024-11-09 06:38:36,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112397867] [2024-11-09 06:38:36,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:36,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-09 06:38:36,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-09 06:38:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=4866, Unknown=0, NotChecked=0, Total=5402 [2024-11-09 06:38:36,318 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 58 states, 57 states have (on average 4.280701754385965) internal successors, (244), 57 states have internal predecessors, (244), 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) [2024-11-09 06:38:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:37,450 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2024-11-09 06:38:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:38:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.280701754385965) internal successors, (244), 57 states have internal predecessors, (244), 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 117 [2024-11-09 06:38:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:37,452 INFO L225 Difference]: With dead ends: 128 [2024-11-09 06:38:37,452 INFO L226 Difference]: Without dead ends: 128 [2024-11-09 06:38:37,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 287 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=693, Invalid=6279, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 06:38:37,453 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:37,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 393 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:38:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-09 06:38:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2024-11-09 06:38:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 states have internal predecessors, (127), 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) [2024-11-09 06:38:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2024-11-09 06:38:37,456 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 117 [2024-11-09 06:38:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:37,456 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2024-11-09 06:38:37,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.280701754385965) internal successors, (244), 57 states have internal predecessors, (244), 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) [2024-11-09 06:38:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2024-11-09 06:38:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 06:38:37,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:37,457 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:37,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-09 06:38:37,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:37,658 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:38:37,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash 17391512, now seen corresponding path program 9 times [2024-11-09 06:38:37,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:37,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115596606] [2024-11-09 06:38:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:37,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 70 proven. 281 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:39,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115596606] [2024-11-09 06:38:39,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115596606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660324055] [2024-11-09 06:38:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:38:39,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:39,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:39,134 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:39,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 06:38:39,808 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:38:39,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:39,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-09 06:38:39,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:39,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 06:38:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 92 proven. 259 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:40,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 92 proven. 259 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660324055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657825186] [2024-11-09 06:38:42,446 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:38:42,446 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:42,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:42,446 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:42,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:43,964 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:46,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19940#(and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|))' at error location [2024-11-09 06:38:46,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:46,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:46,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-11-09 06:38:46,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320498810] [2024-11-09 06:38:46,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:46,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-09 06:38:46,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-09 06:38:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=4812, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 06:38:46,857 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 58 states, 57 states have (on average 4.0) internal successors, (228), 58 states have internal predecessors, (228), 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) [2024-11-09 06:38:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:48,341 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2024-11-09 06:38:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:38:48,342 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.0) internal successors, (228), 58 states have internal predecessors, (228), 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 118 [2024-11-09 06:38:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:48,343 INFO L225 Difference]: With dead ends: 126 [2024-11-09 06:38:48,343 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 06:38:48,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=566, Invalid=6406, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 06:38:48,345 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:48,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 770 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:38:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 06:38:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-09 06:38:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 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) [2024-11-09 06:38:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2024-11-09 06:38:48,349 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 118 [2024-11-09 06:38:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:48,349 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2024-11-09 06:38:48,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.0) internal successors, (228), 58 states have internal predecessors, (228), 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) [2024-11-09 06:38:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2024-11-09 06:38:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 06:38:48,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:48,351 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:48,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 06:38:48,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:48,552 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:38:48,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1572384103, now seen corresponding path program 18 times [2024-11-09 06:38:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:48,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163041345] [2024-11-09 06:38:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:50,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163041345] [2024-11-09 06:38:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163041345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:50,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707132130] [2024-11-09 06:38:50,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:38:50,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:50,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:50,507 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:50,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 06:38:51,098 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:38:51,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:38:51,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 195 conjuncts are in the unsatisfiable core [2024-11-09 06:38:51,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:51,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:38:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:53,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:56,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:38:56,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:38:56,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:38:56,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:38:56,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:38:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:38:57,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707132130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:57,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145024850] [2024-11-09 06:38:57,160 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:38:57,160 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:57,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:57,161 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:57,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:38:58,478 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:03,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21056#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_434| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_421| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_434|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_421|)) 0)) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_434|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_421|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_492| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_492|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_492|)))) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_421|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_434|) 1)))' at error location [2024-11-09 06:39:03,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:03,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:39:03,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 37, 37] total 95 [2024-11-09 06:39:03,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245141203] [2024-11-09 06:39:03,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:03,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-09 06:39:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:03,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-09 06:39:03,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=11858, Unknown=0, NotChecked=0, Total=12210 [2024-11-09 06:39:03,824 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 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) [2024-11-09 06:39:12,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:12,807 INFO L93 Difference]: Finished difference Result 356 states and 361 transitions. [2024-11-09 06:39:12,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-11-09 06:39:12,808 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 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 123 [2024-11-09 06:39:12,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:12,809 INFO L225 Difference]: With dead ends: 356 [2024-11-09 06:39:12,809 INFO L226 Difference]: Without dead ends: 136 [2024-11-09 06:39:12,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4491 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=757, Invalid=25975, Unknown=0, NotChecked=0, Total=26732 [2024-11-09 06:39:12,812 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 6414 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:12,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1109 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6414 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-09 06:39:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-09 06:39:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2024-11-09 06:39:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 131 states have internal predecessors, (134), 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) [2024-11-09 06:39:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2024-11-09 06:39:12,817 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 123 [2024-11-09 06:39:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:12,817 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2024-11-09 06:39:12,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 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) [2024-11-09 06:39:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2024-11-09 06:39:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 06:39:12,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:12,819 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:39:12,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-09 06:39:13,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:13,020 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:39:13,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash 978285893, now seen corresponding path program 19 times [2024-11-09 06:39:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:13,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893638361] [2024-11-09 06:39:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:13,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 92 proven. 333 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:14,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893638361] [2024-11-09 06:39:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893638361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150775769] [2024-11-09 06:39:14,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:39:14,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:14,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:14,402 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:14,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 06:39:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:14,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-09 06:39:14,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 117 proven. 308 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:15,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:16,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:39:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 117 proven. 308 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:16,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150775769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:39:16,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622037368] [2024-11-09 06:39:16,565 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:39:16,565 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:16,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:16,566 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:16,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:17,984 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:20,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22487#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_460| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_447| Int)) (and (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_447|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_460|) 1) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_517| Int)) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_517|)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_517|) 1))) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_460|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_447|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_460|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_447|)) 0))))' at error location [2024-11-09 06:39:20,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:20,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:39:20,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 51 [2024-11-09 06:39:20,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118398252] [2024-11-09 06:39:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:20,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 06:39:20,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 06:39:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=4323, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 06:39:20,940 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 53 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 states have internal predecessors, (211), 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) [2024-11-09 06:39:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:22,208 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2024-11-09 06:39:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 06:39:22,209 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 states have internal predecessors, (211), 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 129 [2024-11-09 06:39:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:22,210 INFO L225 Difference]: With dead ends: 140 [2024-11-09 06:39:22,210 INFO L226 Difference]: Without dead ends: 140 [2024-11-09 06:39:22,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 329 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=408, Invalid=4562, Unknown=0, NotChecked=0, Total=4970 [2024-11-09 06:39:22,211 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:22,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 566 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:39:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-09 06:39:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2024-11-09 06:39:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 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) [2024-11-09 06:39:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2024-11-09 06:39:22,214 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 129 [2024-11-09 06:39:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:22,215 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2024-11-09 06:39:22,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 states have internal predecessors, (211), 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) [2024-11-09 06:39:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2024-11-09 06:39:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 06:39:22,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:22,217 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:39:22,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-09 06:39:22,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-09 06:39:22,418 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:39:22,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash 262093046, now seen corresponding path program 10 times [2024-11-09 06:39:22,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:22,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213632192] [2024-11-09 06:39:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 92 proven. 343 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:23,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:23,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213632192] [2024-11-09 06:39:23,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213632192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:23,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252503725] [2024-11-09 06:39:23,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:39:23,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:23,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:23,920 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:23,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 06:39:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:24,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-09 06:39:24,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 117 proven. 318 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:24,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:25,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:39:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 117 proven. 318 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:25,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252503725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:39:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415710145] [2024-11-09 06:39:25,383 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:39:25,383 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:25,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:25,383 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:25,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:26,505 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:28,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22784#true' at error location [2024-11-09 06:39:28,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:28,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:39:28,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2024-11-09 06:39:28,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213492103] [2024-11-09 06:39:28,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:28,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 06:39:28,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:28,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 06:39:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2741, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:39:28,728 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 41 states, 40 states have (on average 4.325) internal successors, (173), 41 states have internal predecessors, (173), 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) [2024-11-09 06:39:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:30,115 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2024-11-09 06:39:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 06:39:30,116 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.325) internal successors, (173), 41 states have internal predecessors, (173), 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 130 [2024-11-09 06:39:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:30,117 INFO L225 Difference]: With dead ends: 138 [2024-11-09 06:39:30,117 INFO L226 Difference]: Without dead ends: 138 [2024-11-09 06:39:30,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 347 SyntacticMatches, 13 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=323, Invalid=3837, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 06:39:30,118 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:30,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 737 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:39:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-09 06:39:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-11-09 06:39:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 137 states have internal predecessors, (140), 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) [2024-11-09 06:39:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2024-11-09 06:39:30,122 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 130 [2024-11-09 06:39:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:30,122 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2024-11-09 06:39:30,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.325) internal successors, (173), 41 states have internal predecessors, (173), 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) [2024-11-09 06:39:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2024-11-09 06:39:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 06:39:30,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:30,124 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:39:30,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-09 06:39:30,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-09 06:39:30,325 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:39:30,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash 273284809, now seen corresponding path program 20 times [2024-11-09 06:39:30,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:30,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419741037] [2024-11-09 06:39:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:30,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 21 proven. 465 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:35,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419741037] [2024-11-09 06:39:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419741037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:35,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888658895] [2024-11-09 06:39:35,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:39:35,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:35,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:35,256 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:35,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 06:39:38,084 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:39:38,084 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:39:38,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-11-09 06:39:38,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:39,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 06:39:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 21 proven. 465 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:41,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:44,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:39:44,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:39:44,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:39:44,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:39:44,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:39:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 21 proven. 465 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:39:46,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888658895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:39:46,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065845295] [2024-11-09 06:39:46,804 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:39:46,804 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:46,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:46,805 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:46,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:48,050 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:53,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24830#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_500| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_487| Int)) (and (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_487|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_570| Int)) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_570|)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_570|) 1))) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_500|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_487|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_500|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_500|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_487|)) 0))))' at error location [2024-11-09 06:39:53,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:53,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:39:53,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40, 40] total 117 [2024-11-09 06:39:53,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448978436] [2024-11-09 06:39:53,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:53,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-09 06:39:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-09 06:39:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=16865, Unknown=0, NotChecked=0, Total=17292 [2024-11-09 06:39:53,426 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 117 states, 117 states have (on average 2.7094017094017095) internal successors, (317), 117 states have internal predecessors, (317), 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) [2024-11-09 06:40:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:04,772 INFO L93 Difference]: Finished difference Result 327 states and 332 transitions. [2024-11-09 06:40:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-09 06:40:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.7094017094017095) internal successors, (317), 117 states have internal predecessors, (317), 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 135 [2024-11-09 06:40:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:04,774 INFO L225 Difference]: With dead ends: 327 [2024-11-09 06:40:04,775 INFO L226 Difference]: Without dead ends: 148 [2024-11-09 06:40:04,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7032 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=824, Invalid=33216, Unknown=0, NotChecked=0, Total=34040 [2024-11-09 06:40:04,778 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 8663 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 8690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 8663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:04,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1804 Invalid, 8690 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 8663 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-09 06:40:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-09 06:40:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2024-11-09 06:40:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 1.028169014084507) internal successors, (146), 143 states have internal predecessors, (146), 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) [2024-11-09 06:40:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2024-11-09 06:40:04,783 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 135 [2024-11-09 06:40:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:04,783 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2024-11-09 06:40:04,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.7094017094017095) internal successors, (317), 117 states have internal predecessors, (317), 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) [2024-11-09 06:40:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2024-11-09 06:40:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-09 06:40:04,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:04,785 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:40:04,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-09 06:40:04,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:04,986 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:40:04,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1782537259, now seen corresponding path program 21 times [2024-11-09 06:40:04,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:04,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776051334] [2024-11-09 06:40:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:04,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 117 proven. 400 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:06,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:06,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776051334] [2024-11-09 06:40:06,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776051334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:06,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672198002] [2024-11-09 06:40:06,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:40:06,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:06,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:06,427 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:06,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 06:40:07,159 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:40:07,159 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:40:07,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-09 06:40:07,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 145 proven. 372 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:08,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:40:08,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 06:40:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 145 proven. 372 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:09,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672198002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:40:09,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663775088] [2024-11-09 06:40:09,670 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:40:09,670 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:40:09,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:40:09,671 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:40:09,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:40:10,667 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:40:13,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26330#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_515| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_528| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_528|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_515|)) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_603| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_597| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_603|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_603| 1) (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_597|)) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_597|) 1))) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_528|) 1) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_528|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_515|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_515|)))' at error location [2024-11-09 06:40:13,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:40:13,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:40:13,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 65 [2024-11-09 06:40:13,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765033589] [2024-11-09 06:40:13,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:40:13,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-09 06:40:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-09 06:40:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=6176, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 06:40:13,650 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 67 states, 66 states have (on average 4.090909090909091) internal successors, (270), 66 states have internal predecessors, (270), 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) [2024-11-09 06:40:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:14,915 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2024-11-09 06:40:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 06:40:14,916 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.090909090909091) internal successors, (270), 66 states have internal predecessors, (270), 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 141 [2024-11-09 06:40:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:14,917 INFO L225 Difference]: With dead ends: 152 [2024-11-09 06:40:14,917 INFO L226 Difference]: Without dead ends: 152 [2024-11-09 06:40:14,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 364 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=682, Invalid=6458, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 06:40:14,918 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:14,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 690 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2146 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:40:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-09 06:40:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2024-11-09 06:40:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 148 states have internal predecessors, (151), 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) [2024-11-09 06:40:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2024-11-09 06:40:14,922 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 141 [2024-11-09 06:40:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:14,922 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2024-11-09 06:40:14,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.090909090909091) internal successors, (270), 66 states have internal predecessors, (270), 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) [2024-11-09 06:40:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2024-11-09 06:40:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-09 06:40:14,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:14,924 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:40:14,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-09 06:40:15,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:15,124 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:40:15,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:15,125 INFO L85 PathProgramCache]: Analyzing trace with hash -575918384, now seen corresponding path program 11 times [2024-11-09 06:40:15,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:15,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715632507] [2024-11-09 06:40:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:15,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 117 proven. 411 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:16,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:16,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715632507] [2024-11-09 06:40:16,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715632507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:16,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121734521] [2024-11-09 06:40:16,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:40:16,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:16,933 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:16,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 06:40:19,164 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:40:19,164 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:40:19,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-09 06:40:19,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 155 proven. 373 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:20,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:40:21,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 06:40:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 155 proven. 373 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121734521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:40:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012545824] [2024-11-09 06:40:21,906 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:40:21,906 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:40:21,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:40:21,907 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:40:21,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:40:23,358 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:40:26,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27566#(and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|))' at error location [2024-11-09 06:40:26,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:40:26,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:40:26,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 68 [2024-11-09 06:40:26,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012232657] [2024-11-09 06:40:26,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:40:26,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-09 06:40:26,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-09 06:40:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=6233, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 06:40:26,048 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 69 states, 68 states have (on average 4.323529411764706) internal successors, (294), 69 states have internal predecessors, (294), 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) [2024-11-09 06:40:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:27,595 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2024-11-09 06:40:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 06:40:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.323529411764706) internal successors, (294), 69 states have internal predecessors, (294), 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 142 [2024-11-09 06:40:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:27,597 INFO L225 Difference]: With dead ends: 150 [2024-11-09 06:40:27,597 INFO L226 Difference]: Without dead ends: 150 [2024-11-09 06:40:27,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 355 SyntacticMatches, 14 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4121 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=974, Invalid=8146, Unknown=0, NotChecked=0, Total=9120 [2024-11-09 06:40:27,598 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:27,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 963 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:40:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-09 06:40:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-09 06:40:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 148 states have (on average 1.027027027027027) internal successors, (152), 149 states have internal predecessors, (152), 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) [2024-11-09 06:40:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2024-11-09 06:40:27,602 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 142 [2024-11-09 06:40:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:27,602 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2024-11-09 06:40:27,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.323529411764706) internal successors, (294), 69 states have internal predecessors, (294), 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) [2024-11-09 06:40:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2024-11-09 06:40:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-09 06:40:27,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:27,604 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:40:27,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-09 06:40:27,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:27,805 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:40:27,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1324441297, now seen corresponding path program 22 times [2024-11-09 06:40:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:27,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339479198] [2024-11-09 06:40:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 23 proven. 561 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:29,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:29,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339479198] [2024-11-09 06:40:29,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339479198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:29,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183897137] [2024-11-09 06:40:29,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:40:29,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:29,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:29,930 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:29,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-09 06:40:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:30,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-11-09 06:40:30,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:30,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:40:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 23 proven. 561 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:31,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:40:36,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:40:36,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:40:36,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:40:36,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:40:36,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:40:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 23 proven. 561 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:40:37,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183897137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:40:37,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717505653] [2024-11-09 06:40:37,088 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:40:37,088 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:40:37,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:40:37,089 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:40:37,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:40:38,043 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:40:42,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28868#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_559| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_573| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_573|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_559|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_663| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_656| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_663|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_656|) 1) (<= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_663| 1) (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_656|)) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_573|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_559|)) 0)) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_573|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_559|)))' at error location [2024-11-09 06:40:42,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:40:42,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:40:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 43] total 87 [2024-11-09 06:40:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948278992] [2024-11-09 06:40:42,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:40:42,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-09 06:40:42,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-09 06:40:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=10233, Unknown=1, NotChecked=0, Total=10506 [2024-11-09 06:40:42,573 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 87 states, 87 states have (on average 3.5057471264367814) internal successors, (305), 87 states have internal predecessors, (305), 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) [2024-11-09 06:40:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:53,691 INFO L93 Difference]: Finished difference Result 421 states and 426 transitions. [2024-11-09 06:40:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-11-09 06:40:53,692 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.5057471264367814) internal successors, (305), 87 states have internal predecessors, (305), 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 147 [2024-11-09 06:40:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:53,693 INFO L225 Difference]: With dead ends: 421 [2024-11-09 06:40:53,693 INFO L226 Difference]: Without dead ends: 160 [2024-11-09 06:40:53,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 366 SyntacticMatches, 3 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=664, Invalid=27057, Unknown=1, NotChecked=0, Total=27722 [2024-11-09 06:40:53,695 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 8527 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 8554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 8527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:53,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1781 Invalid, 8554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 8527 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-09 06:40:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-09 06:40:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2024-11-09 06:40:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.025974025974026) internal successors, (158), 155 states have internal predecessors, (158), 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) [2024-11-09 06:40:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2024-11-09 06:40:53,699 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 147 [2024-11-09 06:40:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:53,699 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2024-11-09 06:40:53,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.5057471264367814) internal successors, (305), 87 states have internal predecessors, (305), 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) [2024-11-09 06:40:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2024-11-09 06:40:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-09 06:40:53,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:53,701 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:40:53,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-09 06:40:53,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:53,902 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:40:53,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1303780749, now seen corresponding path program 23 times [2024-11-09 06:40:53,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:53,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908678528] [2024-11-09 06:40:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:53,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 145 proven. 473 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:40:55,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:55,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908678528] [2024-11-09 06:40:55,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908678528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:55,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495366522] [2024-11-09 06:40:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:40:55,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:55,806 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:55,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-09 06:41:01,644 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-09 06:41:01,644 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:41:01,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-09 06:41:01,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 187 proven. 431 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:41:03,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:41:04,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 06:41:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 187 proven. 431 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:41:04,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495366522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:41:04,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042896210] [2024-11-09 06:41:04,810 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:41:04,810 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:41:04,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:41:04,811 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:41:04,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:41:05,989 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:41:09,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30574#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_603| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_589| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_603|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_589|)) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_589|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_603|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_589| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_603|)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_685| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_685|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_685|))))))' at error location [2024-11-09 06:41:09,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:41:09,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:41:09,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 71 [2024-11-09 06:41:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944300951] [2024-11-09 06:41:09,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:41:09,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-09 06:41:09,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-09 06:41:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=7002, Unknown=0, NotChecked=0, Total=7832 [2024-11-09 06:41:09,052 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 73 states, 72 states have (on average 4.388888888888889) internal successors, (316), 72 states have internal predecessors, (316), 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) [2024-11-09 06:41:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:41:10,817 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2024-11-09 06:41:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 06:41:10,818 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 4.388888888888889) internal successors, (316), 72 states have internal predecessors, (316), 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 153 [2024-11-09 06:41:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:41:10,819 INFO L225 Difference]: With dead ends: 164 [2024-11-09 06:41:10,819 INFO L226 Difference]: Without dead ends: 164 [2024-11-09 06:41:10,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 383 SyntacticMatches, 15 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1074, Invalid=9228, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 06:41:10,820 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:41:10,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 639 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:41:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-09 06:41:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2024-11-09 06:41:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 160 states have internal predecessors, (163), 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) [2024-11-09 06:41:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2024-11-09 06:41:10,824 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 153 [2024-11-09 06:41:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:10,824 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2024-11-09 06:41:10,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 4.388888888888889) internal successors, (316), 72 states have internal predecessors, (316), 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) [2024-11-09 06:41:10,825 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2024-11-09 06:41:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-09 06:41:10,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:10,826 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:41:10,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-09 06:41:11,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-09 06:41:11,027 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:41:11,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1762498990, now seen corresponding path program 12 times [2024-11-09 06:41:11,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:11,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077741417] [2024-11-09 06:41:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:11,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 145 proven. 485 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:41:13,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:13,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077741417] [2024-11-09 06:41:13,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077741417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:13,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512417019] [2024-11-09 06:41:13,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:41:13,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:13,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:13,036 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 06:41:13,886 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:41:13,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:41:13,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-09 06:41:13,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:13,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 06:41:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 176 proven. 454 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:41:14,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:41:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 176 proven. 454 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:41:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512417019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:41:17,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279242652] [2024-11-09 06:41:17,071 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:41:17,071 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:41:17,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:41:17,071 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:41:17,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:41:18,189 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:41:20,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31933#(and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|))' at error location [2024-11-09 06:41:20,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:41:20,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:41:20,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 72 [2024-11-09 06:41:20,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545894476] [2024-11-09 06:41:20,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:41:20,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-09 06:41:20,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:20,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-09 06:41:20,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=6999, Unknown=0, NotChecked=0, Total=7832 [2024-11-09 06:41:20,962 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 74 states, 73 states have (on average 3.9863013698630136) internal successors, (291), 73 states have internal predecessors, (291), 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) [2024-11-09 06:41:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:41:22,648 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2024-11-09 06:41:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 06:41:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.9863013698630136) internal successors, (291), 73 states have internal predecessors, (291), 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 154 [2024-11-09 06:41:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:41:22,650 INFO L225 Difference]: With dead ends: 162 [2024-11-09 06:41:22,650 INFO L226 Difference]: Without dead ends: 162 [2024-11-09 06:41:22,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 400 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3975 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1003, Invalid=9299, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 06:41:22,651 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:41:22,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 936 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:41:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-09 06:41:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2024-11-09 06:41:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.025) internal successors, (164), 161 states have internal predecessors, (164), 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) [2024-11-09 06:41:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2024-11-09 06:41:22,655 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 154 [2024-11-09 06:41:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:22,655 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2024-11-09 06:41:22,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.9863013698630136) internal successors, (291), 73 states have internal predecessors, (291), 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) [2024-11-09 06:41:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2024-11-09 06:41:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 06:41:22,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:22,657 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:41:22,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-09 06:41:22,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:22,858 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:41:22,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1993560337, now seen corresponding path program 24 times [2024-11-09 06:41:22,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:22,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423511262] [2024-11-09 06:41:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:22,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 25 proven. 666 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:41:25,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:25,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423511262] [2024-11-09 06:41:25,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423511262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:25,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404620577] [2024-11-09 06:41:25,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:41:25,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:25,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:25,397 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:25,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-09 06:41:26,354 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:41:26,354 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:41:26,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-11-09 06:41:26,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:27,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:41:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 25 proven. 666 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:41:29,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:41:34,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:41:34,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:41:34,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:41:34,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:41:34,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:41:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 25 proven. 666 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:41:36,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404620577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:41:36,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522098734] [2024-11-09 06:41:36,161 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:41:36,162 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:41:36,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:41:36,162 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:41:36,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:41:37,116 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:41:42,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33365#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_637| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_641| Int)) (and (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_748| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_755| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_755|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_748|) 1) (<= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_755| 1) (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_748|)))) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_641|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_641|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_637|) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_637|) (not (= 0 (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_641|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_637|))))))' at error location [2024-11-09 06:41:42,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:41:42,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:41:42,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 46, 46] total 119 [2024-11-09 06:41:42,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860925718] [2024-11-09 06:41:42,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:41:42,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-11-09 06:41:42,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-11-09 06:41:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=17689, Unknown=0, NotChecked=0, Total=18090 [2024-11-09 06:41:42,849 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 119 states, 119 states have (on average 3.1176470588235294) internal successors, (371), 119 states have internal predecessors, (371), 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) [2024-11-09 06:41:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:41:57,945 INFO L93 Difference]: Finished difference Result 455 states and 460 transitions. [2024-11-09 06:41:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2024-11-09 06:41:57,945 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.1176470588235294) internal successors, (371), 119 states have internal predecessors, (371), 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 159 [2024-11-09 06:41:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:41:57,946 INFO L225 Difference]: With dead ends: 455 [2024-11-09 06:41:57,946 INFO L226 Difference]: Without dead ends: 172 [2024-11-09 06:41:57,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6393 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=900, Invalid=40106, Unknown=0, NotChecked=0, Total=41006 [2024-11-09 06:41:57,948 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 11620 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 11644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 11620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:41:57,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2270 Invalid, 11644 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 11620 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2024-11-09 06:41:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-09 06:41:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2024-11-09 06:41:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 167 states have internal predecessors, (170), 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) [2024-11-09 06:41:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2024-11-09 06:41:57,952 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 159 [2024-11-09 06:41:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:57,953 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2024-11-09 06:41:57,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.1176470588235294) internal successors, (371), 119 states have internal predecessors, (371), 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) [2024-11-09 06:41:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2024-11-09 06:41:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-09 06:41:57,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:57,955 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:41:57,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-09 06:41:58,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-09 06:41:58,156 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:41:58,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1544587763, now seen corresponding path program 25 times [2024-11-09 06:41:58,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:58,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561788778] [2024-11-09 06:41:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:58,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 176 proven. 552 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:41:59,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:59,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561788778] [2024-11-09 06:41:59,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561788778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:59,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883529908] [2024-11-09 06:41:59,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:41:59,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:59,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:59,994 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:59,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-09 06:42:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:00,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-09 06:42:00,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 210 proven. 518 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:42:01,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:02,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:42:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 210 proven. 518 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:42:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883529908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519814521] [2024-11-09 06:42:03,197 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:42:03,197 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:03,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:03,197 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:03,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:04,887 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:08,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35188#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_669| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_673| Int)) (and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_669|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_673|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_669|)) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_779| Int)) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_779|)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_779|) 1))) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_669| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_673|)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_673|) 1)))' at error location [2024-11-09 06:42:08,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:08,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 62 [2024-11-09 06:42:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940397209] [2024-11-09 06:42:08,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:08,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-09 06:42:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-09 06:42:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=5793, Unknown=0, NotChecked=0, Total=6320 [2024-11-09 06:42:08,416 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 64 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 states have internal predecessors, (265), 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) [2024-11-09 06:42:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:10,217 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2024-11-09 06:42:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:42:10,217 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 states have internal predecessors, (265), 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 165 [2024-11-09 06:42:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:10,218 INFO L225 Difference]: With dead ends: 176 [2024-11-09 06:42:10,218 INFO L226 Difference]: Without dead ends: 176 [2024-11-09 06:42:10,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 428 SyntacticMatches, 16 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3154 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=574, Invalid=6068, Unknown=0, NotChecked=0, Total=6642 [2024-11-09 06:42:10,219 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:10,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 780 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 06:42:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-09 06:42:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2024-11-09 06:42:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.023391812865497) internal successors, (175), 172 states have internal predecessors, (175), 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) [2024-11-09 06:42:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2024-11-09 06:42:10,222 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 165 [2024-11-09 06:42:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:10,222 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2024-11-09 06:42:10,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 states have internal predecessors, (265), 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) [2024-11-09 06:42:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2024-11-09 06:42:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-09 06:42:10,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:10,223 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:10,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-09 06:42:10,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-09 06:42:10,424 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:42:10,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:10,424 INFO L85 PathProgramCache]: Analyzing trace with hash 637581832, now seen corresponding path program 13 times [2024-11-09 06:42:10,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:10,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639624930] [2024-11-09 06:42:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:10,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 176 proven. 565 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:42:12,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:12,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639624930] [2024-11-09 06:42:12,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639624930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:12,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924651892] [2024-11-09 06:42:12,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:42:12,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:12,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:12,705 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:12,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-09 06:42:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:13,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-09 06:42:13,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 210 proven. 531 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:42:14,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:15,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:42:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 210 proven. 531 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:42:15,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924651892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:15,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1783083653] [2024-11-09 06:42:15,450 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:42:15,451 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:15,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:15,451 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:15,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:16,701 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:19,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36612#(and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|))' at error location [2024-11-09 06:42:19,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:19,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:19,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 64 [2024-11-09 06:42:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021005302] [2024-11-09 06:42:19,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:19,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 06:42:19,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 06:42:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=5758, Unknown=0, NotChecked=0, Total=6320 [2024-11-09 06:42:19,475 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 65 states, 64 states have (on average 4.125) internal successors, (264), 65 states have internal predecessors, (264), 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) [2024-11-09 06:42:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:21,572 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2024-11-09 06:42:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-09 06:42:21,573 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 4.125) internal successors, (264), 65 states have internal predecessors, (264), 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 166 [2024-11-09 06:42:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:21,573 INFO L225 Difference]: With dead ends: 174 [2024-11-09 06:42:21,574 INFO L226 Difference]: Without dead ends: 174 [2024-11-09 06:42:21,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 433 SyntacticMatches, 16 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=738, Invalid=8004, Unknown=0, NotChecked=0, Total=8742 [2024-11-09 06:42:21,575 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:21,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1258 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:42:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-09 06:42:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-11-09 06:42:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 173 states have internal predecessors, (176), 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) [2024-11-09 06:42:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2024-11-09 06:42:21,580 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 166 [2024-11-09 06:42:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:21,580 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2024-11-09 06:42:21,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 4.125) internal successors, (264), 65 states have internal predecessors, (264), 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) [2024-11-09 06:42:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2024-11-09 06:42:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-09 06:42:21,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:21,582 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:21,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-09 06:42:21,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-09 06:42:21,783 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:42:21,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:21,783 INFO L85 PathProgramCache]: Analyzing trace with hash 241719543, now seen corresponding path program 26 times [2024-11-09 06:42:21,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:21,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688411998] [2024-11-09 06:42:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:21,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 27 proven. 780 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:42:24,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688411998] [2024-11-09 06:42:24,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688411998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475687679] [2024-11-09 06:42:24,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:42:24,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:24,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:24,692 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:24,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-09 06:42:32,489 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 06:42:32,489 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:42:32,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 246 conjuncts are in the unsatisfiable core [2024-11-09 06:42:32,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:35,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 06:42:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 27 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:42:39,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:47,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:42:47,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:42:47,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:42:47,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:42:47,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:42:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 27 proven. 780 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:42:49,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475687679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:49,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34139695] [2024-11-09 06:42:49,356 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:42:49,356 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:49,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:49,357 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:49,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:50,667 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:58,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38165#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_720| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_711| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_711|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_711|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_720|)) 0)) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_720| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_711|)) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_720|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_846| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_846|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_846|))))))' at error location [2024-11-09 06:42:58,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:58,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:58,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 64, 49] total 142 [2024-11-09 06:42:58,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118649446] [2024-11-09 06:42:58,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:58,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2024-11-09 06:42:58,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2024-11-09 06:42:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=24351, Unknown=0, NotChecked=0, Total=24806 [2024-11-09 06:42:58,112 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand has 142 states, 142 states have (on average 3.056338028169014) internal successors, (434), 142 states have internal predecessors, (434), 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) [2024-11-09 06:43:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:43:18,501 INFO L93 Difference]: Finished difference Result 488 states and 493 transitions. [2024-11-09 06:43:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2024-11-09 06:43:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.056338028169014) internal successors, (434), 142 states have internal predecessors, (434), 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 171 [2024-11-09 06:43:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:43:18,503 INFO L225 Difference]: With dead ends: 488 [2024-11-09 06:43:18,503 INFO L226 Difference]: Without dead ends: 184 [2024-11-09 06:43:18,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 388 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9248 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=1097, Invalid=59665, Unknown=0, NotChecked=0, Total=60762 [2024-11-09 06:43:18,506 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 13925 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 13956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 13925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:43:18,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 2520 Invalid, 13956 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 13925 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2024-11-09 06:43:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-09 06:43:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2024-11-09 06:43:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 179 states have internal predecessors, (182), 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) [2024-11-09 06:43:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2024-11-09 06:43:18,514 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 171 [2024-11-09 06:43:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:43:18,515 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2024-11-09 06:43:18,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.056338028169014) internal successors, (434), 142 states have internal predecessors, (434), 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) [2024-11-09 06:43:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2024-11-09 06:43:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-09 06:43:18,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:43:18,517 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:43:18,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-09 06:43:18,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-09 06:43:18,718 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:43:18,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:43:18,718 INFO L85 PathProgramCache]: Analyzing trace with hash -721655339, now seen corresponding path program 27 times [2024-11-09 06:43:18,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:43:18,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313730219] [2024-11-09 06:43:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:43:18,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:43:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:43:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 210 proven. 637 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:43:20,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:43:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313730219] [2024-11-09 06:43:20,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313730219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:43:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836411013] [2024-11-09 06:43:20,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:43:20,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:43:20,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:43:20,848 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:43:20,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-09 06:43:22,588 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:43:22,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:43:22,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-09 06:43:22,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:43:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 247 proven. 600 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:43:24,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:43:25,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 06:43:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 247 proven. 600 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:43:26,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836411013] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:43:26,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485421876] [2024-11-09 06:43:26,421 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:43:26,421 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:43:26,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:43:26,421 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:43:26,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:43:27,960 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:43:31,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40165#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_745| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_754| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_745|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_754|)) 0)) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_879| Int)) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_879|)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_879|) 1))) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_754|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_745|) 1) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_754| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_745|))))' at error location [2024-11-09 06:43:31,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:43:31,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:43:31,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 79 [2024-11-09 06:43:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269287078] [2024-11-09 06:43:31,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:43:31,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-09 06:43:31,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:43:31,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-09 06:43:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=8381, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 06:43:31,674 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 81 states, 80 states have (on average 4.15) internal successors, (332), 80 states have internal predecessors, (332), 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) [2024-11-09 06:43:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:43:33,780 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2024-11-09 06:43:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:43:33,781 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 4.15) internal successors, (332), 80 states have internal predecessors, (332), 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 177 [2024-11-09 06:43:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:43:33,782 INFO L225 Difference]: With dead ends: 188 [2024-11-09 06:43:33,782 INFO L226 Difference]: Without dead ends: 188 [2024-11-09 06:43:33,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 463 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=977, Invalid=8529, Unknown=0, NotChecked=0, Total=9506 [2024-11-09 06:43:33,783 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 2916 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:43:33,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 916 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2916 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-09 06:43:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-09 06:43:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2024-11-09 06:43:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 184 states have internal predecessors, (187), 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) [2024-11-09 06:43:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2024-11-09 06:43:33,788 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 177 [2024-11-09 06:43:33,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:43:33,788 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2024-11-09 06:43:33,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 4.15) internal successors, (332), 80 states have internal predecessors, (332), 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) [2024-11-09 06:43:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2024-11-09 06:43:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-11-09 06:43:33,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:43:33,790 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:43:33,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-09 06:43:33,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-11-09 06:43:33,991 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:43:33,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:43:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash -896477594, now seen corresponding path program 14 times [2024-11-09 06:43:33,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:43:33,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156895018] [2024-11-09 06:43:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:43:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:43:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:43:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 210 proven. 651 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:43:36,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:43:36,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156895018] [2024-11-09 06:43:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156895018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:43:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335734896] [2024-11-09 06:43:36,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:43:36,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:43:36,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:43:36,051 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:43:36,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-09 06:43:48,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 06:43:48,383 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:43:48,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-09 06:43:48,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:43:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 260 proven. 601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:43:49,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:43:51,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 06:43:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 260 proven. 601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:43:51,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335734896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:43:51,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282674520] [2024-11-09 06:43:51,377 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:43:51,377 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:43:51,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:43:51,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:43:51,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:43:52,784 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:43:55,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41686#(and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|))' at error location [2024-11-09 06:43:55,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:43:55,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:43:55,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 67 [2024-11-09 06:43:55,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915463664] [2024-11-09 06:43:55,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:43:55,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-09 06:43:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:43:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-09 06:43:55,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=5985, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 06:43:55,816 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 68 states, 67 states have (on average 4.7611940298507465) internal successors, (319), 68 states have internal predecessors, (319), 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) [2024-11-09 06:43:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:43:57,812 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2024-11-09 06:43:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 06:43:57,813 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.7611940298507465) internal successors, (319), 68 states have internal predecessors, (319), 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 178 [2024-11-09 06:43:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:43:57,814 INFO L225 Difference]: With dead ends: 186 [2024-11-09 06:43:57,814 INFO L226 Difference]: Without dead ends: 186 [2024-11-09 06:43:57,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 467 SyntacticMatches, 17 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2756 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1142, Invalid=8364, Unknown=0, NotChecked=0, Total=9506 [2024-11-09 06:43:57,815 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 1 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:43:57,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 988 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:43:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-09 06:43:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2024-11-09 06:43:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 185 states have internal predecessors, (188), 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) [2024-11-09 06:43:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2024-11-09 06:43:57,818 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 178 [2024-11-09 06:43:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:43:57,818 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2024-11-09 06:43:57,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.7611940298507465) internal successors, (319), 68 states have internal predecessors, (319), 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) [2024-11-09 06:43:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2024-11-09 06:43:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-09 06:43:57,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:43:57,819 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:43:57,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-09 06:43:58,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-09 06:43:58,020 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:43:58,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:43:58,020 INFO L85 PathProgramCache]: Analyzing trace with hash 737232729, now seen corresponding path program 28 times [2024-11-09 06:43:58,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:43:58,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809819520] [2024-11-09 06:43:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:43:58,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:43:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:44:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 29 proven. 903 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:44:01,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:44:01,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809819520] [2024-11-09 06:44:01,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809819520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:44:01,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297941758] [2024-11-09 06:44:01,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:44:01,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:44:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:44:01,953 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:44:01,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-09 06:44:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:44:02,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 280 conjuncts are in the unsatisfiable core [2024-11-09 06:44:02,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:44:03,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:44:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 29 proven. 903 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:44:05,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:44:11,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:44:11,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:44:11,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:44:11,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:44:11,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:44:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 29 proven. 903 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:44:12,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297941758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:44:12,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717530300] [2024-11-09 06:44:12,097 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:44:12,098 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:44:12,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:44:12,098 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:44:12,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:44:13,430 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:44:19,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43299#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_807| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_799| Int)) (and (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_807|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_950| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_959| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_950|) 1) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_959|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_959| 1) (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_950|)))) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_799|) 1) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_807| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_799|)) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_799|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_807|)) 0))))' at error location [2024-11-09 06:44:19,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:44:19,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:44:19,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 52] total 104 [2024-11-09 06:44:19,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072807165] [2024-11-09 06:44:19,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:44:19,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-09 06:44:19,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:44:19,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-09 06:44:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=13961, Unknown=1, NotChecked=0, Total=14280 [2024-11-09 06:44:19,345 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand has 104 states, 104 states have (on average 3.625) internal successors, (377), 104 states have internal predecessors, (377), 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) [2024-11-09 06:44:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:44:35,976 INFO L93 Difference]: Finished difference Result 520 states and 525 transitions. [2024-11-09 06:44:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-11-09 06:44:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.625) internal successors, (377), 104 states have internal predecessors, (377), 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 183 [2024-11-09 06:44:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:44:35,977 INFO L225 Difference]: With dead ends: 520 [2024-11-09 06:44:35,977 INFO L226 Difference]: Without dead ends: 196 [2024-11-09 06:44:35,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 462 SyntacticMatches, 3 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4783 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=784, Invalid=37827, Unknown=1, NotChecked=0, Total=38612 [2024-11-09 06:44:35,979 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 2645 mSDsCounter, 0 mSdLazyCounter, 12848 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2678 SdHoareTripleChecker+Invalid, 12876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 12848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:44:35,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2678 Invalid, 12876 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [28 Valid, 12848 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2024-11-09 06:44:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-09 06:44:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2024-11-09 06:44:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 191 states have internal predecessors, (194), 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) [2024-11-09 06:44:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2024-11-09 06:44:35,983 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 183 [2024-11-09 06:44:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:44:35,983 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2024-11-09 06:44:35,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.625) internal successors, (377), 104 states have internal predecessors, (377), 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) [2024-11-09 06:44:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2024-11-09 06:44:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-09 06:44:35,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:44:35,985 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:44:36,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-09 06:44:36,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-09 06:44:36,186 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:44:36,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:44:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash -747209797, now seen corresponding path program 29 times [2024-11-09 06:44:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:44:36,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700036626] [2024-11-09 06:44:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:44:36,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:44:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:44:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 247 proven. 728 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:44:38,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:44:38,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700036626] [2024-11-09 06:44:38,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700036626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:44:38,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212663394] [2024-11-09 06:44:38,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:44:38,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:44:38,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:44:38,702 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:44:38,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-09 06:44:47,952 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 06:44:47,952 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:44:47,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-09 06:44:47,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:44:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 315 proven. 660 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:44:49,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:44:51,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 06:44:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 301 proven. 674 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:44:52,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212663394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:44:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290709650] [2024-11-09 06:44:52,827 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:44:52,827 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:44:52,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:44:52,827 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:44:52,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:44:53,984 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:44:57,753 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45398#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.base_835| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_843| Int)) (and (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_843|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrncmp_~s1#1.base_835|) (+ (- 1) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_843|)) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_~s1#1.base_835|) 1) (exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_994| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_985| Int)) (and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (= (select |#valid| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_985|) 1) (<= 0 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_994|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_994| 1) (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_985|)))) (= |v_ULTIMATE.start_cstrncmp_~s1#1.offset_843| (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_835|))))' at error location [2024-11-09 06:44:57,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:44:57,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:44:57,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 34] total 87 [2024-11-09 06:44:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373126118] [2024-11-09 06:44:57,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:44:57,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-09 06:44:57,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:44:57,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-09 06:44:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=9813, Unknown=0, NotChecked=0, Total=10920 [2024-11-09 06:44:57,757 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand has 89 states, 88 states have (on average 4.4772727272727275) internal successors, (394), 88 states have internal predecessors, (394), 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) [2024-11-09 06:45:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:45:01,358 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2024-11-09 06:45:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 06:45:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 4.4772727272727275) internal successors, (394), 88 states have internal predecessors, (394), 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 189 [2024-11-09 06:45:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:45:01,360 INFO L225 Difference]: With dead ends: 200 [2024-11-09 06:45:01,360 INFO L226 Difference]: Without dead ends: 200 [2024-11-09 06:45:01,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 494 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1773, Invalid=16587, Unknown=0, NotChecked=0, Total=18360 [2024-11-09 06:45:01,361 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 38 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:45:01,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 748 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:45:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-09 06:45:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2024-11-09 06:45:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 196 states have internal predecessors, (199), 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) [2024-11-09 06:45:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2024-11-09 06:45:01,366 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 189 [2024-11-09 06:45:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:45:01,367 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2024-11-09 06:45:01,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 4.4772727272727275) internal successors, (394), 88 states have internal predecessors, (394), 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) [2024-11-09 06:45:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2024-11-09 06:45:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-09 06:45:01,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:45:01,369 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:45:01,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-09 06:45:01,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-09 06:45:01,569 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:45:01,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:45:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1688665792, now seen corresponding path program 15 times [2024-11-09 06:45:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:45:01,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560447957] [2024-11-09 06:45:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:45:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:45:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:45:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 247 proven. 743 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:45:04,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:45:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560447957] [2024-11-09 06:45:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560447957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:45:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050679866] [2024-11-09 06:45:04,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:45:04,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:45:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:45:04,144 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:45:04,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-09 06:45:05,392 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:45:05,392 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:45:05,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-09 06:45:05,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:45:05,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 06:45:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 287 proven. 703 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:45:06,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:45:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 287 proven. 703 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:45:10,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050679866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:45:10,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827101161] [2024-11-09 06:45:10,488 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:45:10,488 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:45:10,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:45:10,488 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:45:10,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:45:11,688 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:45:15,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47095#(and (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.offset|))' at error location [2024-11-09 06:45:15,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:45:15,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:45:15,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 87 [2024-11-09 06:45:15,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096145480] [2024-11-09 06:45:15,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:45:15,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 06:45:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:45:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 06:45:15,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=942, Invalid=9564, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 06:45:15,569 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 88 states, 87 states have (on average 4.068965517241379) internal successors, (354), 88 states have internal predecessors, (354), 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) [2024-11-09 06:45:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:45:18,545 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2024-11-09 06:45:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-09 06:45:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 4.068965517241379) internal successors, (354), 88 states have internal predecessors, (354), 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 190 [2024-11-09 06:45:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:45:18,547 INFO L225 Difference]: With dead ends: 198 [2024-11-09 06:45:18,547 INFO L226 Difference]: Without dead ends: 198 [2024-11-09 06:45:18,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 500 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4077 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1181, Invalid=13099, Unknown=0, NotChecked=0, Total=14280 [2024-11-09 06:45:18,549 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 4 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 3278 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 3278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:45:18,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1664 Invalid, 3278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3278 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-09 06:45:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-09 06:45:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2024-11-09 06:45:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 197 states have internal predecessors, (200), 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) [2024-11-09 06:45:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2024-11-09 06:45:18,553 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 190 [2024-11-09 06:45:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:45:18,554 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2024-11-09 06:45:18,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 4.068965517241379) internal successors, (354), 88 states have internal predecessors, (354), 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) [2024-11-09 06:45:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2024-11-09 06:45:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 06:45:18,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:45:18,556 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:45:18,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-09 06:45:18,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:45:18,757 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:45:18,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:45:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1212951361, now seen corresponding path program 30 times [2024-11-09 06:45:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:45:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386267575] [2024-11-09 06:45:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:45:18,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:45:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:45:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 31 proven. 1035 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:45:23,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:45:23,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386267575] [2024-11-09 06:45:23,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386267575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:45:23,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944960024] [2024-11-09 06:45:23,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:45:23,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:45:23,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:45:23,151 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:45:23,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-09 06:45:24,955 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:45:24,956 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:45:24,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 211 conjuncts are in the unsatisfiable core [2024-11-09 06:45:24,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:45:24,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 06:45:26,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 06:45:26,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 06:45:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 31 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:45:28,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:45:28,672 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3837 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3837) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 15 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-09 06:45:28,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:45:28,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-09 06:45:28,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:45:28,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-09 06:45:28,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 06:45:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 31 proven. 1035 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:45:30,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944960024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:45:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224535498] [2024-11-09 06:45:30,483 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:45:30,483 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:45:30,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:45:30,484 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:45:30,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:45:32,231 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:45:39,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48795#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_900| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_892| Int)) (and (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_618| Int)) (and (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_618| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_900|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_618| 4294967296) 0)))) (<= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_892|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_900|)))' at error location [2024-11-09 06:45:39,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:45:39,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:45:39,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 53, 38] total 90 [2024-11-09 06:45:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359469752] [2024-11-09 06:45:39,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:45:39,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-09 06:45:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:45:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-09 06:45:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=10801, Unknown=1, NotChecked=208, Total=11342 [2024-11-09 06:45:39,741 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 91 states, 91 states have (on average 3.879120879120879) internal successors, (353), 90 states have internal predecessors, (353), 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) [2024-11-09 06:45:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:45:45,974 INFO L93 Difference]: Finished difference Result 351 states and 354 transitions. [2024-11-09 06:45:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-09 06:45:45,975 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.879120879120879) internal successors, (353), 90 states have internal predecessors, (353), 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 195 [2024-11-09 06:45:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:45:45,976 INFO L225 Difference]: With dead ends: 351 [2024-11-09 06:45:45,976 INFO L226 Difference]: Without dead ends: 203 [2024-11-09 06:45:45,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 514 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=402, Invalid=13881, Unknown=1, NotChecked=236, Total=14520 [2024-11-09 06:45:45,978 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 9164 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 9384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 9164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:45:45,978 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1786 Invalid, 9384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 9164 Invalid, 0 Unknown, 205 Unchecked, 5.0s Time] [2024-11-09 06:45:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-09 06:45:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2024-11-09 06:45:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 199 states have (on average 1.020100502512563) internal successors, (203), 200 states have internal predecessors, (203), 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) [2024-11-09 06:45:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2024-11-09 06:45:45,982 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 195 [2024-11-09 06:45:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:45:45,982 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2024-11-09 06:45:45,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.879120879120879) internal successors, (353), 90 states have internal predecessors, (353), 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) [2024-11-09 06:45:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2024-11-09 06:45:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-11-09 06:45:45,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:45:45,983 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:45:46,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-09 06:45:46,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:45:46,184 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:45:46,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:45:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1952959399, now seen corresponding path program 31 times [2024-11-09 06:45:46,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:45:46,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755168894] [2024-11-09 06:45:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:45:46,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:45:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:45:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 287 proven. 825 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:45:48,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:45:48,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755168894] [2024-11-09 06:45:48,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755168894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:45:48,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689048706] [2024-11-09 06:45:48,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:45:48,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:45:48,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:45:48,823 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:45:48,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-09 06:45:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:45:49,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-11-09 06:45:49,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:45:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 330 proven. 782 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:45:51,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:45:52,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 06:45:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 330 proven. 782 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:45:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689048706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:45:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79919436] [2024-11-09 06:45:53,689 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:45:53,689 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:45:53,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:45:53,689 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:45:53,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:45:55,580 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:46:01,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50651#(exists ((|v_ULTIMATE.start_cstrncmp_~s1#1.offset_939| Int) (|v_ULTIMATE.start_cstrncmp_~s1#1.base_931| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncmp_~s1#1.base_931|) |v_ULTIMATE.start_cstrncmp_~s1#1.offset_939|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_639| Int)) (and (<= 1 |v_ULTIMATE.start_cstrncmp_~s1#1.offset_939|) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_639| 4294967296) 0)) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_639| 2147483646) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|)))))' at error location [2024-11-09 06:46:01,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:46:01,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:46:01,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 75 [2024-11-09 06:46:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314356702] [2024-11-09 06:46:01,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:46:01,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-09 06:46:01,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:46:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-09 06:46:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=7829, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 06:46:01,387 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 77 states, 76 states have (on average 4.197368421052632) internal successors, (319), 76 states have internal predecessors, (319), 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) [2024-11-09 06:46:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:46:03,909 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2024-11-09 06:46:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 06:46:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 4.197368421052632) internal successors, (319), 76 states have internal predecessors, (319), 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 198 [2024-11-09 06:46:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:46:03,911 INFO L225 Difference]: With dead ends: 209 [2024-11-09 06:46:03,912 INFO L226 Difference]: Without dead ends: 209 [2024-11-09 06:46:03,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 518 SyntacticMatches, 19 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4393 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=784, Invalid=8146, Unknown=0, NotChecked=0, Total=8930 [2024-11-09 06:46:03,913 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:46:03,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 934 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-09 06:46:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-09 06:46:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2024-11-09 06:46:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 205 states have internal predecessors, (208), 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) [2024-11-09 06:46:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2024-11-09 06:46:03,924 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 198 [2024-11-09 06:46:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:46:03,924 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2024-11-09 06:46:03,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 4.197368421052632) internal successors, (319), 76 states have internal predecessors, (319), 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) [2024-11-09 06:46:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2024-11-09 06:46:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-11-09 06:46:03,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:46:03,931 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:46:03,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-09 06:46:04,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-09 06:46:04,135 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:46:04,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:46:04,136 INFO L85 PathProgramCache]: Analyzing trace with hash -412197790, now seen corresponding path program 16 times [2024-11-09 06:46:04,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:46:04,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421713886] [2024-11-09 06:46:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:46:04,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:46:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:46:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 47 proven. 1411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:46:11,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:46:11,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421713886] [2024-11-09 06:46:11,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421713886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:46:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340428312] [2024-11-09 06:46:11,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:46:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:46:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:46:11,331 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:46:11,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-09 06:46:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:46:12,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 298 conjuncts are in the unsatisfiable core [2024-11-09 06:46:12,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:46:13,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:46:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 47 proven. 1035 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:46:14,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:46:20,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:46:20,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2024-11-09 06:46:20,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 06:46:20,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:46:20,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-09 06:46:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 47 proven. 1035 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:46:21,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340428312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:46:21,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926777353] [2024-11-09 06:46:21,298 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:46:21,299 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:46:21,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:46:21,299 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:46:21,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:46:22,975 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:46:31,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52388#(exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_1148| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_1139| Int)) (and (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_1148| 1) |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= |ULTIMATE.start_cstrncmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_1139|) (<= (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_1139|) |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_1148|) (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_660| Int)) (and (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_660| 4294967296) 0)) (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_660| 2147483646) (<= 1 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_1148|)))))' at error location [2024-11-09 06:46:31,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:46:31,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:46:31,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 40, 55] total 114 [2024-11-09 06:46:31,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299681975] [2024-11-09 06:46:31,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:46:31,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-11-09 06:46:31,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:46:31,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-11-09 06:46:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=16381, Unknown=1, NotChecked=0, Total=16770 [2024-11-09 06:46:31,932 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand has 114 states, 114 states have (on average 3.1578947368421053) internal successors, (360), 114 states have internal predecessors, (360), 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) [2024-11-09 06:46:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:46:43,500 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2024-11-09 06:46:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-09 06:46:43,501 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.1578947368421053) internal successors, (360), 114 states have internal predecessors, (360), 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 199 [2024-11-09 06:46:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:46:43,502 INFO L225 Difference]: With dead ends: 312 [2024-11-09 06:46:43,502 INFO L226 Difference]: Without dead ends: 213 [2024-11-09 06:46:43,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 536 SyntacticMatches, 3 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4302 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=594, Invalid=25165, Unknown=1, NotChecked=0, Total=25760 [2024-11-09 06:46:43,506 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 44 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 13148 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3270 SdHoareTripleChecker+Invalid, 13178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 13148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:46:43,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3270 Invalid, 13178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 13148 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-09 06:46:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-09 06:46:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2024-11-09 06:46:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 208 states have internal predecessors, (211), 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) [2024-11-09 06:46:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2024-11-09 06:46:43,510 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 199 [2024-11-09 06:46:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:46:43,510 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2024-11-09 06:46:43,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.1578947368421053) internal successors, (360), 114 states have internal predecessors, (360), 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) [2024-11-09 06:46:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2024-11-09 06:46:43,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-09 06:46:43,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:46:43,513 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:46:43,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-09 06:46:43,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-09 06:46:43,714 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:46:43,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:46:43,714 INFO L85 PathProgramCache]: Analyzing trace with hash 607317790, now seen corresponding path program 17 times [2024-11-09 06:46:43,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:46:43,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352129230] [2024-11-09 06:46:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:46:43,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:46:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:46:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 287 proven. 841 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:46:46,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:46:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352129230] [2024-11-09 06:46:46,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352129230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:46:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482197706] [2024-11-09 06:46:46,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:46:46,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:46:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:46:46,500 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:46:46,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-09 06:47:04,109 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-09 06:47:04,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:47:04,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-09 06:47:04,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:47:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 345 proven. 783 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:47:05,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:47:07,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 06:47:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 345 proven. 783 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:47:07,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482197706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:47:07,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522857118] [2024-11-09 06:47:07,329 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:47:07,329 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:47:07,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:47:07,329 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:47:07,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:47:08,667 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:47:13,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54269#(exists ((|v_ULTIMATE.start_cstrncmp_#t~post2#1.base_1179| Int) (|v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_1189| Int)) (and (exists ((|v_ULTIMATE.start_cstrncmp_#t~pre10#1_681| Int)) (and (<= |v_ULTIMATE.start_cstrncmp_#t~pre10#1_681| 2147483646) (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= |ULTIMATE.start_cstrncmp_~n#1| 2147483646) (not (= (mod |v_ULTIMATE.start_cstrncmp_#t~pre10#1_681| 4294967296) 0)) (<= 1 |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_1189|))) (<= (select |#length| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_1179|) |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_1189|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (= (+ |v_ULTIMATE.start_cstrncmp_#t~post2#1.offset_1189| 1) |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |v_ULTIMATE.start_cstrncmp_#t~post2#1.base_1179|)))' at error location [2024-11-09 06:47:13,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:47:13,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:47:13,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 75 [2024-11-09 06:47:13,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719674222] [2024-11-09 06:47:13,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:47:13,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-09 06:47:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:47:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-09 06:47:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=7351, Unknown=0, NotChecked=0, Total=8372 [2024-11-09 06:47:13,650 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 76 states, 75 states have (on average 4.8133333333333335) internal successors, (361), 76 states have internal predecessors, (361), 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) [2024-11-09 06:47:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:47:16,162 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2024-11-09 06:47:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-09 06:47:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.8133333333333335) internal successors, (361), 76 states have internal predecessors, (361), 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 202 [2024-11-09 06:47:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:47:16,163 INFO L225 Difference]: With dead ends: 210 [2024-11-09 06:47:16,164 INFO L226 Difference]: Without dead ends: 210 [2024-11-09 06:47:16,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 532 SyntacticMatches, 19 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3339 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1420, Invalid=10352, Unknown=0, NotChecked=0, Total=11772 [2024-11-09 06:47:16,165 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 1 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:47:16,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1052 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 06:47:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-09 06:47:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2024-11-09 06:47:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 209 states have internal predecessors, (212), 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) [2024-11-09 06:47:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2024-11-09 06:47:16,169 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 202 [2024-11-09 06:47:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:47:16,170 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2024-11-09 06:47:16,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.8133333333333335) internal successors, (361), 76 states have internal predecessors, (361), 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) [2024-11-09 06:47:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2024-11-09 06:47:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-09 06:47:16,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:47:16,172 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:47:16,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-09 06:47:16,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-09 06:47:16,373 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:47:16,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:47:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1244012127, now seen corresponding path program 32 times [2024-11-09 06:47:16,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:47:16,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352971469] [2024-11-09 06:47:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:47:16,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:47:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:47:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 33 proven. 1176 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:47:20,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:47:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352971469] [2024-11-09 06:47:20,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352971469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:47:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765191274] [2024-11-09 06:47:20,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:47:20,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:47:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:47:20,051 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:47:20,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf9a8d99-0d5b-4778-a255-c0554f05e83d/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-09 06:47:43,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 06:47:43,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:47:43,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 290 conjuncts are in the unsatisfiable core [2024-11-09 06:47:43,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:47:46,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7