./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncpy-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_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/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_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/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_3ec99c6c-cb09-4082-b013-086178ec59e4/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 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:23:25,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:23:25,393 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 06:23:25,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:23:25,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:23:25,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:23:25,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:23:25,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:23:25,440 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:23:25,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:23:25,443 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:23:25,443 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:23:25,444 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:23:25,444 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:23:25,444 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:23:25,447 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:23:25,447 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:23:25,447 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:23:25,448 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:23:25,448 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:23:25,448 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:23:25,453 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:23:25,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 06:23:25,454 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 06:23:25,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:23:25,454 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:23:25,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:23:25,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:23:25,455 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:23:25,455 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 06:23:25,455 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 06:23:25,455 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 06:23:25,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:23:25,456 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 06:23:25,456 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:23:25,456 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 06:23:25,458 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:23:25,458 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:23:25,459 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:23:25,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:23:25,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:23:25,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:23:25,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:23:25,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:23:25,465 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:23:25,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:23:25,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:23:25,465 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:23:25,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:23:25,466 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_3ec99c6c-cb09-4082-b013-086178ec59e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 [2024-11-09 06:23:25,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:23:25,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:23:25,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:23:25,779 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:23:25,779 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:23:25,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i Unable to find full path for "g++" [2024-11-09 06:23:27,750 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:23:27,997 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:23:27,997 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2024-11-09 06:23:28,016 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/data/38f69a889/d80d89505e514d36924abdbebf622756/FLAG81a1f602b [2024-11-09 06:23:28,325 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/data/38f69a889/d80d89505e514d36924abdbebf622756 [2024-11-09 06:23:28,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:23:28,328 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:23:28,330 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:23:28,330 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:23:28,337 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:23:28,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2efea674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28, skipping insertion in model container [2024-11-09 06:23:28,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,383 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:23:28,776 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 06:23:28,777 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 06:23:28,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:23:28,794 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:23:28,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:23:28,896 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:23:28,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28 WrapperNode [2024-11-09 06:23:28,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:23:28,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:23:28,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:23:28,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:23:28,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,938 INFO L138 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2024-11-09 06:23:28,938 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:23:28,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:23:28,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:23:28,939 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:23:28,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,965 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,969 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,971 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:23:28,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:23:28,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:23:28,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:23:28,974 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (1/1) ... [2024-11-09 06:23:28,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:23:28,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:29,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:23:29,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:23:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:23:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:23:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:23:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:23:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:23:29,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:23:29,194 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:23:29,199 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:23:29,450 INFO L? ?]: Removed 54 outVars from TransFormulas that were not future-live. [2024-11-09 06:23:29,450 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:23:29,522 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:23:29,525 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:23:29,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:23:29 BoogieIcfgContainer [2024-11-09 06:23:29,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:23:29,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:23:29,532 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:23:29,536 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:23:29,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:23:28" (1/3) ... [2024-11-09 06:23:29,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73362e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:23:29, skipping insertion in model container [2024-11-09 06:23:29,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:23:28" (2/3) ... [2024-11-09 06:23:29,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73362e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:23:29, skipping insertion in model container [2024-11-09 06:23:29,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:23:29" (3/3) ... [2024-11-09 06:23:29,544 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca-2.i [2024-11-09 06:23:29,561 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:23:29,562 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-11-09 06:23:29,611 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:23:29,618 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;@4843303f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:23:29,618 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-09 06:23:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 2.125) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 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 06:23:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:23:29,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:29,634 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:23:29,634 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:29,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash 3653531, now seen corresponding path program 1 times [2024-11-09 06:23:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:29,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766642227] [2024-11-09 06:23:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:30,019 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 06:23:30,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:30,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766642227] [2024-11-09 06:23:30,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766642227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:30,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:30,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:23:30,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619902030] [2024-11-09 06:23:30,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:30,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:23:30,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:30,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:23:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:23:30,063 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 2.125) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 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 06:23:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:30,123 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-11-09 06:23:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:23:30,129 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 06:23:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:30,139 INFO L225 Difference]: With dead ends: 26 [2024-11-09 06:23:30,139 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 06:23:30,143 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 06:23:30,147 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:30,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:23:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 06:23:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 06:23:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.875) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 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 06:23:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-09 06:23:30,192 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 4 [2024-11-09 06:23:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:30,193 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-09 06:23:30,194 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 06:23:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-09 06:23:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:23:30,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:30,196 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:23:30,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:23:30,197 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:30,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:30,198 INFO L85 PathProgramCache]: Analyzing trace with hash 3653532, now seen corresponding path program 1 times [2024-11-09 06:23:30,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:30,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504880997] [2024-11-09 06:23:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:30,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:30,601 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 06:23:30,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:30,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504880997] [2024-11-09 06:23:30,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504880997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:23:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780423318] [2024-11-09 06:23:30,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:30,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:23:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:23:30,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:23:30,606 INFO L87 Difference]: Start difference. First operand 25 states and 30 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 06:23:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:30,758 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-09 06:23:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:23:30,759 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 06:23:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:30,760 INFO L225 Difference]: With dead ends: 28 [2024-11-09 06:23:30,760 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 06:23:30,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:23:30,762 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:30,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 06:23:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 06:23:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 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 06:23:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-09 06:23:30,772 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 4 [2024-11-09 06:23:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:30,772 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-09 06:23:30,772 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 06:23:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-09 06:23:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:23:30,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:30,773 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:23:30,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:23:30,774 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:30,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash 3664359, now seen corresponding path program 1 times [2024-11-09 06:23:30,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:30,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61189549] [2024-11-09 06:23:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:30,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:31,008 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 06:23:31,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61189549] [2024-11-09 06:23:31,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61189549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:31,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:31,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:23:31,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321989485] [2024-11-09 06:23:31,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:31,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:23:31,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:31,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:23:31,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:23:31,016 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 06:23:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:31,071 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2024-11-09 06:23:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:23:31,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 06:23:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:31,073 INFO L225 Difference]: With dead ends: 27 [2024-11-09 06:23:31,073 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 06:23:31,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:23:31,075 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:31,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 46 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:23:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 06:23:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 06:23:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.736842105263158) internal successors, (33), 26 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 06:23:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-11-09 06:23:31,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 4 [2024-11-09 06:23:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:31,079 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-11-09 06:23:31,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 06:23:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-11-09 06:23:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:23:31,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:31,080 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-09 06:23:31,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:23:31,081 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:31,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:31,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1469966111, now seen corresponding path program 1 times [2024-11-09 06:23:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:31,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716868810] [2024-11-09 06:23:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:31,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:31,573 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 06:23:31,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:31,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716868810] [2024-11-09 06:23:31,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716868810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:31,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845051268] [2024-11-09 06:23:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:31,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:31,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:31,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:31,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:23:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:31,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:23:31,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:31,772 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 06:23:31,784 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 8 treesize of output 1 [2024-11-09 06:23:32,000 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 06:23:32,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:32,226 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 06:23:32,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845051268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:32,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269910743] [2024-11-09 06:23:32,254 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-09 06:23:32,255 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:32,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:32,265 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:32,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:33,217 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:33,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '254#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet12#1|)) (<= |ULTIMATE.start_main_#t~nondet12#1| 127) (exists ((|v_ULTIMATE.start_main_~nondetString~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~i~0#1_34| Int) (|v_ULTIMATE.start_main_~nondetString~0#1.base_29| Int)) (and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_34|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_34| 2) |ULTIMATE.start_main_~length~0#1|) (<= 2 |v_ULTIMATE.start_main_~nondetString~0#1.base_29|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString~0#1.base_29|) |v_ULTIMATE.start_main_~i~0#1_34|) (= |v_ULTIMATE.start_main_~nondetString~0#1.offset_27| 0))))' at error location [2024-11-09 06:23:33,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:33,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 06:23:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874400980] [2024-11-09 06:23:33,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:33,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 06:23:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 06:23:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-09 06:23:33,569 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:23:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:33,805 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2024-11-09 06:23:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:23:33,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:23:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:33,807 INFO L225 Difference]: With dead ends: 27 [2024-11-09 06:23:33,807 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 06:23:33,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-09 06:23:33,808 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:33,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 98 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 06:23:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2024-11-09 06:23:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.6875) internal successors, (27), 22 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 06:23:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-09 06:23:33,813 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2024-11-09 06:23:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:33,813 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-09 06:23:33,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:23:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-09 06:23:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:23:33,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:33,814 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:33,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:23:34,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:34,016 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:34,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1792266002, now seen corresponding path program 1 times [2024-11-09 06:23:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:34,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853622790] [2024-11-09 06:23:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:34,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:34,329 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 06:23:34,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:34,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853622790] [2024-11-09 06:23:34,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853622790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:34,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:34,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:23:34,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764081796] [2024-11-09 06:23:34,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:34,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:23:34,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:23:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:23:34,333 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 06:23:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:34,429 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-11-09 06:23:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:23:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 06:23:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:34,431 INFO L225 Difference]: With dead ends: 32 [2024-11-09 06:23:34,432 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 06:23:34,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:23:34,433 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:34,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 72 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 06:23:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-09 06:23:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 28 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 06:23:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-11-09 06:23:34,438 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 7 [2024-11-09 06:23:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:34,446 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-11-09 06:23:34,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 06:23:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-11-09 06:23:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:23:34,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:34,447 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:34,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:23:34,447 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:34,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1792266001, now seen corresponding path program 1 times [2024-11-09 06:23:34,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:34,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608843792] [2024-11-09 06:23:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:34,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:34,509 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 06:23:34,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:34,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608843792] [2024-11-09 06:23:34,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608843792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:34,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:34,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:23:34,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546673481] [2024-11-09 06:23:34,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:34,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:23:34,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:23:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:23:34,512 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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 06:23:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:34,556 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-11-09 06:23:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:23:34,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 06:23:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:34,559 INFO L225 Difference]: With dead ends: 28 [2024-11-09 06:23:34,560 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 06:23:34,560 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 06:23:34,563 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:34,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:23:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 06:23:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 06:23:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 27 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 06:23:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-11-09 06:23:34,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 7 [2024-11-09 06:23:34,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:34,571 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-11-09 06:23:34,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 06:23:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-11-09 06:23:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:23:34,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:34,572 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:34,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 06:23:34,572 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:34,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:34,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1792298955, now seen corresponding path program 1 times [2024-11-09 06:23:34,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:34,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481231775] [2024-11-09 06:23:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:34,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:34,640 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 06:23:34,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:34,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481231775] [2024-11-09 06:23:34,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481231775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:34,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:34,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:23:34,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890962562] [2024-11-09 06:23:34,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:34,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:23:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:23:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:23:34,645 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:23:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:34,675 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-09 06:23:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:23:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 06:23:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:34,676 INFO L225 Difference]: With dead ends: 29 [2024-11-09 06:23:34,676 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 06:23:34,677 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 06:23:34,677 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:34,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:23:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 06:23:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 06:23:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.434782608695652) internal successors, (33), 28 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 06:23:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-09 06:23:34,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 7 [2024-11-09 06:23:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:34,687 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-09 06:23:34,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:23:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-09 06:23:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 06:23:34,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:34,688 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:34,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:23:34,688 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:34,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash -274328798, now seen corresponding path program 1 times [2024-11-09 06:23:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202034945] [2024-11-09 06:23:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:34,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:34,836 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 06:23:34,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:34,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202034945] [2024-11-09 06:23:34,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202034945] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:34,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:34,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:23:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862914639] [2024-11-09 06:23:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:34,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:23:34,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:23:34,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:23:34,839 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 06:23:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:34,913 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-09 06:23:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:23:34,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-11-09 06:23:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:34,915 INFO L225 Difference]: With dead ends: 29 [2024-11-09 06:23:34,915 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 06:23:34,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:23:34,916 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:34,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 39 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:23:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 06:23:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-09 06:23:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 27 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 06:23:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-09 06:23:34,922 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2024-11-09 06:23:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:34,925 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-09 06:23:34,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 06:23:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-09 06:23:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 06:23:34,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:34,926 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:34,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 06:23:34,927 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:34,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash -274328797, now seen corresponding path program 1 times [2024-11-09 06:23:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:34,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59642271] [2024-11-09 06:23:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:35,178 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 06:23:35,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:35,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59642271] [2024-11-09 06:23:35,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59642271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:35,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:35,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:23:35,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250322578] [2024-11-09 06:23:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:35,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:23:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:23:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:23:35,181 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 06:23:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:35,262 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-09 06:23:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:23:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-11-09 06:23:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:35,263 INFO L225 Difference]: With dead ends: 32 [2024-11-09 06:23:35,263 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 06:23:35,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:23:35,264 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:35,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 06:23:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-11-09 06:23:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 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 06:23:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-09 06:23:35,268 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 8 [2024-11-09 06:23:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:35,268 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-09 06:23:35,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 06:23:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-09 06:23:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 06:23:35,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:35,269 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:35,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 06:23:35,270 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:35,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:35,270 INFO L85 PathProgramCache]: Analyzing trace with hash 597939375, now seen corresponding path program 1 times [2024-11-09 06:23:35,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:35,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109577045] [2024-11-09 06:23:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:35,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:35,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109577045] [2024-11-09 06:23:35,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109577045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433789725] [2024-11-09 06:23:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:35,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:35,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:35,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:23:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:35,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 06:23:35,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:35,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:35,672 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 19 treesize of output 15 [2024-11-09 06:23:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:35,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433789725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902716368] [2024-11-09 06:23:35,737 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 06:23:35,738 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:35,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:35,738 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:35,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:36,370 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:36,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [902716368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:36,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:36,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 4, 4] total 20 [2024-11-09 06:23:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32959909] [2024-11-09 06:23:36,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:36,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:23:36,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:23:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:23:36,889 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 06:23:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:37,095 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-09 06:23:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:23:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 06:23:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:37,096 INFO L225 Difference]: With dead ends: 31 [2024-11-09 06:23:37,096 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 06:23:37,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:23:37,097 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:37,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 06:23:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2024-11-09 06:23:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 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 06:23:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-09 06:23:37,100 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2024-11-09 06:23:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:37,100 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-09 06:23:37,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 06:23:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-09 06:23:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 06:23:37,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:37,102 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:37,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:23:37,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:37,306 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:37,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1169225657, now seen corresponding path program 1 times [2024-11-09 06:23:37,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:37,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392264141] [2024-11-09 06:23:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:37,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:37,396 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 06:23:37,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:37,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392264141] [2024-11-09 06:23:37,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392264141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:37,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:37,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:23:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184834747] [2024-11-09 06:23:37,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:37,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:23:37,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:23:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:23:37,399 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 06:23:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:37,478 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-09 06:23:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:23:37,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 06:23:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:37,479 INFO L225 Difference]: With dead ends: 25 [2024-11-09 06:23:37,479 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 06:23:37,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:23:37,480 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:37,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 53 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 06:23:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-09 06:23:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 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 06:23:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 06:23:37,487 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 12 [2024-11-09 06:23:37,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:37,487 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 06:23:37,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 06:23:37,487 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 06:23:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 06:23:37,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:37,488 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:37,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:23:37,490 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:37,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1169225656, now seen corresponding path program 1 times [2024-11-09 06:23:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:37,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013265294] [2024-11-09 06:23:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:38,052 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 06:23:38,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:38,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013265294] [2024-11-09 06:23:38,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013265294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:38,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:38,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:23:38,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747685530] [2024-11-09 06:23:38,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:38,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:23:38,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:23:38,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-09 06:23:38,055 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 06:23:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:38,201 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-09 06:23:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 06:23:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 06:23:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:38,202 INFO L225 Difference]: With dead ends: 27 [2024-11-09 06:23:38,202 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 06:23:38,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-09 06:23:38,203 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:38,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 06:23:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 06:23:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 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 06:23:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-09 06:23:38,206 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2024-11-09 06:23:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:38,206 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-09 06:23:38,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 06:23:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-09 06:23:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 06:23:38,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:38,207 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:38,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 06:23:38,207 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:38,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1168737083, now seen corresponding path program 1 times [2024-11-09 06:23:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454266892] [2024-11-09 06:23:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:38,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:38,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454266892] [2024-11-09 06:23:38,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454266892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:38,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:38,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 06:23:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144084935] [2024-11-09 06:23:38,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:38,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:23:38,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:23:38,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:23:38,392 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 06:23:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:38,460 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-09 06:23:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:23:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 06:23:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:38,461 INFO L225 Difference]: With dead ends: 37 [2024-11-09 06:23:38,461 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 06:23:38,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:23:38,462 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:38,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 06:23:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-09 06:23:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:23:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-09 06:23:38,467 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2024-11-09 06:23:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:38,467 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-09 06:23:38,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 06:23:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-09 06:23:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:23:38,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:38,468 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:38,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 06:23:38,468 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:38,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1886258253, now seen corresponding path program 1 times [2024-11-09 06:23:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164055447] [2024-11-09 06:23:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:38,602 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 06:23:38,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:38,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164055447] [2024-11-09 06:23:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164055447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:23:38,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:23:38,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:23:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099976730] [2024-11-09 06:23:38,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:23:38,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:23:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:23:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:23:38,604 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 06:23:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:38,629 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-11-09 06:23:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:23:38,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 06:23:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:38,630 INFO L225 Difference]: With dead ends: 34 [2024-11-09 06:23:38,630 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 06:23:38,630 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 06:23:38,631 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:38,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:23:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 06:23:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 06:23:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 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 06:23:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-11-09 06:23:38,634 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 13 [2024-11-09 06:23:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:38,638 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-11-09 06:23:38,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 06:23:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-11-09 06:23:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 06:23:38,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:38,638 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:38,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 06:23:38,639 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:38,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1750437560, now seen corresponding path program 1 times [2024-11-09 06:23:38,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:38,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90876386] [2024-11-09 06:23:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:38,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:38,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:38,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90876386] [2024-11-09 06:23:38,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90876386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:38,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091757562] [2024-11-09 06:23:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:38,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:38,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:38,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:38,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:23:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:38,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 06:23:38,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:39,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:39,218 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 06:23:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:39,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091757562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:39,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682022552] [2024-11-09 06:23:39,253 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:23:39,253 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:39,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:39,254 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:39,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:40,320 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:41,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1151#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_24| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_24| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_24|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_24|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_24|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_24|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))))' at error location [2024-11-09 06:23:41,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:41,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:41,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-09 06:23:41,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974253274] [2024-11-09 06:23:41,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:41,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 06:23:41,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 06:23:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=572, Unknown=3, NotChecked=0, Total=650 [2024-11-09 06:23:41,676 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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 06:23:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:41,843 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2024-11-09 06:23:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 06:23:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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) Word has length 15 [2024-11-09 06:23:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:41,845 INFO L225 Difference]: With dead ends: 45 [2024-11-09 06:23:41,845 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 06:23:41,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=618, Unknown=3, NotChecked=0, Total=702 [2024-11-09 06:23:41,847 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:41,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 94 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 06:23:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2024-11-09 06:23:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:23:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-09 06:23:41,855 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 15 [2024-11-09 06:23:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:41,855 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-09 06:23:41,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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 06:23:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-09 06:23:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 06:23:41,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:41,856 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:41,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:42,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:42,058 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:42,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:42,059 INFO L85 PathProgramCache]: Analyzing trace with hash -216749161, now seen corresponding path program 1 times [2024-11-09 06:23:42,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:42,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841881075] [2024-11-09 06:23:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:42,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:42,841 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 06:23:42,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841881075] [2024-11-09 06:23:42,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841881075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328392128] [2024-11-09 06:23:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:42,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:42,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:42,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:23:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:42,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-09 06:23:42,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:42,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:23:42,956 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 06:23:42,965 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 06:23:43,579 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 06:23:43,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:44,348 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 06:23:44,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328392128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990514897] [2024-11-09 06:23:44,350 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 06:23:44,351 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:44,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:44,351 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:44,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:45,058 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:47,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1363#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~us~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (+ (select |#length| |ULTIMATE.start_cstrncpy_~us~0#1.base|) 1) |ULTIMATE.start_cstrncpy_~us~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (not (= 0 (+ |ULTIMATE.start_cstrncpy_~n2~0#1| 1))) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_cstrncpy_~src~0#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncpy_~us~0#1.offset|))' at error location [2024-11-09 06:23:47,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:47,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:47,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2024-11-09 06:23:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653046389] [2024-11-09 06:23:47,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:47,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 06:23:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 06:23:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:23:47,311 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 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 06:23:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:48,440 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2024-11-09 06:23:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 06:23:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 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 06:23:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:48,442 INFO L225 Difference]: With dead ends: 75 [2024-11-09 06:23:48,442 INFO L226 Difference]: Without dead ends: 75 [2024-11-09 06:23:48,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=344, Invalid=3316, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 06:23:48,444 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:48,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 110 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:23:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-09 06:23:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2024-11-09 06:23:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.263157894736842) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 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 06:23:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-11-09 06:23:48,448 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 15 [2024-11-09 06:23:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:48,449 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-11-09 06:23:48,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 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 06:23:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-11-09 06:23:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 06:23:48,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:48,450 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:48,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:48,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:23:48,654 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:48,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1571010477, now seen corresponding path program 1 times [2024-11-09 06:23:48,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:48,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427012422] [2024-11-09 06:23:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:48,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:23:49,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427012422] [2024-11-09 06:23:49,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427012422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:49,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832196488] [2024-11-09 06:23:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:49,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:49,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:49,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:49,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:23:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:49,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 06:23:49,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:49,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:23:49,210 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 06:23:49,215 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 10 treesize of output 8 [2024-11-09 06:23:49,470 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 06:23:49,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:49,714 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 06:23:49,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832196488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:49,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627689036] [2024-11-09 06:23:49,720 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:23:49,721 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:49,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:49,721 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:49,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:50,687 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:51,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1650#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post3#1.base_36| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_36| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_36| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_36| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_36|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_36|) (= (select |#valid| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_36|) 1) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_36|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_36|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_36|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_36|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_36|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_36|)) (<= (+ |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_36| 1) (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_36|)))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:23:51,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:51,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:51,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-09 06:23:51,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347577571] [2024-11-09 06:23:51,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:51,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:23:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:23:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=759, Unknown=5, NotChecked=0, Total=870 [2024-11-09 06:23:51,908 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 06:23:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:52,141 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2024-11-09 06:23:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:23:52,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) Word has length 16 [2024-11-09 06:23:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:52,142 INFO L225 Difference]: With dead ends: 59 [2024-11-09 06:23:52,142 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 06:23:52,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=149, Invalid=968, Unknown=5, NotChecked=0, Total=1122 [2024-11-09 06:23:52,143 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:52,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:23:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 06:23:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-09 06:23:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 58 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 06:23:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-11-09 06:23:52,147 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 16 [2024-11-09 06:23:52,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:52,147 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-11-09 06:23:52,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 06:23:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-11-09 06:23:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 06:23:52,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:52,148 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:52,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:52,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:23:52,349 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:52,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash -260387761, now seen corresponding path program 2 times [2024-11-09 06:23:52,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:52,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474362692] [2024-11-09 06:23:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:52,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:53,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:53,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474362692] [2024-11-09 06:23:53,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474362692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:53,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130304599] [2024-11-09 06:23:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:23:53,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:53,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:53,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:23:53,178 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:23:53,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:23:53,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 06:23:53,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:53,192 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 06:23:53,302 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 13 treesize of output 9 [2024-11-09 06:23:53,356 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 06:23:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:53,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:53,391 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_201 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_201) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2024-11-09 06:23:53,402 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_201 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_201) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:23:53,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:23:53,426 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 06:23:53,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:23:53,435 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 06:23:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-09 06:23:53,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130304599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:53,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613953807] [2024-11-09 06:23:53,541 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:23:53,541 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:53,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:53,541 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:53,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:54,446 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:55,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1923#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_48| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_48| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_48|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_48|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_48|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_48|))))' at error location [2024-11-09 06:23:55,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:55,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:55,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2024-11-09 06:23:55,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230529854] [2024-11-09 06:23:55,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:55,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:23:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:23:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=839, Unknown=6, NotChecked=118, Total=1056 [2024-11-09 06:23:55,628 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:23:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:56,042 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2024-11-09 06:23:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:23:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) Word has length 20 [2024-11-09 06:23:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:56,043 INFO L225 Difference]: With dead ends: 95 [2024-11-09 06:23:56,044 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 06:23:56,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=1264, Unknown=6, NotChecked=146, Total=1560 [2024-11-09 06:23:56,045 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:56,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 187 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2024-11-09 06:23:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 06:23:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 74. [2024-11-09 06:23:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 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 06:23:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2024-11-09 06:23:56,048 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 20 [2024-11-09 06:23:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:56,049 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2024-11-09 06:23:56,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:23:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2024-11-09 06:23:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 06:23:56,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:56,050 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 06:23:56,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:23:56,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:23:56,251 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:56,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash -476082734, now seen corresponding path program 3 times [2024-11-09 06:23:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:56,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87937981] [2024-11-09 06:23:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:56,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:56,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87937981] [2024-11-09 06:23:56,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87937981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:56,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071258576] [2024-11-09 06:23:56,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:23:56,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:56,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:56,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:56,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:23:56,685 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:23:56,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:23:56,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 06:23:56,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:56,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:57,010 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 06:23:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:23:57,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071258576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:57,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707612959] [2024-11-09 06:23:57,105 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:23:57,105 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:57,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:57,105 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:57,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:57,906 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:59,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2270#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_59| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_59| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_59|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_59|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_59|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_59|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:23:59,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:59,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:59,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-11-09 06:23:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015325881] [2024-11-09 06:23:59,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:59,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:23:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:23:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=839, Unknown=4, NotChecked=0, Total=930 [2024-11-09 06:23:59,114 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 21 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 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 06:23:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:59,562 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2024-11-09 06:23:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 06:23:59,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 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 23 [2024-11-09 06:23:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:59,563 INFO L225 Difference]: With dead ends: 106 [2024-11-09 06:23:59,563 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 06:23:59,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=128, Invalid=1200, Unknown=4, NotChecked=0, Total=1332 [2024-11-09 06:23:59,565 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:59,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 285 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:23:59,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 06:23:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2024-11-09 06:23:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 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 06:23:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2024-11-09 06:23:59,575 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 23 [2024-11-09 06:23:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:59,576 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2024-11-09 06:23:59,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 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 06:23:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2024-11-09 06:23:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 06:23:59,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:59,577 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:59,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:23:59,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:59,778 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:23:59,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1986295721, now seen corresponding path program 2 times [2024-11-09 06:23:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:59,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441013787] [2024-11-09 06:23:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:59,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:01,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:01,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441013787] [2024-11-09 06:24:01,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441013787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:01,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470901120] [2024-11-09 06:24:01,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:24:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:01,170 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:01,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:24:01,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:24:01,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:01,308 WARN L253 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-09 06:24:01,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:01,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:24:01,337 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 06:24:01,355 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-09 06:24:01,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 21 treesize of output 13 [2024-11-09 06:24:01,548 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 06:24:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:02,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:04,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470901120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:04,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294957365] [2024-11-09 06:24:04,240 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 06:24:04,240 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:04,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:04,241 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:04,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:04,686 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:06,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2687#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~us~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (+ (select |#length| |ULTIMATE.start_cstrncpy_~us~0#1.base|) 1) |ULTIMATE.start_cstrncpy_~us~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (not (= 0 (+ |ULTIMATE.start_cstrncpy_~n2~0#1| 1))) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_cstrncpy_~src~0#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncpy_~us~0#1.offset|))' at error location [2024-11-09 06:24:06,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:06,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:06,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19] total 57 [2024-11-09 06:24:06,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902156513] [2024-11-09 06:24:06,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:06,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 06:24:06,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 06:24:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=4329, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 06:24:06,925 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 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 06:24:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:10,590 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2024-11-09 06:24:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 06:24:10,591 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 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 27 [2024-11-09 06:24:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:10,591 INFO L225 Difference]: With dead ends: 109 [2024-11-09 06:24:10,591 INFO L226 Difference]: Without dead ends: 81 [2024-11-09 06:24:10,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=928, Invalid=9374, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 06:24:10,595 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:10,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 131 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:24:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-09 06:24:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-11-09 06:24:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 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 06:24:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2024-11-09 06:24:10,598 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2024-11-09 06:24:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:10,599 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2024-11-09 06:24:10,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 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 06:24:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2024-11-09 06:24:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 06:24:10,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:10,600 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 06:24:10,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:24:10,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:10,804 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:10,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1999374843, now seen corresponding path program 4 times [2024-11-09 06:24:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:10,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134598757] [2024-11-09 06:24:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:10,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:11,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:11,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134598757] [2024-11-09 06:24:11,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134598757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:11,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461324912] [2024-11-09 06:24:11,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:24:11,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:11,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:11,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:11,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:24:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:11,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-09 06:24:11,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:11,494 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 18 treesize of output 16 [2024-11-09 06:24:11,563 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 13 treesize of output 9 [2024-11-09 06:24:11,614 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 18 treesize of output 13 [2024-11-09 06:24:11,642 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 06:24:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:11,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:11,673 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_305 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_305) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2024-11-09 06:24:11,730 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_304 (Array Int Int)) (v_ArrVal_305 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_304) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_305) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:24:11,742 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_305 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_305) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:24:11,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:24:11,754 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 06:24:11,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:24:11,763 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 06:24:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2024-11-09 06:24:11,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461324912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:11,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248566469] [2024-11-09 06:24:11,868 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:24:11,869 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:11,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:11,869 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:11,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:12,657 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:13,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3136#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_77| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_77| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_77|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_77|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_77|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_77|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))))' at error location [2024-11-09 06:24:13,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:13,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:13,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 22 [2024-11-09 06:24:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169082636] [2024-11-09 06:24:13,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:13,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:24:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:24:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=779, Unknown=11, NotChecked=174, Total=1056 [2024-11-09 06:24:13,906 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 06:24:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:14,186 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2024-11-09 06:24:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:24:14,187 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) Word has length 28 [2024-11-09 06:24:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:14,187 INFO L225 Difference]: With dead ends: 117 [2024-11-09 06:24:14,187 INFO L226 Difference]: Without dead ends: 117 [2024-11-09 06:24:14,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=835, Unknown=11, NotChecked=180, Total=1122 [2024-11-09 06:24:14,188 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:14,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 273 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 348 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2024-11-09 06:24:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-09 06:24:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2024-11-09 06:24:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.134020618556701) internal successors, (110), 98 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 06:24:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2024-11-09 06:24:14,193 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 28 [2024-11-09 06:24:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:14,193 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2024-11-09 06:24:14,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 06:24:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2024-11-09 06:24:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 06:24:14,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:14,194 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:24:14,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:24:14,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:14,399 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:14,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash 437471661, now seen corresponding path program 1 times [2024-11-09 06:24:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814261503] [2024-11-09 06:24:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:24:15,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:15,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814261503] [2024-11-09 06:24:15,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814261503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:15,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159383974] [2024-11-09 06:24:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:15,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:15,533 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:15,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:24:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:15,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-09 06:24:15,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:15,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:24:15,664 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 06:24:15,668 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 06:24:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:24:16,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:24:17,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159383974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:17,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979526090] [2024-11-09 06:24:17,851 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 06:24:17,851 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:17,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:17,852 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:17,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:18,793 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:21,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3587#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_86| Int) (|v_#memory_int_136| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_82| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_86| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.base_85| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~us~0#1.base|) (= |#memory_int| (store |v_#memory_int_136| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_85| (store (select |v_#memory_int_136| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_85|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_82| 0))) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (+ |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_86| 1) (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_86|)) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (= (select |#valid| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_85|) 1) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_86|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_86|) (= (select |#valid| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_86|) 1) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= (select (select |v_#memory_int_136| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_86|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_86|) 0) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_82|) (<= (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_82| 1) (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_85|)) (<= 2 |ULTIMATE.start_cstrncpy_~us~0#1.offset|) (<= 0 (+ |ULTIMATE.start_cstrncpy_~n2~0#1| 1)) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_85|))) (<= (+ (select |#length| |ULTIMATE.start_cstrncpy_~us~0#1.base|) 1) |ULTIMATE.start_cstrncpy_~us~0#1.offset|) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (not (= 0 (+ |ULTIMATE.start_cstrncpy_~n2~0#1| 1))))' at error location [2024-11-09 06:24:21,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:21,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:21,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 49 [2024-11-09 06:24:21,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830390559] [2024-11-09 06:24:21,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:21,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 06:24:21,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:21,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 06:24:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=3704, Unknown=7, NotChecked=0, Total=4032 [2024-11-09 06:24:21,133 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 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 06:24:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:22,679 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2024-11-09 06:24:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 06:24:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 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 29 [2024-11-09 06:24:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:22,680 INFO L225 Difference]: With dead ends: 101 [2024-11-09 06:24:22,680 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:24:22,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=607, Invalid=6358, Unknown=7, NotChecked=0, Total=6972 [2024-11-09 06:24:22,682 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:22,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:24:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:24:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2024-11-09 06:24:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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 06:24:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-11-09 06:24:22,685 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2024-11-09 06:24:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:22,686 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-11-09 06:24:22,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 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 06:24:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-11-09 06:24:22,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 06:24:22,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:22,687 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-09 06:24:22,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:24:22,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:22,891 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:22,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:22,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1901296504, now seen corresponding path program 5 times [2024-11-09 06:24:22,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:22,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679040975] [2024-11-09 06:24:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:22,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:23,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679040975] [2024-11-09 06:24:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679040975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314438209] [2024-11-09 06:24:23,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:24:23,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:23,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:23,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:23,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:24:23,425 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:24:23,425 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:23,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 06:24:23,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:23,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:23,958 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 06:24:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:24,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314438209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:24,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [164898645] [2024-11-09 06:24:24,040 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:24:24,040 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:24,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:24,041 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:24,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:24,869 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:26,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3980#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_99| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_100| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_99|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_100|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_100|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_99|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))))' at error location [2024-11-09 06:24:26,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:26,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:26,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-09 06:24:26,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905713416] [2024-11-09 06:24:26,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:26,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 06:24:26,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 06:24:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1198, Unknown=3, NotChecked=0, Total=1332 [2024-11-09 06:24:26,075 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 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 06:24:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:26,353 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-11-09 06:24:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 06:24:26,353 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 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) Word has length 31 [2024-11-09 06:24:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:26,354 INFO L225 Difference]: With dead ends: 37 [2024-11-09 06:24:26,354 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 06:24:26,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=169, Invalid=1468, Unknown=3, NotChecked=0, Total=1640 [2024-11-09 06:24:26,355 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:26,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:24:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 06:24:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 06:24:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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 06:24:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-11-09 06:24:26,358 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2024-11-09 06:24:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:26,358 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-11-09 06:24:26,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 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 06:24:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-11-09 06:24:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 06:24:26,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:26,359 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-09 06:24:26,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:24:26,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:26,564 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:26,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:26,564 INFO L85 PathProgramCache]: Analyzing trace with hash -469581553, now seen corresponding path program 6 times [2024-11-09 06:24:26,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:26,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920867788] [2024-11-09 06:24:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:26,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:27,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:27,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920867788] [2024-11-09 06:24:27,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920867788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:27,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84546821] [2024-11-09 06:24:27,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:24:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:27,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:27,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:24:27,515 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:24:27,516 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:27,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-09 06:24:27,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:27,792 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 06:24:27,909 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 23 treesize of output 11 [2024-11-09 06:24:28,040 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 23 treesize of output 11 [2024-11-09 06:24:28,169 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 23 treesize of output 11 [2024-11-09 06:24:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:28,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:29,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39146 treesize of output 38378 [2024-11-09 06:24:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:29,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84546821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [479407715] [2024-11-09 06:24:29,886 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:24:29,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:29,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:29,886 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:29,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:30,565 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:32,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4328#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_115| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_116| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_115|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_115|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_116|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_116|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:24:32,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:32,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:32,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 45 [2024-11-09 06:24:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680438375] [2024-11-09 06:24:32,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:32,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 06:24:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 06:24:32,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2905, Unknown=4, NotChecked=0, Total=3080 [2024-11-09 06:24:32,164 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 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 06:24:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:33,388 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-11-09 06:24:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:24:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 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 36 [2024-11-09 06:24:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:33,389 INFO L225 Difference]: With dead ends: 64 [2024-11-09 06:24:33,389 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 06:24:33,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=294, Invalid=4958, Unknown=4, NotChecked=0, Total=5256 [2024-11-09 06:24:33,391 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:33,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 230 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:24:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 06:24:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-11-09 06:24:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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 06:24:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-09 06:24:33,393 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2024-11-09 06:24:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:33,394 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-09 06:24:33,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 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 06:24:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-09 06:24:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 06:24:33,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:33,395 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 06:24:33,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:24:33,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 06:24:33,600 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:33,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:33,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1718754450, now seen corresponding path program 7 times [2024-11-09 06:24:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:33,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118814315] [2024-11-09 06:24:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:33,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:34,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:34,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118814315] [2024-11-09 06:24:34,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118814315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:34,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125588881] [2024-11-09 06:24:34,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:24:34,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:34,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:34,116 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:34,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:24:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:34,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 06:24:34,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:34,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:34,762 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 06:24:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:34,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125588881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:34,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328563029] [2024-11-09 06:24:34,866 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:24:34,866 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:34,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:34,867 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:34,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:35,570 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:36,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4731#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_132| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_130| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_130|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_132|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_132|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_130|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:24:36,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:36,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:36,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2024-11-09 06:24:36,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915860732] [2024-11-09 06:24:36,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:36,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 06:24:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 06:24:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1209, Unknown=5, NotChecked=0, Total=1332 [2024-11-09 06:24:36,770 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 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 06:24:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:37,240 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-11-09 06:24:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 06:24:37,241 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 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 39 [2024-11-09 06:24:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:37,241 INFO L225 Difference]: With dead ends: 45 [2024-11-09 06:24:37,241 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 06:24:37,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=1488, Unknown=5, NotChecked=0, Total=1640 [2024-11-09 06:24:37,242 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:37,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 144 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:24:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 06:24:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-09 06:24:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 06:24:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-09 06:24:37,244 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2024-11-09 06:24:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:37,244 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-09 06:24:37,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 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 06:24:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-09 06:24:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 06:24:37,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:37,246 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 06:24:37,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:24:37,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:37,450 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:37,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:37,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1861443771, now seen corresponding path program 8 times [2024-11-09 06:24:37,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:37,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228853608] [2024-11-09 06:24:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:37,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:38,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:38,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228853608] [2024-11-09 06:24:38,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228853608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:38,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046231707] [2024-11-09 06:24:38,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:24:38,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:38,514 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:38,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:24:38,735 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:24:38,736 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:38,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-09 06:24:38,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:38,751 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 06:24:39,136 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 06:24:39,261 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 06:24:39,417 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 06:24:39,579 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 06:24:39,713 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 06:24:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:39,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:39,836 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_522) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))) is different from false [2024-11-09 06:24:39,847 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:24:39,950 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2024-11-09 06:24:42,150 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_519 (Array Int Int)) (v_ArrVal_522 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_519) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:24:42,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:24:42,237 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 06:24:42,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:24:42,246 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 06:24:42,253 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 06:24:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 35 not checked. [2024-11-09 06:24:42,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046231707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1193020729] [2024-11-09 06:24:42,386 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:24:42,386 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:42,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:42,387 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:42,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:43,183 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:44,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5148#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_148| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_150| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_148|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_150|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_148|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_150|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:24:44,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:44,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:44,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 50 [2024-11-09 06:24:44,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868497864] [2024-11-09 06:24:44,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:44,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 06:24:44,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 06:24:44,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2951, Unknown=65, NotChecked=452, Total=3660 [2024-11-09 06:24:44,708 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 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 06:24:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:45,557 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2024-11-09 06:24:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 06:24:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 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 44 [2024-11-09 06:24:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:45,558 INFO L225 Difference]: With dead ends: 77 [2024-11-09 06:24:45,559 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 06:24:45,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=238, Invalid=3745, Unknown=65, NotChecked=508, Total=4556 [2024-11-09 06:24:45,560 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:45,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 221 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 738 Invalid, 0 Unknown, 188 Unchecked, 0.4s Time] [2024-11-09 06:24:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 06:24:45,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-11-09 06:24:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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 06:24:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-09 06:24:45,562 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2024-11-09 06:24:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:45,563 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-09 06:24:45,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 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 06:24:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-09 06:24:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 06:24:45,564 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:45,564 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 06:24:45,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 06:24:45,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 06:24:45,766 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:45,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:45,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1727383496, now seen corresponding path program 9 times [2024-11-09 06:24:45,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:45,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018345892] [2024-11-09 06:24:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:45,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:46,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018345892] [2024-11-09 06:24:46,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018345892] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315008288] [2024-11-09 06:24:46,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:24:46,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:46,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:46,345 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:46,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:24:46,584 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:24:46,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:46,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 06:24:46,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:46,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:47,196 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 06:24:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:47,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315008288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:47,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760656054] [2024-11-09 06:24:47,411 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:24:47,411 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:47,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:47,412 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:47,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:48,012 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:49,442 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5613#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_165| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_167| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_165|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_167|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_165|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_167|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:24:49,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:49,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:49,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2024-11-09 06:24:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123123342] [2024-11-09 06:24:49,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:49,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 06:24:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 06:24:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1877, Unknown=3, NotChecked=0, Total=2070 [2024-11-09 06:24:49,445 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 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 06:24:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:49,936 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2024-11-09 06:24:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 06:24:49,937 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 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) Word has length 47 [2024-11-09 06:24:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:49,937 INFO L225 Difference]: With dead ends: 53 [2024-11-09 06:24:49,937 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 06:24:49,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=250, Invalid=2503, Unknown=3, NotChecked=0, Total=2756 [2024-11-09 06:24:49,938 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:49,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 179 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:24:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 06:24:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-09 06:24:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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 06:24:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-11-09 06:24:49,941 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2024-11-09 06:24:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:49,941 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-11-09 06:24:49,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 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 06:24:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-11-09 06:24:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 06:24:49,942 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:49,942 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 06:24:49,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:24:50,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 06:24:50,143 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:50,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1824422449, now seen corresponding path program 10 times [2024-11-09 06:24:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:50,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519045861] [2024-11-09 06:24:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 18 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:51,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:51,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519045861] [2024-11-09 06:24:51,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519045861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:51,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593536894] [2024-11-09 06:24:51,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:24:51,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:51,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:51,513 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:51,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:24:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:51,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-09 06:24:51,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:51,659 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 06:24:51,757 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 13 treesize of output 9 [2024-11-09 06:24:51,812 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 18 treesize of output 13 [2024-11-09 06:24:51,872 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 18 treesize of output 13 [2024-11-09 06:24:51,930 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 18 treesize of output 13 [2024-11-09 06:24:51,989 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 18 treesize of output 13 [2024-11-09 06:24:52,014 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 06:24:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 18 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:52,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:52,162 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_638 (Array Int Int)) (v_ArrVal_637 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_637) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_638) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:24:52,373 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_635 (Array Int Int)) (v_ArrVal_638 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_635) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_638) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:24:52,382 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_638 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_638) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:24:52,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:24:52,542 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 06:24:52,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:24:52,552 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 06:24:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 18 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 33 not checked. [2024-11-09 06:24:52,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593536894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:52,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321706198] [2024-11-09 06:24:52,765 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:24:52,766 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:52,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:52,766 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:52,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:53,338 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:55,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6094#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_185| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_185|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_185|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187|))))' at error location [2024-11-09 06:24:55,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:55,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:55,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 22] total 44 [2024-11-09 06:24:55,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822979556] [2024-11-09 06:24:55,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:55,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 06:24:55,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:55,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 06:24:55,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2413, Unknown=80, NotChecked=306, Total=2970 [2024-11-09 06:24:55,101 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 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 06:24:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:56,103 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2024-11-09 06:24:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 06:24:56,103 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 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) Word has length 52 [2024-11-09 06:24:56,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:56,104 INFO L225 Difference]: With dead ends: 90 [2024-11-09 06:24:56,104 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 06:24:56,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=216, Invalid=3255, Unknown=81, NotChecked=354, Total=3906 [2024-11-09 06:24:56,105 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:56,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 278 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 990 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2024-11-09 06:24:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 06:24:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-11-09 06:24:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 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 06:24:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-11-09 06:24:56,108 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2024-11-09 06:24:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:56,108 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-11-09 06:24:56,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 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 06:24:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-11-09 06:24:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 06:24:56,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:56,109 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-11-09 06:24:56,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 06:24:56,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 06:24:56,310 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:24:56,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash 8878930, now seen corresponding path program 11 times [2024-11-09 06:24:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893853719] [2024-11-09 06:24:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 22 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:56,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893853719] [2024-11-09 06:24:56,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893853719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789577902] [2024-11-09 06:24:56,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:24:56,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:56,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:56,963 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:56,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:24:57,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 06:24:57,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:57,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 06:24:57,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 40 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:57,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:57,877 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 06:24:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 40 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:24:57,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789577902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:57,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376840824] [2024-11-09 06:24:57,945 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:24:57,945 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:57,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:57,945 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:57,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:58,510 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:59,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6629#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_204| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_207| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_204|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_204|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_207|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_207|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:24:59,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:59,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:59,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2024-11-09 06:24:59,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733412512] [2024-11-09 06:24:59,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:59,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 06:24:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 06:24:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1835, Unknown=3, NotChecked=0, Total=2070 [2024-11-09 06:24:59,902 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 36 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 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 06:25:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:00,434 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-11-09 06:25:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 06:25:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 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) Word has length 55 [2024-11-09 06:25:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:00,435 INFO L225 Difference]: With dead ends: 61 [2024-11-09 06:25:00,435 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 06:25:00,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 128 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=321, Invalid=2432, Unknown=3, NotChecked=0, Total=2756 [2024-11-09 06:25:00,436 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:00,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 204 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:25:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 06:25:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-09 06:25:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 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 06:25:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-09 06:25:00,438 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2024-11-09 06:25:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:00,439 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-09 06:25:00,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 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 06:25:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-09 06:25:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 06:25:00,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:00,440 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2024-11-09 06:25:00,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:25:00,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 06:25:00,641 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:25:00,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1421576059, now seen corresponding path program 12 times [2024-11-09 06:25:00,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:00,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560974577] [2024-11-09 06:25:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:00,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:02,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:02,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560974577] [2024-11-09 06:25:02,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560974577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:02,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529246935] [2024-11-09 06:25:02,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:25:02,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:02,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:02,308 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:02,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:25:02,794 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:25:02,795 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:25:02,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-09 06:25:02,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:02,811 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 06:25:03,234 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 13 treesize of output 9 [2024-11-09 06:25:03,344 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 18 treesize of output 13 [2024-11-09 06:25:03,425 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 18 treesize of output 13 [2024-11-09 06:25:03,503 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 18 treesize of output 13 [2024-11-09 06:25:03,576 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 18 treesize of output 13 [2024-11-09 06:25:03,656 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 18 treesize of output 13 [2024-11-09 06:25:03,678 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 06:25:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:03,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:03,701 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_770 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2024-11-09 06:25:03,901 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_770 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:03,914 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_768 (Array Int Int)) (v_ArrVal_770 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_768) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:03,922 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_770 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:03,938 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int)) (v_ArrVal_770 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:03,948 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_770 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:03,961 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_766 (Array Int Int)) (v_ArrVal_770 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_766) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:03,971 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_770 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:04,089 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_770 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:04,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:25:04,098 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 06:25:04,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:25:04,106 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 06:25:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 94 not checked. [2024-11-09 06:25:04,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529246935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:04,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983418117] [2024-11-09 06:25:04,299 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:25:04,300 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:04,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:04,300 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:04,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:04,840 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:06,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7190#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_226| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_229| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_226|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_229|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_226|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_229|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:25:06,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:06,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:06,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25, 25] total 60 [2024-11-09 06:25:06,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004460878] [2024-11-09 06:25:06,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:06,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 06:25:06,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:06,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 06:25:06,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3554, Unknown=71, NotChecked=1152, Total=4970 [2024-11-09 06:25:06,865 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 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 06:25:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:11,239 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2024-11-09 06:25:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 06:25:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 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) Word has length 60 [2024-11-09 06:25:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:11,240 INFO L225 Difference]: With dead ends: 103 [2024-11-09 06:25:11,240 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 06:25:11,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=302, Invalid=6138, Unknown=76, NotChecked=1494, Total=8010 [2024-11-09 06:25:11,242 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:11,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 548 Invalid, 2370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1797 Invalid, 0 Unknown, 567 Unchecked, 1.0s Time] [2024-11-09 06:25:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 06:25:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-11-09 06:25:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 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 06:25:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2024-11-09 06:25:11,244 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2024-11-09 06:25:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:11,244 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2024-11-09 06:25:11,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 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 06:25:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2024-11-09 06:25:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 06:25:11,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:11,245 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2024-11-09 06:25:11,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 06:25:11,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:11,445 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:25:11,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:11,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1623866120, now seen corresponding path program 13 times [2024-11-09 06:25:11,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:11,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019023313] [2024-11-09 06:25:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:11,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 35 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:12,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:12,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019023313] [2024-11-09 06:25:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019023313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:12,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484556127] [2024-11-09 06:25:12,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:25:12,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:12,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:12,331 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:12,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 06:25:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:12,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-09 06:25:12,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 51 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:12,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:13,395 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 06:25:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 51 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484556127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:13,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1624435951] [2024-11-09 06:25:13,588 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:25:13,588 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:13,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:13,588 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:13,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:14,175 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:15,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7825#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_251| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_247| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_247|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_251|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_247|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_251|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:25:15,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:15,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 37 [2024-11-09 06:25:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647895839] [2024-11-09 06:25:15,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:15,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 06:25:15,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:15,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 06:25:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2144, Unknown=3, NotChecked=0, Total=2352 [2024-11-09 06:25:15,614 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 39 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 38 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:25:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:16,234 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2024-11-09 06:25:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 06:25:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 38 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:25:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:16,235 INFO L225 Difference]: With dead ends: 69 [2024-11-09 06:25:16,235 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 06:25:16,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 150 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=267, Invalid=2810, Unknown=3, NotChecked=0, Total=3080 [2024-11-09 06:25:16,236 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:16,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 209 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:25:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 06:25:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-09 06:25:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 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 06:25:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-11-09 06:25:16,238 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 63 [2024-11-09 06:25:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:16,239 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-11-09 06:25:16,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 38 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:25:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-11-09 06:25:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 06:25:16,240 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:16,240 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2024-11-09 06:25:16,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 06:25:16,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:16,444 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:25:16,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1215502991, now seen corresponding path program 14 times [2024-11-09 06:25:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:16,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913803418] [2024-11-09 06:25:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:16,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 24 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:18,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913803418] [2024-11-09 06:25:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913803418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322657936] [2024-11-09 06:25:18,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:25:18,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:18,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:18,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:18,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 06:25:19,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:25:19,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:25:19,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-09 06:25:19,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:19,143 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 06:25:19,777 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 06:25:19,923 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 06:25:20,095 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 06:25:20,248 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 06:25:20,398 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 06:25:20,557 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 06:25:20,722 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 06:25:20,874 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 06:25:21,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 06:25:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 24 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:21,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:21,033 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_919 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2024-11-09 06:25:21,047 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_919 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:25:21,196 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_919 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:21,316 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_919 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:21,461 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_919 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:21,471 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_915 (Array Int Int)) (v_ArrVal_919 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_915) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:21,480 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_919 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:21,776 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_913 (Array Int Int)) (v_ArrVal_919 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_913) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:21,785 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_919 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_919) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:21,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:25:21,794 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 06:25:21,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:25:21,801 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 06:25:21,803 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 06:25:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 24 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 115 not checked. [2024-11-09 06:25:22,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322657936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:22,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828274192] [2024-11-09 06:25:22,403 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:25:22,403 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:22,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:22,404 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:22,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:23,061 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:25,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8475#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_275| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_271| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_275|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_271|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_275|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_271|))))' at error location [2024-11-09 06:25:25,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:25,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:25,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 85 [2024-11-09 06:25:25,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077182175] [2024-11-09 06:25:25,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:25,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 06:25:25,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:25,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 06:25:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=7108, Unknown=115, NotChecked=1602, Total=9120 [2024-11-09 06:25:25,103 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 86 states, 86 states have (on average 2.2093023255813953) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 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 06:25:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:27,514 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2024-11-09 06:25:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 06:25:27,514 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2093023255813953) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 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 68 [2024-11-09 06:25:27,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:27,515 INFO L225 Difference]: With dead ends: 116 [2024-11-09 06:25:27,515 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 06:25:27,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 3095 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=385, Invalid=9436, Unknown=115, NotChecked=1836, Total=11772 [2024-11-09 06:25:27,517 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:27,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 682 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2306 Invalid, 0 Unknown, 637 Unchecked, 1.2s Time] [2024-11-09 06:25:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 06:25:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-11-09 06:25:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 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 06:25:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-11-09 06:25:27,520 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2024-11-09 06:25:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:27,520 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-11-09 06:25:27,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2093023255813953) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 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 06:25:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-11-09 06:25:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 06:25:27,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:27,521 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2024-11-09 06:25:27,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 06:25:27,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:27,722 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:25:27,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1679534610, now seen corresponding path program 15 times [2024-11-09 06:25:27,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:27,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162793903] [2024-11-09 06:25:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 51 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:28,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:28,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162793903] [2024-11-09 06:25:28,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162793903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:28,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656400185] [2024-11-09 06:25:28,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:25:28,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:28,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:28,814 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:28,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 06:25:29,379 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:25:29,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:25:29,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-09 06:25:29,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:29,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:30,384 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 06:25:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:30,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656400185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677990554] [2024-11-09 06:25:30,845 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:25:30,845 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:30,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:30,846 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:30,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:31,397 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:33,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9179#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_298| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_294| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_294|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_298|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_294|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_298|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:25:33,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:33,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:33,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2024-11-09 06:25:33,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825731084] [2024-11-09 06:25:33,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:33,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 06:25:33,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:33,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 06:25:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=3363, Unknown=3, NotChecked=0, Total=3660 [2024-11-09 06:25:33,224 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 51 states, 50 states have (on average 3.46) internal successors, (173), 50 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 06:25:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:34,600 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2024-11-09 06:25:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 06:25:34,601 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.46) internal successors, (173), 50 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 71 [2024-11-09 06:25:34,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:34,601 INFO L225 Difference]: With dead ends: 77 [2024-11-09 06:25:34,601 INFO L226 Difference]: Without dead ends: 77 [2024-11-09 06:25:34,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=542, Invalid=5617, Unknown=3, NotChecked=0, Total=6162 [2024-11-09 06:25:34,602 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:34,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 431 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:25:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-09 06:25:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-09 06:25:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 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 06:25:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2024-11-09 06:25:34,605 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2024-11-09 06:25:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:34,606 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2024-11-09 06:25:34,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.46) internal successors, (173), 50 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 06:25:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2024-11-09 06:25:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-09 06:25:34,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:34,607 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2024-11-09 06:25:34,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 06:25:34,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:34,807 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:25:34,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:34,808 INFO L85 PathProgramCache]: Analyzing trace with hash 717193669, now seen corresponding path program 16 times [2024-11-09 06:25:34,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:34,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425993625] [2024-11-09 06:25:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:34,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 27 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:37,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:37,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425993625] [2024-11-09 06:25:37,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425993625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:37,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519160978] [2024-11-09 06:25:37,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:25:37,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:37,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:37,317 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:37,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 06:25:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:37,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-09 06:25:37,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:37,536 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 10 treesize of output 8 [2024-11-09 06:25:37,677 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 13 treesize of output 9 [2024-11-09 06:25:37,747 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 18 treesize of output 13 [2024-11-09 06:25:37,825 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 18 treesize of output 13 [2024-11-09 06:25:37,898 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 18 treesize of output 13 [2024-11-09 06:25:37,985 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 18 treesize of output 13 [2024-11-09 06:25:38,065 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 18 treesize of output 13 [2024-11-09 06:25:38,149 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 18 treesize of output 13 [2024-11-09 06:25:38,232 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 18 treesize of output 13 [2024-11-09 06:25:38,257 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 06:25:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 27 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:38,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:38,375 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:25:38,577 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1086 (Array Int Int)) (v_ArrVal_1084 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1084) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,585 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,595 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1086 (Array Int Int)) (v_ArrVal_1083 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1083) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,604 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,617 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1082 (Array Int Int)) (v_ArrVal_1086 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1082) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,718 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1081 (Array Int Int)) (v_ArrVal_1086 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1081) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,727 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,738 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1080 (Array Int Int)) (v_ArrVal_1086 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1080) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,746 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,759 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1079 (Array Int Int)) (v_ArrVal_1086 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1079) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1086) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:38,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:25:38,860 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 06:25:38,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:25:38,867 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 06:25:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 27 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 156 not checked. [2024-11-09 06:25:39,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519160978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:39,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1800016825] [2024-11-09 06:25:39,071 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:25:39,071 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:39,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:39,072 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:39,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:39,712 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:41,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9894#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_320| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_324| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_320|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_320|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_324|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_324|))))' at error location [2024-11-09 06:25:41,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:41,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:41,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 64 [2024-11-09 06:25:41,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291956909] [2024-11-09 06:25:41,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:41,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 06:25:41,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:41,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 06:25:41,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3791, Unknown=68, NotChecked=1474, Total=5550 [2024-11-09 06:25:41,543 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 65 states, 65 states have (on average 2.246153846153846) internal successors, (146), 64 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 06:25:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:43,829 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2024-11-09 06:25:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 06:25:43,829 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.246153846153846) internal successors, (146), 64 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) Word has length 76 [2024-11-09 06:25:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:43,830 INFO L225 Difference]: With dead ends: 129 [2024-11-09 06:25:43,830 INFO L226 Difference]: Without dead ends: 82 [2024-11-09 06:25:43,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 191 SyntacticMatches, 11 SemanticMatches, 86 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=284, Invalid=5544, Unknown=68, NotChecked=1760, Total=7656 [2024-11-09 06:25:43,831 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 870 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:43,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 624 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2024 Invalid, 0 Unknown, 870 Unchecked, 1.1s Time] [2024-11-09 06:25:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-09 06:25:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-11-09 06:25:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 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 06:25:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2024-11-09 06:25:43,833 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2024-11-09 06:25:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:43,833 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2024-11-09 06:25:43,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.246153846153846) internal successors, (146), 64 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 06:25:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2024-11-09 06:25:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 06:25:43,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:43,834 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2024-11-09 06:25:43,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 06:25:44,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 06:25:44,035 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:25:44,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash 929947208, now seen corresponding path program 17 times [2024-11-09 06:25:44,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:44,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890688529] [2024-11-09 06:25:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:44,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 70 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:45,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890688529] [2024-11-09 06:25:45,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890688529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057445638] [2024-11-09 06:25:45,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:25:45,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:45,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:45,251 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:45,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 06:25:46,201 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 06:25:46,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:25:46,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-09 06:25:46,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 100 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:46,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:47,573 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 06:25:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 100 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:47,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057445638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928677159] [2024-11-09 06:25:47,827 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:25:47,827 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:47,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:47,827 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:47,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:48,397 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:50,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10675#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_350| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_345| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_350|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_345|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_350|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_345|))))' at error location [2024-11-09 06:25:50,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:50,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:50,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2024-11-09 06:25:50,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732489130] [2024-11-09 06:25:50,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:50,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-09 06:25:50,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:50,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-09 06:25:50,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=3928, Unknown=3, NotChecked=0, Total=4422 [2024-11-09 06:25:50,108 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 56 states have internal predecessors, (206), 0 states have call successors, (0), 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 06:25:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:51,082 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2024-11-09 06:25:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 06:25:51,083 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 56 states have internal predecessors, (206), 0 states have call successors, (0), 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 79 [2024-11-09 06:25:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:51,083 INFO L225 Difference]: With dead ends: 85 [2024-11-09 06:25:51,084 INFO L226 Difference]: Without dead ends: 85 [2024-11-09 06:25:51,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 182 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=661, Invalid=5188, Unknown=3, NotChecked=0, Total=5852 [2024-11-09 06:25:51,084 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:51,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 290 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:25:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-09 06:25:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-09 06:25:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 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 06:25:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2024-11-09 06:25:51,088 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2024-11-09 06:25:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:51,089 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2024-11-09 06:25:51,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 56 states have internal predecessors, (206), 0 states have call successors, (0), 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 06:25:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2024-11-09 06:25:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 06:25:51,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:51,090 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2024-11-09 06:25:51,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 06:25:51,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 06:25:51,290 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:25:51,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1294762161, now seen corresponding path program 18 times [2024-11-09 06:25:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:51,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209377771] [2024-11-09 06:25:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:51,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 30 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:53,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209377771] [2024-11-09 06:25:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209377771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:53,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769602040] [2024-11-09 06:25:53,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:25:53,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:53,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:53,897 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:53,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 06:25:54,675 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:25:54,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:25:54,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-11-09 06:25:54,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:54,692 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 18 treesize of output 16 [2024-11-09 06:25:55,375 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 06:25:55,513 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 06:25:55,661 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 06:25:55,806 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 06:25:55,949 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 06:25:56,094 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 06:25:56,239 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 06:25:56,388 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 06:25:56,555 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 06:25:56,725 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 06:25:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 30 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:56,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:57,389 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:57,564 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:57,576 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int)) (v_ArrVal_1266 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1266) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:59,733 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int)) (v_ArrVal_1265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:59,904 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int)) (v_ArrVal_1264 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1264) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:59,915 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:59,927 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int)) (v_ArrVal_1263 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1263) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:59,937 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:59,949 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int)) (v_ArrVal_1262 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1262) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:25:59,960 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:01,976 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int)) (v_ArrVal_1261 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1261) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:02,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:26:02,139 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 06:26:02,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:26:02,147 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 06:26:02,156 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 06:26:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 30 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 183 not checked. [2024-11-09 06:26:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769602040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:02,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875459068] [2024-11-09 06:26:02,456 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:26:02,456 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:02,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:02,457 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:02,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:03,070 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:26:05,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11469#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_373| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_378| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_378|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_373|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_378|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_373|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:26:05,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:26:05,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:05,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 34, 34] total 95 [2024-11-09 06:26:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115077701] [2024-11-09 06:26:05,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:05,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-09 06:26:05,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:05,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-09 06:26:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=8493, Unknown=145, NotChecked=2156, Total=11130 [2024-11-09 06:26:05,853 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 96 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 95 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 06:26:09,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:09,242 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2024-11-09 06:26:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 06:26:09,243 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 95 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) Word has length 84 [2024-11-09 06:26:09,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:09,243 INFO L225 Difference]: With dead ends: 142 [2024-11-09 06:26:09,243 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 06:26:09,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 189 SyntacticMatches, 11 SemanticMatches, 121 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 3953 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=445, Invalid=11886, Unknown=145, NotChecked=2530, Total=15006 [2024-11-09 06:26:09,245 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 958 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:09,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 895 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2822 Invalid, 0 Unknown, 958 Unchecked, 1.6s Time] [2024-11-09 06:26:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 06:26:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2024-11-09 06:26:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 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 06:26:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2024-11-09 06:26:09,249 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2024-11-09 06:26:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:09,249 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2024-11-09 06:26:09,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 95 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 06:26:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2024-11-09 06:26:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 06:26:09,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:09,251 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 06:26:09,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 06:26:09,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 06:26:09,451 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:26:09,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1469404974, now seen corresponding path program 19 times [2024-11-09 06:26:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:09,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338787721] [2024-11-09 06:26:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 92 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:10,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:10,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338787721] [2024-11-09 06:26:10,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338787721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729877134] [2024-11-09 06:26:10,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:26:10,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:10,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:10,838 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:10,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 06:26:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:11,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-09 06:26:11,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 117 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:11,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:12,169 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 06:26:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 117 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:12,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729877134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:12,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092338701] [2024-11-09 06:26:12,317 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:26:12,317 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:12,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:12,317 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:12,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:12,893 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:26:14,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12311#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_400| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_406| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_400|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_406|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_400|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_406|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:26:14,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:26:14,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:14,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 39 [2024-11-09 06:26:14,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896231956] [2024-11-09 06:26:14,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:14,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 06:26:14,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 06:26:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2330, Unknown=3, NotChecked=0, Total=2550 [2024-11-09 06:26:14,645 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 41 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 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 06:26:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:15,648 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2024-11-09 06:26:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 06:26:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 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 06:26:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:15,649 INFO L225 Difference]: With dead ends: 93 [2024-11-09 06:26:15,649 INFO L226 Difference]: Without dead ends: 93 [2024-11-09 06:26:15,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 223 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=311, Invalid=3346, Unknown=3, NotChecked=0, Total=3660 [2024-11-09 06:26:15,650 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:15,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 393 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:26:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-09 06:26:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-09 06:26:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 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 06:26:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2024-11-09 06:26:15,653 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 87 [2024-11-09 06:26:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:15,654 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2024-11-09 06:26:15,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 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 06:26:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2024-11-09 06:26:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 06:26:15,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:15,655 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 06:26:15,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:15,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 06:26:15,856 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:26:15,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash 499235589, now seen corresponding path program 20 times [2024-11-09 06:26:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:15,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462786602] [2024-11-09 06:26:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:15,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 33 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:18,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462786602] [2024-11-09 06:26:18,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462786602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443277540] [2024-11-09 06:26:18,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:26:18,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:18,754 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:18,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 06:26:21,377 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:26:21,377 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:21,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-11-09 06:26:21,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:21,402 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 06:26:22,451 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 06:26:22,629 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 06:26:22,808 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 06:26:23,002 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 06:26:23,199 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 06:26:23,416 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 06:26:23,616 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 06:26:23,829 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 06:26:24,062 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 06:26:24,304 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 06:26:24,567 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 06:26:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 33 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:24,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:25,301 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1470 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:27,676 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1467 (Array Int Int)) (v_ArrVal_1470 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1467) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:28,049 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1470 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:28,248 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1470 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:28,260 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1464 (Array Int Int)) (v_ArrVal_1470 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1464) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:30,445 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1463 (Array Int Int)) (v_ArrVal_1470 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1463) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:30,458 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1470 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:32,472 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1462 (Array Int Int)) (v_ArrVal_1470 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1462) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:32,484 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1470 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:34,499 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int)) (v_ArrVal_1470 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:34,513 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1470 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1470) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:26:34,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:26:34,523 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 06:26:34,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:26:34,533 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 06:26:34,541 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 06:26:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 33 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 210 not checked. [2024-11-09 06:26:34,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443277540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:34,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581549551] [2024-11-09 06:26:34,865 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:26:34,865 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:34,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:34,866 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:34,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:35,524 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:26:38,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13178#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_430| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_436| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_430|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_436|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_436|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_430|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:26:38,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:26:38,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:38,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 37, 37] total 104 [2024-11-09 06:26:38,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185463820] [2024-11-09 06:26:38,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:38,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-09 06:26:38,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-09 06:26:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=10147, Unknown=239, NotChecked=2354, Total=13110 [2024-11-09 06:26:38,474 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 105 states, 105 states have (on average 2.219047619047619) internal successors, (233), 104 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 06:26:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:43,509 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2024-11-09 06:26:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-09 06:26:43,510 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.219047619047619) internal successors, (233), 104 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 92 [2024-11-09 06:26:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:43,511 INFO L225 Difference]: With dead ends: 155 [2024-11-09 06:26:43,511 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 06:26:43,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 208 SyntacticMatches, 11 SemanticMatches, 132 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 4674 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=494, Invalid=14317, Unknown=239, NotChecked=2772, Total=17822 [2024-11-09 06:26:43,512 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 3645 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 4701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1045 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:43,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1063 Invalid, 4701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3645 Invalid, 0 Unknown, 1045 Unchecked, 2.5s Time] [2024-11-09 06:26:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 06:26:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-11-09 06:26:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 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 06:26:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2024-11-09 06:26:43,515 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2024-11-09 06:26:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:43,516 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2024-11-09 06:26:43,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.219047619047619) internal successors, (233), 104 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 06:26:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2024-11-09 06:26:43,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 06:26:43,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:43,518 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2024-11-09 06:26:43,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:43,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:43,719 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:26:43,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1629794696, now seen corresponding path program 21 times [2024-11-09 06:26:43,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:43,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152090525] [2024-11-09 06:26:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:43,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 117 proven. 367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:45,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:45,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152090525] [2024-11-09 06:26:45,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152090525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:45,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341539844] [2024-11-09 06:26:45,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:26:45,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:45,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:45,144 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:45,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 06:26:45,928 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:26:45,929 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:45,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-09 06:26:45,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 145 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:46,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:47,621 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 06:26:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 145 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:48,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341539844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:48,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115539852] [2024-11-09 06:26:48,295 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:26:48,295 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:48,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:48,296 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:48,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:48,849 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:26:50,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14118#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_465| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_459| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_459|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_465|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_465|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_459|))))' at error location [2024-11-09 06:26:50,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:26:50,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:50,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 64 [2024-11-09 06:26:50,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731976089] [2024-11-09 06:26:50,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:50,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-09 06:26:50,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-09 06:26:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=5120, Unknown=3, NotChecked=0, Total=5700 [2024-11-09 06:26:50,740 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 66 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 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 06:26:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:52,215 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2024-11-09 06:26:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 06:26:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 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 95 [2024-11-09 06:26:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:52,216 INFO L225 Difference]: With dead ends: 101 [2024-11-09 06:26:52,216 INFO L226 Difference]: Without dead ends: 101 [2024-11-09 06:26:52,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2226 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=730, Invalid=7099, Unknown=3, NotChecked=0, Total=7832 [2024-11-09 06:26:52,217 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:52,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 594 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:26:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-09 06:26:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-09 06:26:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 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 06:26:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2024-11-09 06:26:52,220 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 95 [2024-11-09 06:26:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:52,221 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2024-11-09 06:26:52,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.5384615384615383) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 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 06:26:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2024-11-09 06:26:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-09 06:26:52,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:52,222 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2024-11-09 06:26:52,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:52,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:52,423 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:26:52,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1499548657, now seen corresponding path program 22 times [2024-11-09 06:26:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:52,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049324795] [2024-11-09 06:26:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 36 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:56,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:56,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049324795] [2024-11-09 06:26:56,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049324795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:56,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030784488] [2024-11-09 06:26:56,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:26:56,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:56,008 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:56,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 06:26:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:56,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-11-09 06:26:56,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:56,343 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 06:26:57,401 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 13 treesize of output 9 [2024-11-09 06:26:57,582 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 18 treesize of output 13 [2024-11-09 06:26:57,694 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 18 treesize of output 13 [2024-11-09 06:26:57,809 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 18 treesize of output 13 [2024-11-09 06:26:57,911 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 18 treesize of output 13 [2024-11-09 06:26:58,012 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 18 treesize of output 13 [2024-11-09 06:26:58,129 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 18 treesize of output 13 [2024-11-09 06:26:58,254 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 18 treesize of output 13 [2024-11-09 06:26:58,368 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 18 treesize of output 13 [2024-11-09 06:26:58,482 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 18 treesize of output 13 [2024-11-09 06:26:58,599 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 18 treesize of output 13 [2024-11-09 06:26:58,625 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 06:26:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 36 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:58,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:58,650 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2024-11-09 06:26:58,938 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:59,233 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int)) (v_ArrVal_1685 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:59,382 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int)) (v_ArrVal_1684 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1684) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:59,681 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:59,703 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int)) (v_ArrVal_1682 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1682) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:59,711 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:26:59,874 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:00,269 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:00,335 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1679 (Array Int Int)) (v_ArrVal_1688 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1679) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:00,500 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1678 (Array Int Int)) (v_ArrVal_1688 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1678) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:27:00,511 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 11)) 0)) is different from false [2024-11-09 06:27:00,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:27:00,521 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 06:27:00,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:27:00,528 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 06:27:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 36 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 249 not checked. [2024-11-09 06:27:00,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030784488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:00,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983346425] [2024-11-09 06:27:00,839 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:27:00,839 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:00,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:27:00,839 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:27:00,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:27:01,371 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:27:04,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15051#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_497| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_491| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_491|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_497|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_491|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_497|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:27:04,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:27:04,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:04,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 40, 40] total 100 [2024-11-09 06:27:04,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906103717] [2024-11-09 06:27:04,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:04,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-09 06:27:04,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-09 06:27:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=9146, Unknown=281, NotChecked=2460, Total=12210 [2024-11-09 06:27:04,708 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 101 states, 101 states have (on average 2.267326732673267) internal successors, (229), 100 states have internal predecessors, (229), 0 states have call successors, (0), 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 06:27:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:18,461 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2024-11-09 06:27:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-09 06:27:18,462 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.267326732673267) internal successors, (229), 100 states have internal predecessors, (229), 0 states have call successors, (0), 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 100 [2024-11-09 06:27:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:18,463 INFO L225 Difference]: With dead ends: 168 [2024-11-09 06:27:18,463 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 06:27:18,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 240 SyntacticMatches, 12 SemanticMatches, 143 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=519, Invalid=16774, Unknown=311, NotChecked=3276, Total=20880 [2024-11-09 06:27:18,465 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 4522 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 5770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1237 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:18,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1318 Invalid, 5770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4522 Invalid, 0 Unknown, 1237 Unchecked, 3.3s Time] [2024-11-09 06:27:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 06:27:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2024-11-09 06:27:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 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 06:27:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2024-11-09 06:27:18,470 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2024-11-09 06:27:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:18,470 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2024-11-09 06:27:18,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.267326732673267) internal successors, (229), 100 states have internal predecessors, (229), 0 states have call successors, (0), 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 06:27:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2024-11-09 06:27:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 06:27:18,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:18,471 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2024-11-09 06:27:18,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-09 06:27:18,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 06:27:18,672 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:27:18,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash 162559890, now seen corresponding path program 23 times [2024-11-09 06:27:18,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:18,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783701665] [2024-11-09 06:27:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:18,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 145 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:27:20,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:20,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783701665] [2024-11-09 06:27:20,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783701665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:20,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499607656] [2024-11-09 06:27:20,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:27:20,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:20,158 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:20,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 06:27:22,867 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-09 06:27:22,867 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:27:22,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-09 06:27:22,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 187 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:27:23,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:25,049 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 06:27:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 187 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:27:25,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499607656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:25,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062976550] [2024-11-09 06:27:25,270 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:27:25,270 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:25,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:27:25,270 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:27:25,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:27:25,943 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:27:27,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16085#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_522| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_529| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_522|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_529|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_522|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_529|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:27:27,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:27:27,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:27,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 58 [2024-11-09 06:27:27,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423776199] [2024-11-09 06:27:27,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:27,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-09 06:27:27,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-09 06:27:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=4205, Unknown=3, NotChecked=0, Total=4830 [2024-11-09 06:27:27,897 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 60 states, 59 states have (on average 3.983050847457627) internal successors, (235), 59 states have internal predecessors, (235), 0 states have call successors, (0), 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 06:27:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:29,570 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2024-11-09 06:27:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 06:27:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.983050847457627) internal successors, (235), 59 states have internal predecessors, (235), 0 states have call successors, (0), 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 103 [2024-11-09 06:27:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:29,572 INFO L225 Difference]: With dead ends: 109 [2024-11-09 06:27:29,572 INFO L226 Difference]: Without dead ends: 109 [2024-11-09 06:27:29,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 254 SyntacticMatches, 13 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=873, Invalid=5930, Unknown=3, NotChecked=0, Total=6806 [2024-11-09 06:27:29,576 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:29,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 425 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:27:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-09 06:27:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-09 06:27:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 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 06:27:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2024-11-09 06:27:29,580 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 103 [2024-11-09 06:27:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:29,580 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2024-11-09 06:27:29,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.983050847457627) internal successors, (235), 59 states have internal predecessors, (235), 0 states have call successors, (0), 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 06:27:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2024-11-09 06:27:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 06:27:29,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:29,581 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2024-11-09 06:27:29,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 06:27:29,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-09 06:27:29,782 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:27:29,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1919998907, now seen corresponding path program 24 times [2024-11-09 06:27:29,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:29,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292369702] [2024-11-09 06:27:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:29,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 39 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:27:33,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292369702] [2024-11-09 06:27:33,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292369702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132826808] [2024-11-09 06:27:33,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:27:33,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:33,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:33,501 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:33,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 06:27:35,997 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:27:35,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:27:36,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 269 conjuncts are in the unsatisfiable core [2024-11-09 06:27:36,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:36,023 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 06:27:37,418 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 06:27:37,633 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 06:27:37,862 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 06:27:38,082 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 06:27:38,278 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 06:27:38,478 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 06:27:38,687 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 06:27:38,942 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 06:27:39,172 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 06:27:39,416 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 06:27:39,660 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 06:27:39,908 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 06:27:40,149 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 06:27:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 39 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:27:40,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:40,366 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2024-11-09 06:27:40,375 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:27:40,766 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int)) (v_ArrVal_1920 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1920) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:40,776 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:40,984 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:41,347 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int)) (v_ArrVal_1917 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1917) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:41,512 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int)) (v_ArrVal_1916 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1916) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:41,850 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:41,860 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int)) (v_ArrVal_1914 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1914) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:42,026 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int)) (v_ArrVal_1913 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1913) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:27:42,035 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:27:42,217 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1922 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_1922) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 11)) 0)) is different from false [2024-11-09 06:27:42,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:27:42,587 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 06:27:42,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:27:42,597 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 37 treesize of output 32 [2024-11-09 06:27:42,601 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 06:27:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 39 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 285 not checked. [2024-11-09 06:27:42,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132826808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:42,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295644856] [2024-11-09 06:27:42,980 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:27:42,980 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:42,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:27:42,980 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:27:42,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:27:43,604 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:27:46,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17103#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_556| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_563| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_563|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_556|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_563|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_556|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:27:46,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:27:46,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:46,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 43, 43] total 121 [2024-11-09 06:27:46,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532668084] [2024-11-09 06:27:46,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:46,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-11-09 06:27:46,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:46,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-11-09 06:27:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=13546, Unknown=355, NotChecked=2964, Total=17292 [2024-11-09 06:27:46,945 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 122 states, 122 states have (on average 2.2540983606557377) internal successors, (275), 121 states have internal predecessors, (275), 0 states have call successors, (0), 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 06:27:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:54,074 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2024-11-09 06:27:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-09 06:27:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.2540983606557377) internal successors, (275), 121 states have internal predecessors, (275), 0 states have call successors, (0), 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 108 [2024-11-09 06:27:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:54,076 INFO L225 Difference]: With dead ends: 181 [2024-11-09 06:27:54,076 INFO L226 Difference]: Without dead ends: 114 [2024-11-09 06:27:54,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 246 SyntacticMatches, 12 SemanticMatches, 152 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 6260 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=569, Invalid=19146, Unknown=355, NotChecked=3492, Total=23562 [2024-11-09 06:27:54,077 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 5165 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 6509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1332 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:54,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1447 Invalid, 6509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5165 Invalid, 0 Unknown, 1332 Unchecked, 3.7s Time] [2024-11-09 06:27:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-09 06:27:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-11-09 06:27:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:27:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2024-11-09 06:27:54,080 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2024-11-09 06:27:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:54,081 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2024-11-09 06:27:54,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.2540983606557377) internal successors, (275), 121 states have internal predecessors, (275), 0 states have call successors, (0), 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 06:27:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2024-11-09 06:27:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-09 06:27:54,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:54,082 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1] [2024-11-09 06:27:54,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 06:27:54,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-09 06:27:54,283 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:27:54,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1328723144, now seen corresponding path program 25 times [2024-11-09 06:27:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327371181] [2024-11-09 06:27:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:54,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 176 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:27:56,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:56,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327371181] [2024-11-09 06:27:56,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327371181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:56,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965254307] [2024-11-09 06:27:56,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:27:56,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:56,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:56,333 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:56,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 06:27:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:56,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-09 06:27:56,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 210 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:27:57,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:58,894 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 06:27:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 210 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:27:59,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965254307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:59,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647359705] [2024-11-09 06:27:59,479 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:27:59,479 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:59,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:27:59,480 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:27:59,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:28:00,135 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:28:02,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18185#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_589| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_597| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_589|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_597|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_589|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_597|))))' at error location [2024-11-09 06:28:02,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:28:02,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:28:02,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 61 [2024-11-09 06:28:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457544453] [2024-11-09 06:28:02,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:28:02,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-09 06:28:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:28:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-09 06:28:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=4766, Unknown=3, NotChecked=0, Total=5256 [2024-11-09 06:28:02,431 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 63 states, 62 states have (on average 3.629032258064516) internal successors, (225), 62 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:28:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:28:04,905 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2024-11-09 06:28:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 06:28:04,906 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.629032258064516) internal successors, (225), 62 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:28:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:28:04,906 INFO L225 Difference]: With dead ends: 117 [2024-11-09 06:28:04,907 INFO L226 Difference]: Without dead ends: 117 [2024-11-09 06:28:04,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 276 SyntacticMatches, 14 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=642, Invalid=6665, Unknown=3, NotChecked=0, Total=7310 [2024-11-09 06:28:04,908 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:28:04,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 664 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 06:28:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-09 06:28:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-09 06:28:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 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 06:28:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2024-11-09 06:28:04,912 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2024-11-09 06:28:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:28:04,913 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2024-11-09 06:28:04,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.629032258064516) internal successors, (225), 62 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:28:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2024-11-09 06:28:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-09 06:28:04,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:28:04,914 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2024-11-09 06:28:04,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 06:28:05,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-09 06:28:05,115 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:28:05,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:28:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash -586106673, now seen corresponding path program 26 times [2024-11-09 06:28:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:28:05,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187585104] [2024-11-09 06:28:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:28:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:28:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 42 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:28:10,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:28:10,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187585104] [2024-11-09 06:28:10,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187585104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:28:10,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440569489] [2024-11-09 06:28:10,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:28:10,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:10,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:28:10,002 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:28:10,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 06:28:13,944 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 06:28:13,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:28:13,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 288 conjuncts are in the unsatisfiable core [2024-11-09 06:28:13,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:28:13,985 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 06:28:15,721 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 06:28:15,973 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 06:28:16,241 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 06:28:16,514 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 06:28:16,785 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 06:28:17,052 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 06:28:17,347 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 06:28:17,620 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 06:28:17,898 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 06:28:18,177 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 06:28:18,459 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 06:28:18,732 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 06:28:19,017 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 06:28:19,305 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 06:28:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 42 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:28:19,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:28:20,653 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:22,671 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2170 (Array Int Int)) (v_ArrVal_2173 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2170) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:22,683 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:24,699 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2169 (Array Int Int)) (v_ArrVal_2173 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2169) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:24,712 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:24,725 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2168 (Array Int Int)) (v_ArrVal_2173 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2168) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:24,735 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:26,749 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2167 (Array Int Int)) (v_ArrVal_2173 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2167) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:29,409 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2165 (Array Int Int)) (v_ArrVal_2173 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2165) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:29,423 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:29,660 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:28:29,671 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2163 (Array Int Int)) (v_ArrVal_2173 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2163) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:28:29,681 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 11)) 0)) is different from false [2024-11-09 06:28:29,693 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2162 (Array Int Int)) (v_ArrVal_2173 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2162) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 11)))) is different from false [2024-11-09 06:28:29,703 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:29,715 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int)) (v_ArrVal_2161 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2161) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:29,724 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2173) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:28:29,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:28:29,735 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 06:28:29,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:28:29,743 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 06:28:29,746 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 06:28:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 42 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 390 not checked. [2024-11-09 06:28:30,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440569489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:28:30,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657414750] [2024-11-09 06:28:30,121 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:28:30,121 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:28:30,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:28:30,122 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:28:30,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:28:30,691 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:28:33,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19276#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_625| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_633| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_625|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_633|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_633|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_625|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))))' at error location [2024-11-09 06:28:33,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:28:33,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:28:33,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 46, 46] total 130 [2024-11-09 06:28:33,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735206096] [2024-11-09 06:28:33,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:28:33,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-09 06:28:33,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:28:33,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-09 06:28:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=14593, Unknown=283, NotChecked=4420, Total=19740 [2024-11-09 06:28:33,442 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 131 states, 131 states have (on average 2.2595419847328246) internal successors, (296), 130 states have internal predecessors, (296), 0 states have call successors, (0), 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 06:28:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:28:41,677 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2024-11-09 06:28:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-09 06:28:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.2595419847328246) internal successors, (296), 130 states have internal predecessors, (296), 0 states have call successors, (0), 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 116 [2024-11-09 06:28:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:28:41,678 INFO L225 Difference]: With dead ends: 194 [2024-11-09 06:28:41,678 INFO L226 Difference]: Without dead ends: 122 [2024-11-09 06:28:41,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 265 SyntacticMatches, 17 SemanticMatches, 163 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 7030 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=597, Invalid=20944, Unknown=283, NotChecked=5236, Total=27060 [2024-11-09 06:28:41,681 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 5763 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 7800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2023 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:28:41,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1608 Invalid, 7800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5763 Invalid, 0 Unknown, 2023 Unchecked, 4.1s Time] [2024-11-09 06:28:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-09 06:28:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2024-11-09 06:28:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 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 06:28:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2024-11-09 06:28:41,685 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2024-11-09 06:28:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:28:41,685 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2024-11-09 06:28:41,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.2595419847328246) internal successors, (296), 130 states have internal predecessors, (296), 0 states have call successors, (0), 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 06:28:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2024-11-09 06:28:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-09 06:28:41,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:28:41,687 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2024-11-09 06:28:41,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 06:28:41,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-09 06:28:41,888 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:28:41,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:28:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1456925102, now seen corresponding path program 27 times [2024-11-09 06:28:41,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:28:41,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740656536] [2024-11-09 06:28:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:28:41,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:28:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 210 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:28:44,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:28:44,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740656536] [2024-11-09 06:28:44,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740656536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:28:44,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680259294] [2024-11-09 06:28:44,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:28:44,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:44,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:28:44,140 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:28:44,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 06:28:47,089 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:28:47,090 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:28:47,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-09 06:28:47,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:28:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 247 proven. 537 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:28:48,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:28:49,904 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 06:28:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 247 proven. 537 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:28:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680259294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:28:51,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187590726] [2024-11-09 06:28:51,260 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:28:51,260 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:28:51,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:28:51,260 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:28:51,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:28:52,017 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:28:54,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20454#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_660| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_668| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_660|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_668|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_668|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_660|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))))' at error location [2024-11-09 06:28:54,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:28:54,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:28:54,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 79 [2024-11-09 06:28:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305397980] [2024-11-09 06:28:54,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:28:54,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-09 06:28:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:28:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-09 06:28:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=7506, Unknown=3, NotChecked=0, Total=8190 [2024-11-09 06:28:54,958 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 81 states, 80 states have (on average 3.5875) internal successors, (287), 80 states have internal predecessors, (287), 0 states have call successors, (0), 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 06:28:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:28:58,831 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2024-11-09 06:28:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 06:28:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 3.5875) internal successors, (287), 80 states have internal predecessors, (287), 0 states have call successors, (0), 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 119 [2024-11-09 06:28:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:28:58,832 INFO L225 Difference]: With dead ends: 125 [2024-11-09 06:28:58,832 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 06:28:58,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3411 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1316, Invalid=13201, Unknown=3, NotChecked=0, Total=14520 [2024-11-09 06:28:58,833 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 2781 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:28:58,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 870 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2781 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 06:28:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 06:28:58,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-09 06:28:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 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 06:28:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2024-11-09 06:28:58,836 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 119 [2024-11-09 06:28:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:28:58,836 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2024-11-09 06:28:58,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 3.5875) internal successors, (287), 80 states have internal predecessors, (287), 0 states have call successors, (0), 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 06:28:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2024-11-09 06:28:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 06:28:58,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:28:58,837 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2024-11-09 06:28:58,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-09 06:28:59,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-09 06:28:59,038 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:28:59,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:28:59,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1100235387, now seen corresponding path program 28 times [2024-11-09 06:28:59,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:28:59,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692837777] [2024-11-09 06:28:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:28:59,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:28:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:29:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 45 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:29:03,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:29:03,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692837777] [2024-11-09 06:29:03,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692837777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:29:03,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746569339] [2024-11-09 06:29:03,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:29:03,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:29:03,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:29:03,954 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:29:03,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 06:29:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:29:04,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 236 conjuncts are in the unsatisfiable core [2024-11-09 06:29:04,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:29:04,370 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 06:29:05,753 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 13 treesize of output 9 [2024-11-09 06:29:05,959 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 18 treesize of output 13 [2024-11-09 06:29:06,085 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 18 treesize of output 13 [2024-11-09 06:29:06,208 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 18 treesize of output 13 [2024-11-09 06:29:06,332 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 18 treesize of output 13 [2024-11-09 06:29:06,456 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 18 treesize of output 13 [2024-11-09 06:29:06,580 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 18 treesize of output 13 [2024-11-09 06:29:06,704 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 18 treesize of output 13 [2024-11-09 06:29:06,830 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 18 treesize of output 13 [2024-11-09 06:29:06,957 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 18 treesize of output 13 [2024-11-09 06:29:07,084 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 18 treesize of output 13 [2024-11-09 06:29:07,215 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 18 treesize of output 13 [2024-11-09 06:29:07,432 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 18 treesize of output 13 [2024-11-09 06:29:07,637 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 18 treesize of output 13 [2024-11-09 06:29:07,672 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 06:29:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 45 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:29:07,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:29:07,935 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:29:07,948 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int)) (v_ArrVal_2440 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2440) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:29:08,419 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:10,436 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2438 (Array Int Int)) (v_ArrVal_2441 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2438) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:10,448 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2024-11-09 06:29:10,460 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2437 (Array Int Int)) (v_ArrVal_2441 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2437) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:10,471 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:10,484 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2436 (Array Int Int)) (v_ArrVal_2441 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2436) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:12,746 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2435 (Array Int Int)) (v_ArrVal_2441 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2435) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:13,016 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2434 (Array Int Int)) (v_ArrVal_2441 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2434) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:13,265 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2433 (Array Int Int)) (v_ArrVal_2441 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2433) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:13,274 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:13,538 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:29:14,333 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:14,349 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2429 (Array Int Int)) (v_ArrVal_2441 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2429) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:14,363 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2441 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:14,376 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2428 (Array Int Int)) (v_ArrVal_2441 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2428) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2441) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:14,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:29:14,632 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 06:29:14,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:29:14,640 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 06:29:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 45 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 432 not checked. [2024-11-09 06:29:15,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746569339] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:29:15,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155936239] [2024-11-09 06:29:15,129 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:29:15,129 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:29:15,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:29:15,130 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:29:15,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:29:15,812 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:29:19,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21637#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_706| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_698| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_706|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_698|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_706|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_698|))))' at error location [2024-11-09 06:29:19,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:29:19,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:29:19,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 49, 49] total 124 [2024-11-09 06:29:19,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955909249] [2024-11-09 06:29:19,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:29:19,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2024-11-09 06:29:19,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:29:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2024-11-09 06:29:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=13156, Unknown=332, NotChecked=4216, Total=18090 [2024-11-09 06:29:19,635 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 125 states, 125 states have (on average 2.288) internal successors, (286), 124 states have internal predecessors, (286), 0 states have call successors, (0), 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 06:29:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:29:45,131 INFO L93 Difference]: Finished difference Result 207 states and 208 transitions. [2024-11-09 06:29:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-09 06:29:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.288) internal successors, (286), 124 states have internal predecessors, (286), 0 states have call successors, (0), 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 124 [2024-11-09 06:29:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:29:45,133 INFO L225 Difference]: With dead ends: 207 [2024-11-09 06:29:45,133 INFO L226 Difference]: Without dead ends: 130 [2024-11-09 06:29:45,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 300 SyntacticMatches, 17 SemanticMatches, 176 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 5400 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=630, Invalid=24831, Unknown=367, NotChecked=5678, Total=31506 [2024-11-09 06:29:45,136 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 6664 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 8838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 6664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2160 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:29:45,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1990 Invalid, 8838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 6664 Invalid, 0 Unknown, 2160 Unchecked, 4.7s Time] [2024-11-09 06:29:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-09 06:29:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2024-11-09 06:29:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:29:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2024-11-09 06:29:45,141 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2024-11-09 06:29:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:29:45,141 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2024-11-09 06:29:45,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.288) internal successors, (286), 124 states have internal predecessors, (286), 0 states have call successors, (0), 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 06:29:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2024-11-09 06:29:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 06:29:45,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:29:45,143 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2024-11-09 06:29:45,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-09 06:29:45,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-09 06:29:45,344 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:29:45,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:29:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1378097144, now seen corresponding path program 29 times [2024-11-09 06:29:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:29:45,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155288273] [2024-11-09 06:29:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:29:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:29:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:29:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 247 proven. 653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:29:47,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:29:47,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155288273] [2024-11-09 06:29:47,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155288273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:29:47,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639420577] [2024-11-09 06:29:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:29:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:29:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:29:47,792 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:29:47,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 06:29:57,967 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 06:29:57,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:29:57,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-09 06:29:57,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:29:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 301 proven. 599 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:29:59,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:30:01,785 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 06:30:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 301 proven. 599 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:30:02,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639420577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:30:02,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992613578] [2024-11-09 06:30:02,372 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:30:02,372 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:30:02,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:30:02,372 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:30:02,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:30:03,183 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:30:05,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22929#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_735| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_744| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_744|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_735|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_735|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_744|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|))))' at error location [2024-11-09 06:30:05,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:30:05,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:30:05,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 86 [2024-11-09 06:30:05,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843506693] [2024-11-09 06:30:05,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:30:05,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 06:30:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:30:05,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 06:30:05,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=8327, Unknown=3, NotChecked=0, Total=9506 [2024-11-09 06:30:05,459 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 88 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 87 states have internal predecessors, (333), 0 states have call successors, (0), 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 06:30:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:30:07,822 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2024-11-09 06:30:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 06:30:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 87 states have internal predecessors, (333), 0 states have call successors, (0), 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 127 [2024-11-09 06:30:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:30:07,823 INFO L225 Difference]: With dead ends: 133 [2024-11-09 06:30:07,823 INFO L226 Difference]: Without dead ends: 133 [2024-11-09 06:30:07,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 301 SyntacticMatches, 16 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1554, Invalid=11325, Unknown=3, NotChecked=0, Total=12882 [2024-11-09 06:30:07,824 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:30:07,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 763 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:30:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-09 06:30:07,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-09 06:30:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 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 06:30:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2024-11-09 06:30:07,827 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 127 [2024-11-09 06:30:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:30:07,828 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2024-11-09 06:30:07,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 87 states have internal predecessors, (333), 0 states have call successors, (0), 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 06:30:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2024-11-09 06:30:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-09 06:30:07,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:30:07,829 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2024-11-09 06:30:07,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-09 06:30:08,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:30:08,029 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:30:08,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:30:08,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1268413041, now seen corresponding path program 30 times [2024-11-09 06:30:08,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:30:08,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467954072] [2024-11-09 06:30:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:30:08,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:30:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:30:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 48 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:30:14,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:30:14,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467954072] [2024-11-09 06:30:14,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467954072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:30:14,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419740240] [2024-11-09 06:30:14,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:30:14,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:30:14,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:30:14,320 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:30:14,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 06:30:20,048 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:30:20,049 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:30:20,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 255 conjuncts are in the unsatisfiable core [2024-11-09 06:30:20,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:30:20,068 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 06:30:20,325 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 13 treesize of output 9 [2024-11-09 06:30:20,423 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 18 treesize of output 13 [2024-11-09 06:30:20,543 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 18 treesize of output 13 [2024-11-09 06:30:20,694 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 18 treesize of output 13 [2024-11-09 06:30:20,811 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 18 treesize of output 13 [2024-11-09 06:30:20,921 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 18 treesize of output 13 [2024-11-09 06:30:21,032 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 18 treesize of output 13 [2024-11-09 06:30:21,139 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 18 treesize of output 13 [2024-11-09 06:30:21,246 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 18 treesize of output 13 [2024-11-09 06:30:21,362 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 18 treesize of output 13 [2024-11-09 06:30:21,479 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 18 treesize of output 13 [2024-11-09 06:30:21,602 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 18 treesize of output 13 [2024-11-09 06:30:21,726 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 18 treesize of output 13 [2024-11-09 06:30:21,843 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 18 treesize of output 13 [2024-11-09 06:30:21,954 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 18 treesize of output 13 [2024-11-09 06:30:22,065 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 06:30:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 48 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:30:22,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:30:22,174 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2024-11-09 06:30:22,182 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:30:22,339 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:22,494 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2024-11-09 06:30:24,508 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2723 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2723) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:24,518 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:24,528 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2722 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2722) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:24,535 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:24,712 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:26,727 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2720 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2720) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:28,942 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2719 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2719) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:28,955 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:28,967 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2718 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2718) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2024-11-09 06:30:31,202 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2717 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:31,215 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:30:33,237 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2716 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2716) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:30:33,249 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 11)) 0)) is different from false [2024-11-09 06:30:33,476 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:33,489 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2714 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2714) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:33,499 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:33,511 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2713 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2713) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:33,521 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:35,536 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int)) (v_ArrVal_2712 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2712) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:35,549 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_2726) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 15 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:30:35,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:30:35,560 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 06:30:35,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:30:35,568 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 06:30:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 48 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 568 not checked. [2024-11-09 06:30:36,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419740240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:30:36,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875413048] [2024-11-09 06:30:36,015 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:30:36,015 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:30:36,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:30:36,016 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:30:36,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:30:36,783 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:30:39,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24139#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_775| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_784| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_775|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_784|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_775|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_784|))))' at error location [2024-11-09 06:30:39,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:30:39,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:30:39,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 52, 52] total 115 [2024-11-09 06:30:39,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377698506] [2024-11-09 06:30:39,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:30:39,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-11-09 06:30:39,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:30:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-11-09 06:30:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=9854, Unknown=180, NotChecked=5352, Total=15750 [2024-11-09 06:30:39,695 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 116 states, 116 states have (on average 2.2586206896551726) internal successors, (262), 115 states have internal predecessors, (262), 0 states have call successors, (0), 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 06:30:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:30:47,065 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2024-11-09 06:30:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-09 06:30:47,066 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.2586206896551726) internal successors, (262), 115 states have internal predecessors, (262), 0 states have call successors, (0), 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 132 [2024-11-09 06:30:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:30:47,066 INFO L225 Difference]: With dead ends: 220 [2024-11-09 06:30:47,066 INFO L226 Difference]: Without dead ends: 138 [2024-11-09 06:30:47,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 336 SyntacticMatches, 24 SemanticMatches, 152 ConstructedPredicates, 24 IntricatePredicates, 0 DeprecatedPredicates, 4127 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=511, Invalid=16171, Unknown=184, NotChecked=6696, Total=23562 [2024-11-09 06:30:47,069 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 5462 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 8716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 5462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3239 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:30:47,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1592 Invalid, 8716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 5462 Invalid, 0 Unknown, 3239 Unchecked, 3.2s Time] [2024-11-09 06:30:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-09 06:30:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2024-11-09 06:30:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 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 06:30:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2024-11-09 06:30:47,073 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2024-11-09 06:30:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:30:47,073 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2024-11-09 06:30:47,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.2586206896551726) internal successors, (262), 115 states have internal predecessors, (262), 0 states have call successors, (0), 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 06:30:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2024-11-09 06:30:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 06:30:47,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:30:47,074 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2024-11-09 06:30:47,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-09 06:30:47,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:30:47,275 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:30:47,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:30:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1292928274, now seen corresponding path program 31 times [2024-11-09 06:30:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:30:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863757981] [2024-11-09 06:30:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:30:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:30:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:30:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 287 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:30:49,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:30:49,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863757981] [2024-11-09 06:30:49,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863757981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:30:49,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234420549] [2024-11-09 06:30:49,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:30:49,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:30:49,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:30:49,766 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:30:49,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 06:30:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:30:50,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-09 06:30:50,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:30:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 330 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:30:51,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:30:52,734 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 06:30:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 330 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:30:53,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234420549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:30:53,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503959740] [2024-11-09 06:30:53,459 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:30:53,459 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:30:53,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:30:53,460 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:30:53,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:30:54,062 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:30:56,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25465#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_824| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_814| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_814|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_824|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_814|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_824|))))' at error location [2024-11-09 06:30:56,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:30:56,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:30:56,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 74 [2024-11-09 06:30:56,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2462333] [2024-11-09 06:30:56,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:30:56,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-09 06:30:56,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:30:56,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-09 06:30:56,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=6587, Unknown=4, NotChecked=0, Total=7310 [2024-11-09 06:30:56,258 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 76 states, 75 states have (on average 3.6533333333333333) internal successors, (274), 75 states have internal predecessors, (274), 0 states have call successors, (0), 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 06:30:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:30:58,875 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2024-11-09 06:30:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-09 06:30:58,876 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.6533333333333333) internal successors, (274), 75 states have internal predecessors, (274), 0 states have call successors, (0), 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 06:30:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:30:58,877 INFO L225 Difference]: With dead ends: 141 [2024-11-09 06:30:58,877 INFO L226 Difference]: Without dead ends: 141 [2024-11-09 06:30:58,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 338 SyntacticMatches, 17 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=957, Invalid=9545, Unknown=4, NotChecked=0, Total=10506 [2024-11-09 06:30:58,879 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 3450 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 3450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:30:58,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1138 Invalid, 3450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3450 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 06:30:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-09 06:30:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-11-09 06:30:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 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 06:30:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2024-11-09 06:30:58,882 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 135 [2024-11-09 06:30:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:30:58,883 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2024-11-09 06:30:58,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.6533333333333333) internal successors, (274), 75 states have internal predecessors, (274), 0 states have call successors, (0), 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 06:30:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2024-11-09 06:30:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 06:30:58,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:30:58,903 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2024-11-09 06:30:58,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-09 06:30:59,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-09 06:30:59,105 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:30:59,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:30:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1872463557, now seen corresponding path program 32 times [2024-11-09 06:30:59,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:30:59,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054253321] [2024-11-09 06:30:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:30:59,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:30:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:31:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 51 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:31:06,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:31:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054253321] [2024-11-09 06:31:06,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054253321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:31:06,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946502167] [2024-11-09 06:31:06,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:31:06,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:31:06,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:31:06,802 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:31:06,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-09 06:31:58,883 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 06:31:58,884 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:31:58,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 347 conjuncts are in the unsatisfiable core [2024-11-09 06:31:58,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:31:58,940 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 06:32:01,410 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 06:32:01,709 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 06:32:02,017 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 06:32:02,330 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 06:32:02,726 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 06:32:03,130 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 06:32:03,444 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 06:32:03,762 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 06:32:04,086 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 06:32:04,407 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 06:32:04,727 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 06:32:05,045 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 06:32:05,368 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 06:32:05,724 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 06:32:06,051 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 06:32:06,386 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 06:32:06,723 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 06:32:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 51 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:32:07,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:32:07,285 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:32:10,315 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3025 (Array Int Int)) (v_ArrVal_3028 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3025) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:10,866 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:11,730 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:13,744 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3021 (Array Int Int)) (v_ArrVal_3028 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3021) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:16,028 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3020 (Array Int Int)) (v_ArrVal_3028 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3020) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:16,041 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:16,053 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int)) (v_ArrVal_3019 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3019) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:16,064 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:32:16,950 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:16,962 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3016 (Array Int Int)) (v_ArrVal_3028 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3016) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:19,251 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3015 (Array Int Int)) (v_ArrVal_3028 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3015) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:19,265 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:19,277 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3014 (Array Int Int)) (v_ArrVal_3028 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3014) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:21,564 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3013 (Array Int Int)) (v_ArrVal_3028 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3013) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 15 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:21,578 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3028) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 16 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:32:21,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:32:21,589 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 06:32:21,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:32:21,599 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 06:32:21,603 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 06:32:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 51 proven. 565 refuted. 0 times theorem prover too weak. 0 trivial. 491 not checked. [2024-11-09 06:32:24,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946502167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:32:24,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539425297] [2024-11-09 06:32:24,478 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:32:24,478 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:32:24,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:32:24,478 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:32:24,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:32:25,162 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:32:29,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26801#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_856| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_866| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_866|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_856|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_856|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_866|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:32:29,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:32:29,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:32:29,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 55, 55] total 175 [2024-11-09 06:32:29,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146268984] [2024-11-09 06:32:29,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:32:29,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2024-11-09 06:32:29,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:32:29,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2024-11-09 06:32:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=27579, Unknown=589, NotChecked=5616, Total=34410 [2024-11-09 06:32:29,553 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 176 states, 176 states have (on average 2.3068181818181817) internal successors, (406), 175 states have internal predecessors, (406), 0 states have call successors, (0), 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 06:32:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:32:41,200 INFO L93 Difference]: Finished difference Result 233 states and 234 transitions. [2024-11-09 06:32:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-09 06:32:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.3068181818181817) internal successors, (406), 175 states have internal predecessors, (406), 0 states have call successors, (0), 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 140 [2024-11-09 06:32:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:32:41,202 INFO L225 Difference]: With dead ends: 233 [2024-11-09 06:32:41,202 INFO L226 Difference]: Without dead ends: 146 [2024-11-09 06:32:41,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 305 SyntacticMatches, 16 SemanticMatches, 215 ConstructedPredicates, 16 IntricatePredicates, 0 DeprecatedPredicates, 12977 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=844, Invalid=38831, Unknown=589, NotChecked=6608, Total=46872 [2024-11-09 06:32:41,207 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 2569 mSDsCounter, 0 mSdLazyCounter, 9017 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2604 SdHoareTripleChecker+Invalid, 11323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 9017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2289 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:32:41,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2604 Invalid, 11323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 9017 Invalid, 0 Unknown, 2289 Unchecked, 5.8s Time] [2024-11-09 06:32:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-09 06:32:41,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2024-11-09 06:32:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 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 06:32:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2024-11-09 06:32:41,211 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2024-11-09 06:32:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:32:41,212 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2024-11-09 06:32:41,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.3068181818181817) internal successors, (406), 175 states have internal predecessors, (406), 0 states have call successors, (0), 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 06:32:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2024-11-09 06:32:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-09 06:32:41,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:32:41,214 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1] [2024-11-09 06:32:41,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-09 06:32:41,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-09 06:32:41,415 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:32:41,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:32:41,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1536931000, now seen corresponding path program 33 times [2024-11-09 06:32:41,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:32:41,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908953172] [2024-11-09 06:32:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:32:41,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:32:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 330 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:32:44,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:32:44,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908953172] [2024-11-09 06:32:44,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908953172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:32:44,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140198980] [2024-11-09 06:32:44,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:32:44,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:32:44,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:32:44,499 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:32:44,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-09 06:32:55,255 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:32:55,255 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:32:55,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-11-09 06:32:55,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:32:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 376 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:32:57,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:32:58,979 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 06:33:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 376 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:33:00,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140198980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:33:00,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247917468] [2024-11-09 06:33:00,598 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:33:00,598 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:33:00,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:33:00,623 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:33:00,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:33:01,303 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:33:04,255 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28214#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_907| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_897| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_897|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_907|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_897|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_907|))))' at error location [2024-11-09 06:33:04,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:33:04,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:33:04,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 94 [2024-11-09 06:33:04,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380091292] [2024-11-09 06:33:04,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:33:04,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-09 06:33:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-09 06:33:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1285, Invalid=9841, Unknown=4, NotChecked=0, Total=11130 [2024-11-09 06:33:04,258 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 96 states, 95 states have (on average 3.6210526315789475) internal successors, (344), 95 states have internal predecessors, (344), 0 states have call successors, (0), 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 06:33:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:07,894 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2024-11-09 06:33:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-09 06:33:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 3.6210526315789475) internal successors, (344), 95 states have internal predecessors, (344), 0 states have call successors, (0), 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 143 [2024-11-09 06:33:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:07,896 INFO L225 Difference]: With dead ends: 149 [2024-11-09 06:33:07,896 INFO L226 Difference]: Without dead ends: 149 [2024-11-09 06:33:07,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5166 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1562, Invalid=13686, Unknown=4, NotChecked=0, Total=15252 [2024-11-09 06:33:07,898 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 3151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:07,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1044 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3151 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-09 06:33:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-09 06:33:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2024-11-09 06:33:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 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 06:33:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2024-11-09 06:33:07,903 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 143 [2024-11-09 06:33:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:07,904 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2024-11-09 06:33:07,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 3.6210526315789475) internal successors, (344), 95 states have internal predecessors, (344), 0 states have call successors, (0), 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 06:33:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2024-11-09 06:33:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-09 06:33:07,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:07,905 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2024-11-09 06:33:07,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-09 06:33:08,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:08,106 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:33:08,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash -270978481, now seen corresponding path program 34 times [2024-11-09 06:33:08,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:08,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515216492] [2024-11-09 06:33:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:08,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 54 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:33:16,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515216492] [2024-11-09 06:33:16,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515216492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:33:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333512313] [2024-11-09 06:33:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:33:16,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:33:16,786 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:33:16,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 06:33:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:17,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 281 conjuncts are in the unsatisfiable core [2024-11-09 06:33:17,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:17,221 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 06:33:19,345 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 13 treesize of output 9 [2024-11-09 06:33:19,622 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 18 treesize of output 13 [2024-11-09 06:33:19,788 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 18 treesize of output 13 [2024-11-09 06:33:19,951 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 18 treesize of output 13 [2024-11-09 06:33:20,118 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 18 treesize of output 13 [2024-11-09 06:33:20,295 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 18 treesize of output 13 [2024-11-09 06:33:20,461 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 18 treesize of output 13 [2024-11-09 06:33:20,628 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 18 treesize of output 13 [2024-11-09 06:33:20,797 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 18 treesize of output 13 [2024-11-09 06:33:20,990 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 18 treesize of output 13 [2024-11-09 06:33:21,177 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 18 treesize of output 13 [2024-11-09 06:33:21,365 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 18 treesize of output 13 [2024-11-09 06:33:21,545 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 18 treesize of output 13 [2024-11-09 06:33:21,733 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 18 treesize of output 13 [2024-11-09 06:33:21,923 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 18 treesize of output 13 [2024-11-09 06:33:22,118 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 18 treesize of output 13 [2024-11-09 06:33:22,318 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 18 treesize of output 13 [2024-11-09 06:33:22,353 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 06:33:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 54 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:33:22,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:33:22,723 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2024-11-09 06:33:23,324 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3346 (Array Int Int)) (v_ArrVal_3348 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3346) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:24,133 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3344 (Array Int Int)) (v_ArrVal_3348 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3344) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:24,144 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:24,157 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3343 (Array Int Int)) (v_ArrVal_3348 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3343) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:24,167 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:26,189 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3342 (Array Int Int)) (v_ArrVal_3348 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3342) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:26,203 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:26,216 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3341 (Array Int Int)) (v_ArrVal_3348 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3341) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:27,395 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int)) (v_ArrVal_3339 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3339) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:28,036 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 11)) 0)) is different from false [2024-11-09 06:33:28,328 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:28,628 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:29,000 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:29,418 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 15 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:29,434 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3333 (Array Int Int)) (v_ArrVal_3348 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3333) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 15 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:29,841 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3332 (Array Int Int)) (v_ArrVal_3348 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3332) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 16 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:29,854 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3348 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3348) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 17 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:33:29,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:33:29,868 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 06:33:29,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:33:29,884 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 06:33:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 54 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 583 not checked. [2024-11-09 06:33:30,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333512313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:33:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857339116] [2024-11-09 06:33:30,703 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:33:30,703 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:33:30,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:33:30,703 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:33:30,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:33:31,424 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:33:37,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29589#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_941| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_951| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_951|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_941|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_951|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_941|))))' at error location [2024-11-09 06:33:37,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:33:37,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:33:37,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 58, 58] total 148 [2024-11-09 06:33:37,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779315453] [2024-11-09 06:33:37,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:33:37,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2024-11-09 06:33:37,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:37,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2024-11-09 06:33:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=18766, Unknown=551, NotChecked=5310, Total=25122 [2024-11-09 06:33:37,093 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 149 states, 149 states have (on average 2.302013422818792) internal successors, (343), 148 states have internal predecessors, (343), 0 states have call successors, (0), 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 06:33:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:56,759 INFO L93 Difference]: Finished difference Result 246 states and 247 transitions. [2024-11-09 06:33:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-09 06:33:56,760 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.302013422818792) internal successors, (343), 148 states have internal predecessors, (343), 0 states have call successors, (0), 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 148 [2024-11-09 06:33:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:56,760 INFO L225 Difference]: With dead ends: 246 [2024-11-09 06:33:56,760 INFO L226 Difference]: Without dead ends: 154 [2024-11-09 06:33:56,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 360 SyntacticMatches, 18 SemanticMatches, 190 ConstructedPredicates, 18 IntricatePredicates, 0 DeprecatedPredicates, 7313 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=696, Invalid=28923, Unknown=555, NotChecked=6498, Total=36672 [2024-11-09 06:33:56,763 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 8554 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2443 SdHoareTripleChecker+Invalid, 11288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 8554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2717 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:56,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2443 Invalid, 11288 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 8554 Invalid, 0 Unknown, 2717 Unchecked, 10.1s Time] [2024-11-09 06:33:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-09 06:33:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2024-11-09 06:33:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 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 06:33:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2024-11-09 06:33:56,766 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2024-11-09 06:33:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:56,767 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2024-11-09 06:33:56,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.302013422818792) internal successors, (343), 148 states have internal predecessors, (343), 0 states have call successors, (0), 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 06:33:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2024-11-09 06:33:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 06:33:56,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:56,768 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2024-11-09 06:33:56,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-09 06:33:56,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:56,969 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:33:56,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:56,969 INFO L85 PathProgramCache]: Analyzing trace with hash 547537874, now seen corresponding path program 35 times [2024-11-09 06:33:56,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:56,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040140951] [2024-11-09 06:33:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:56,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 376 proven. 920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:00,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040140951] [2024-11-09 06:34:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040140951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733246422] [2024-11-09 06:34:00,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:34:00,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:00,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:00,436 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:00,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-09 06:34:24,585 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-09 06:34:24,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:34:24,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-09 06:34:24,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:24,622 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 06:34:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 442 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:26,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:34:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 442 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:32,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733246422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:34:32,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419270288] [2024-11-09 06:34:32,997 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:34:32,997 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:34:32,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:34:32,997 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:34:32,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:34:33,665 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:34:37,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31084#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_984| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_995| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_984|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_995|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_984|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_995|))))' at error location [2024-11-09 06:34:37,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:34:37,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:34:37,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 101 [2024-11-09 06:34:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426541570] [2024-11-09 06:34:37,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:34:37,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-09 06:34:37,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-09 06:34:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1595, Invalid=11058, Unknown=3, NotChecked=0, Total=12656 [2024-11-09 06:34:37,401 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 103 states, 102 states have (on average 3.9215686274509802) internal successors, (400), 102 states have internal predecessors, (400), 0 states have call successors, (0), 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 06:34:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:43,503 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2024-11-09 06:34:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-09 06:34:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 3.9215686274509802) internal successors, (400), 102 states have internal predecessors, (400), 0 states have call successors, (0), 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 151 [2024-11-09 06:34:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:43,505 INFO L225 Difference]: With dead ends: 157 [2024-11-09 06:34:43,505 INFO L226 Difference]: Without dead ends: 157 [2024-11-09 06:34:43,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4861 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=2099, Invalid=15190, Unknown=3, NotChecked=0, Total=17292 [2024-11-09 06:34:43,507 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:43,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 977 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-09 06:34:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-09 06:34:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-09 06:34:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 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 06:34:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2024-11-09 06:34:43,512 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 151 [2024-11-09 06:34:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:43,513 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2024-11-09 06:34:43,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 3.9215686274509802) internal successors, (400), 102 states have internal predecessors, (400), 0 states have call successors, (0), 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 06:34:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2024-11-09 06:34:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-09 06:34:43,514 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:43,514 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2024-11-09 06:34:43,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-09 06:34:43,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:43,715 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:34:43,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash 459440133, now seen corresponding path program 36 times [2024-11-09 06:34:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:43,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231727665] [2024-11-09 06:34:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:43,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 57 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:34:55,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:55,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231727665] [2024-11-09 06:34:55,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231727665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:55,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909122088] [2024-11-09 06:34:55,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:34:55,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:55,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:55,032 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:55,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-09 06:35:08,576 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:35:08,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:08,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 298 conjuncts are in the unsatisfiable core [2024-11-09 06:35:08,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:08,604 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 18 treesize of output 16 [2024-11-09 06:35:09,110 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 13 treesize of output 9 [2024-11-09 06:35:09,314 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 18 treesize of output 13 [2024-11-09 06:35:09,534 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 18 treesize of output 13 [2024-11-09 06:35:09,742 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 18 treesize of output 13 [2024-11-09 06:35:09,953 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 18 treesize of output 13 [2024-11-09 06:35:10,171 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 18 treesize of output 13 [2024-11-09 06:35:10,371 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 18 treesize of output 13 [2024-11-09 06:35:10,592 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 18 treesize of output 13 [2024-11-09 06:35:10,798 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 18 treesize of output 13 [2024-11-09 06:35:11,020 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 18 treesize of output 13 [2024-11-09 06:35:11,246 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 18 treesize of output 13 [2024-11-09 06:35:11,462 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 18 treesize of output 13 [2024-11-09 06:35:11,681 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 18 treesize of output 13 [2024-11-09 06:35:11,911 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 18 treesize of output 13 [2024-11-09 06:35:12,136 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 18 treesize of output 13 [2024-11-09 06:35:12,351 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 18 treesize of output 13 [2024-11-09 06:35:12,619 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 18 treesize of output 13 [2024-11-09 06:35:12,974 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 18 treesize of output 13 [2024-11-09 06:35:13,218 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 06:35:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 57 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:13,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:13,431 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2024-11-09 06:35:14,432 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3684 (Array Int Int)) (v_ArrVal_3686 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3684) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:14,445 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:15,126 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3682 (Array Int Int)) (v_ArrVal_3686 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3682) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:15,139 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:15,466 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:16,203 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int)) (v_ArrVal_3679 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3679) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:16,217 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:16,270 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int)) (v_ArrVal_3678 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3678) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:16,284 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:16,628 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:35:16,651 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int)) (v_ArrVal_3676 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3676) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 10)) 0)) is different from false [2024-11-09 06:35:17,401 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:17,417 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3674 (Array Int Int)) (v_ArrVal_3686 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3674) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:17,429 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:18,127 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3672 (Array Int Int)) (v_ArrVal_3686 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3672) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:18,490 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3671 (Array Int Int)) (v_ArrVal_3686 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3671) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 15 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:18,503 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 16 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:18,525 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3670 (Array Int Int)) (v_ArrVal_3686 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3670) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 16 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:18,538 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_3686) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 17 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2024-11-09 06:35:19,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:35:19,261 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 06:35:19,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:35:19,272 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 06:35:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 57 proven. 657 refuted. 0 times theorem prover too weak. 0 trivial. 675 not checked. [2024-11-09 06:35:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909122088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:20,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145767550] [2024-11-09 06:35:20,054 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:35:20,054 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:20,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:20,054 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:20,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:20,744 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:25,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32514#(and (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_1030| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_1041| Int)) (and (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_1030|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_1030|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_1041|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_1041|))))' at error location [2024-11-09 06:35:25,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:25,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:25,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 61, 61] total 137 [2024-11-09 06:35:25,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889101547] [2024-11-09 06:35:25,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:25,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2024-11-09 06:35:25,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2024-11-09 06:35:25,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=15446, Unknown=432, NotChecked=5420, Total=21756 [2024-11-09 06:35:25,800 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 138 states, 138 states have (on average 2.246376811594203) internal successors, (310), 137 states have internal predecessors, (310), 0 states have call successors, (0), 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 06:35:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:46,644 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2024-11-09 06:35:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-09 06:35:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.246376811594203) internal successors, (310), 137 states have internal predecessors, (310), 0 states have call successors, (0), 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 156 [2024-11-09 06:35:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:46,646 INFO L225 Difference]: With dead ends: 259 [2024-11-09 06:35:46,646 INFO L226 Difference]: Without dead ends: 162 [2024-11-09 06:35:46,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 399 SyntacticMatches, 20 SemanticMatches, 181 ConstructedPredicates, 20 IntricatePredicates, 0 DeprecatedPredicates, 6292 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=650, Invalid=25398, Unknown=438, NotChecked=6820, Total=33306 [2024-11-09 06:35:46,648 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 2493 mSDsCounter, 0 mSdLazyCounter, 9387 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 12585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 9387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3180 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:46,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2532 Invalid, 12585 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [18 Valid, 9387 Invalid, 0 Unknown, 3180 Unchecked, 11.4s Time] [2024-11-09 06:35:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-09 06:35:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2024-11-09 06:35:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 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 06:35:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2024-11-09 06:35:46,652 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2024-11-09 06:35:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:46,652 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2024-11-09 06:35:46,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.246376811594203) internal successors, (310), 137 states have internal predecessors, (310), 0 states have call successors, (0), 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 06:35:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2024-11-09 06:35:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 06:35:46,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:46,654 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1] [2024-11-09 06:35:46,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-09 06:35:46,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:46,855 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:35:46,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash 353361544, now seen corresponding path program 37 times [2024-11-09 06:35:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905390701] [2024-11-09 06:35:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:46,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 425 proven. 1019 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:51,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:51,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905390701] [2024-11-09 06:35:51,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905390701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:51,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247924358] [2024-11-09 06:35:51,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:35:51,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:51,026 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:51,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-09 06:35:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:51,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-11-09 06:35:51,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 477 proven. 967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:54,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:56,721 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 06:35:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 477 proven. 967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:35:58,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247924358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162677993] [2024-11-09 06:35:58,053 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:35:58,053 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:58,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:58,054 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:58,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:58,649 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:01,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34068#(and (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_1075| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_1087| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_1087|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_1075|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_1087|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_1075|))) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0))' at error location [2024-11-09 06:36:01,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:01,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:01,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 85 [2024-11-09 06:36:01,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517333646] [2024-11-09 06:36:01,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:01,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-09 06:36:01,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:01,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-09 06:36:01,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=8396, Unknown=3, NotChecked=0, Total=9312 [2024-11-09 06:36:01,903 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 87 states, 86 states have (on average 3.7325581395348837) internal successors, (321), 86 states have internal predecessors, (321), 0 states have call successors, (0), 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 06:36:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:08,617 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2024-11-09 06:36:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-09 06:36:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.7325581395348837) internal successors, (321), 86 states have internal predecessors, (321), 0 states have call successors, (0), 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 06:36:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:08,619 INFO L225 Difference]: With dead ends: 165 [2024-11-09 06:36:08,619 INFO L226 Difference]: Without dead ends: 165 [2024-11-09 06:36:08,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 402 SyntacticMatches, 20 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5731 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1197, Invalid=12140, Unknown=3, NotChecked=0, Total=13340 [2024-11-09 06:36:08,621 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 4201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:08,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1216 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-09 06:36:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-09 06:36:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-11-09 06:36:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 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 06:36:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2024-11-09 06:36:08,625 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 159 [2024-11-09 06:36:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:08,625 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2024-11-09 06:36:08,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.7325581395348837) internal successors, (321), 86 states have internal predecessors, (321), 0 states have call successors, (0), 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 06:36:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2024-11-09 06:36:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-09 06:36:08,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:08,627 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2024-11-09 06:36:08,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-09 06:36:08,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:08,828 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-09 06:36:08,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2007475983, now seen corresponding path program 38 times [2024-11-09 06:36:08,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90573888] [2024-11-09 06:36:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 60 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:21,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:21,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90573888] [2024-11-09 06:36:21,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90573888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:21,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076261833] [2024-11-09 06:36:21,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:21,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:21,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:21,488 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:21,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec99c6c-cb09-4082-b013-086178ec59e4/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process