./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/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_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/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_12ec3459-7502-40fe-9213-804273b53e13/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 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:02:44,575 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:02:44,685 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 05:02:44,693 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:02:44,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:02:44,747 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:02:44,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:02:44,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:02:44,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:02:44,752 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:02:44,754 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:02:44,754 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:02:44,755 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:02:44,755 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:02:44,755 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:02:44,756 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:02:44,756 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:02:44,760 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:02:44,761 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:02:44,761 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:02:44,761 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:02:44,762 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:02:44,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 05:02:44,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 05:02:44,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:02:44,765 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:02:44,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:02:44,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:02:44,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:02:44,766 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 05:02:44,766 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 05:02:44,767 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 05:02:44,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:02:44,768 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 05:02:44,778 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:02:44,778 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 05:02:44,778 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:02:44,779 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:02:44,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:02:44,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:02:44,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:02:44,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:02:44,781 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:02:44,781 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:02:44,782 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:02:44,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:02:44,782 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:02:44,782 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:02:44,783 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:02:44,783 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_12ec3459-7502-40fe-9213-804273b53e13/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2024-11-09 05:02:45,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:02:45,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:02:45,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:02:45,167 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:02:45,168 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:02:45,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i Unable to find full path for "g++" [2024-11-09 05:02:47,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:02:47,628 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:02:47,628 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2024-11-09 05:02:47,653 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/data/6eaf4e907/93ab14ad9c5d4a5ebe402049da23dc07/FLAGa7ba84358 [2024-11-09 05:02:47,867 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/data/6eaf4e907/93ab14ad9c5d4a5ebe402049da23dc07 [2024-11-09 05:02:47,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:02:47,883 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:02:47,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:02:47,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:02:47,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:02:47,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:02:47" (1/1) ... [2024-11-09 05:02:47,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35794d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:47, skipping insertion in model container [2024-11-09 05:02:47,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:02:47" (1/1) ... [2024-11-09 05:02:47,941 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:02:48,332 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 05:02:48,333 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 05:02:48,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:02:48,357 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:02:48,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:02:48,448 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:02:48,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48 WrapperNode [2024-11-09 05:02:48,449 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:02:48,450 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:02:48,451 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:02:48,451 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:02:48,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,483 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,514 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2024-11-09 05:02:48,516 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:02:48,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:02:48,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:02:48,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:02:48,530 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,534 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,544 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,548 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,549 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:02:48,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:02:48,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:02:48,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:02:48,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (1/1) ... [2024-11-09 05:02:48,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:02:48,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:48,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:02:48,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:02:48,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:02:48,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:02:48,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:02:48,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:02:48,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:02:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:02:48,881 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:02:48,883 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:02:49,207 INFO L? ?]: Removed 69 outVars from TransFormulas that were not future-live. [2024-11-09 05:02:49,207 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:02:49,302 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:02:49,304 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 05:02:49,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:02:49 BoogieIcfgContainer [2024-11-09 05:02:49,305 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:02:49,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:02:49,310 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:02:49,314 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:02:49,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:02:47" (1/3) ... [2024-11-09 05:02:49,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61727000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:02:49, skipping insertion in model container [2024-11-09 05:02:49,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:48" (2/3) ... [2024-11-09 05:02:49,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61727000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:02:49, skipping insertion in model container [2024-11-09 05:02:49,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:02:49" (3/3) ... [2024-11-09 05:02:49,320 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2024-11-09 05:02:49,349 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:02:49,350 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2024-11-09 05:02:49,395 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:02:49,402 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;@2e9feccd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:02:49,402 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-09 05:02:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 23 states have (on average 2.217391304347826) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 05:02:49,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:49,412 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 05:02:49,413 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:49,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 157473, now seen corresponding path program 1 times [2024-11-09 05:02:49,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:49,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123775926] [2024-11-09 05:02:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:49,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:49,653 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 05:02:49,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:49,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123775926] [2024-11-09 05:02:49,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123775926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:49,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:49,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 05:02:49,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968893248] [2024-11-09 05:02:49,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:49,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:02:49,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:02:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:02:49,708 INFO L87 Difference]: Start difference. First operand has 41 states, 23 states have (on average 2.217391304347826) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:49,805 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2024-11-09 05:02:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:02:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-09 05:02:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:49,818 INFO L225 Difference]: With dead ends: 42 [2024-11-09 05:02:49,819 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 05:02:49,821 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 05:02:49,828 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:49,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 05:02:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 05:02:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-09 05:02:49,875 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 3 [2024-11-09 05:02:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:49,876 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-09 05:02:49,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-09 05:02:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 05:02:49,878 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:49,879 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 05:02:49,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:02:49,880 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:49,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash 151307657, now seen corresponding path program 1 times [2024-11-09 05:02:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633184259] [2024-11-09 05:02:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:50,181 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 05:02:50,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633184259] [2024-11-09 05:02:50,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633184259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:50,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:50,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:02:50,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062146402] [2024-11-09 05:02:50,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:50,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:02:50,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:02:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:02:50,185 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:50,238 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-11-09 05:02:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:02:50,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2024-11-09 05:02:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:50,240 INFO L225 Difference]: With dead ends: 38 [2024-11-09 05:02:50,240 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 05:02:50,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:02:50,242 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:50,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 47 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:02:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 05:02:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-09 05:02:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 37 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 05:02:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-11-09 05:02:50,249 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 5 [2024-11-09 05:02:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:50,249 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-11-09 05:02:50,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-11-09 05:02:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 05:02:50,251 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:50,251 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 05:02:50,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:02:50,252 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:50,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:50,253 INFO L85 PathProgramCache]: Analyzing trace with hash 151307658, now seen corresponding path program 1 times [2024-11-09 05:02:50,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:50,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489242278] [2024-11-09 05:02:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:50,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:50,769 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 05:02:50,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:50,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489242278] [2024-11-09 05:02:50,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489242278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:50,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:50,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:02:50,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312561895] [2024-11-09 05:02:50,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:50,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:02:50,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:02:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:02:50,776 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:50,946 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-11-09 05:02:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:02:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2024-11-09 05:02:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:50,949 INFO L225 Difference]: With dead ends: 41 [2024-11-09 05:02:50,949 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 05:02:50,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:02:50,951 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:50,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 97 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:50,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 05:02:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-09 05:02:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 40 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 05:02:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-11-09 05:02:50,959 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 5 [2024-11-09 05:02:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:50,959 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-11-09 05:02:50,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-11-09 05:02:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:02:50,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:50,961 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:50,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:02:50,961 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:50,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash -611810556, now seen corresponding path program 1 times [2024-11-09 05:02:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:50,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021232940] [2024-11-09 05:02:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:51,212 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 05:02:51,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021232940] [2024-11-09 05:02:51,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021232940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:51,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:51,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:02:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675803992] [2024-11-09 05:02:51,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:51,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:02:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:02:51,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:02:51,216 INFO L87 Difference]: Start difference. First operand 41 states and 50 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 05:02:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:51,321 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2024-11-09 05:02:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:02:51,322 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 05:02:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:51,322 INFO L225 Difference]: With dead ends: 41 [2024-11-09 05:02:51,324 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 05:02:51,325 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:02:51,326 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:51,326 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 75 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 05:02:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-09 05:02:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 40 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 05:02:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-11-09 05:02:51,334 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 7 [2024-11-09 05:02:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:51,335 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-11-09 05:02:51,335 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 05:02:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-11-09 05:02:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 05:02:51,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:51,336 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-09 05:02:51,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:02:51,337 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:51,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:51,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2106660127, now seen corresponding path program 1 times [2024-11-09 05:02:51,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:51,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455542327] [2024-11-09 05:02:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:51,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:51,775 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 05:02:51,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455542327] [2024-11-09 05:02:51,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455542327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:02:51,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217652216] [2024-11-09 05:02:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:51,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:51,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:51,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:02:51,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:02:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:51,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:02:51,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:02:52,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:02:52,105 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 05:02:52,120 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 05:02:52,369 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 05:02:52,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:02:52,596 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 05:02:52,608 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 05:02:52,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217652216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:02:52,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2167013] [2024-11-09 05:02:52,638 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-09 05:02:52,638 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:02:52,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:02:52,649 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:02:52,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:02:54,087 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:02:54,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '442#(exists ((|v_ULTIMATE.start_main_~nondetString1~0#1.base_28| Int) (|v_ULTIMATE.start_main_~i~0#1_34| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.offset_26| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~0#1_34|) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_28|) (= |v_ULTIMATE.start_main_~nondetString1~0#1.offset_26| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_28|) |v_ULTIMATE.start_main_~i~0#1_34|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_~length1~0#1|)))' at error location [2024-11-09 05:02:54,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:02:54,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:02:54,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-09 05:02:54,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633265191] [2024-11-09 05:02:54,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:02:54,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:02:54,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:02:54,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:02:54,607 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:54,868 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2024-11-09 05:02:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:02:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 05:02:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:54,869 INFO L225 Difference]: With dead ends: 41 [2024-11-09 05:02:54,869 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 05:02:54,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:02:54,871 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:54,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 05:02:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-11-09 05:02:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-11-09 05:02:54,880 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 8 [2024-11-09 05:02:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:54,880 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-11-09 05:02:54,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-11-09 05:02:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 05:02:54,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:54,883 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:54,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:02:55,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:55,084 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:55,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1560367461, now seen corresponding path program 1 times [2024-11-09 05:02:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:55,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964337598] [2024-11-09 05:02:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:55,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:55,412 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 05:02:55,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:55,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964337598] [2024-11-09 05:02:55,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964337598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:02:55,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230112674] [2024-11-09 05:02:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:55,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:55,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:55,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:02:55,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:02:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:55,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:02:55,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:02:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:02:55,661 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:02:55,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230112674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:55,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:02:55,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-09 05:02:55,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473495935] [2024-11-09 05:02:55,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:55,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:02:55,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:55,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:02:55,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:02:55,664 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 05:02:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:55,784 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-11-09 05:02:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:02:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 05:02:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:55,785 INFO L225 Difference]: With dead ends: 37 [2024-11-09 05:02:55,785 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 05:02:55,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:02:55,787 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:55,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 85 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 05:02:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 05:02:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-11-09 05:02:55,791 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 10 [2024-11-09 05:02:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:55,792 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-11-09 05:02:55,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 05:02:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-11-09 05:02:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 05:02:55,793 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:55,793 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:55,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 05:02:55,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:02:55,998 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:55,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1560378289, now seen corresponding path program 1 times [2024-11-09 05:02:55,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:55,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010880269] [2024-11-09 05:02:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:55,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:02:56,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:56,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010880269] [2024-11-09 05:02:56,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010880269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:56,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:56,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:02:56,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371495178] [2024-11-09 05:02:56,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:56,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:02:56,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:02:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:02:56,048 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:56,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:56,084 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2024-11-09 05:02:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:02:56,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 05:02:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:56,085 INFO L225 Difference]: With dead ends: 35 [2024-11-09 05:02:56,086 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 05:02:56,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:02:56,087 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:56,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:02:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 05:02:56,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 05:02:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 34 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 05:02:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-09 05:02:56,090 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 10 [2024-11-09 05:02:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:56,091 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-09 05:02:56,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-09 05:02:56,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 05:02:56,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:56,094 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:56,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 05:02:56,094 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:56,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1560378288, now seen corresponding path program 1 times [2024-11-09 05:02:56,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:56,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140539340] [2024-11-09 05:02:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:56,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:56,241 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 05:02:56,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140539340] [2024-11-09 05:02:56,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140539340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:02:56,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033946547] [2024-11-09 05:02:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:56,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:56,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:56,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:02:56,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:02:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:56,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:02:56,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:02:56,408 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 05:02:56,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:02:56,494 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 05:02:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033946547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:02:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413289405] [2024-11-09 05:02:56,498 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:02:56,498 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:02:56,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:02:56,502 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:02:56,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:02:57,435 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:02:57,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '786#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int)) (and (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) 0))))' at error location [2024-11-09 05:02:57,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:02:57,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:02:57,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 05:02:57,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14834783] [2024-11-09 05:02:57,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:02:57,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:02:57,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:57,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:02:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:02:57,948 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:58,148 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-11-09 05:02:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:02:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 05:02:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:58,149 INFO L225 Difference]: With dead ends: 45 [2024-11-09 05:02:58,150 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 05:02:58,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:02:58,151 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:58,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 159 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 05:02:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2024-11-09 05:02:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-09 05:02:58,154 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 10 [2024-11-09 05:02:58,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:58,154 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-09 05:02:58,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-09 05:02:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 05:02:58,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:58,155 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:58,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:02:58,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:58,356 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:58,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:58,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1126751032, now seen corresponding path program 1 times [2024-11-09 05:02:58,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:58,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742881988] [2024-11-09 05:02:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:58,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:02:58,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:58,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742881988] [2024-11-09 05:02:58,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742881988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:58,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:58,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:02:58,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505334187] [2024-11-09 05:02:58,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:58,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:02:58,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:02:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:02:58,639 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:58,701 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-11-09 05:02:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:02:58,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2024-11-09 05:02:58,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:58,702 INFO L225 Difference]: With dead ends: 46 [2024-11-09 05:02:58,703 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 05:02:58,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:02:58,703 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:58,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 05:02:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-09 05:02:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.588235294117647) internal successors, (54), 44 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 05:02:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-11-09 05:02:58,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 11 [2024-11-09 05:02:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:58,713 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-11-09 05:02:58,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-11-09 05:02:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:02:58,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:58,714 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:58,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 05:02:58,715 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:58,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash -475925209, now seen corresponding path program 1 times [2024-11-09 05:02:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:58,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009514690] [2024-11-09 05:02:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:58,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:02:58,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:58,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009514690] [2024-11-09 05:02:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009514690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:58,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:58,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:02:58,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579594133] [2024-11-09 05:02:58,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:58,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:02:58,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:02:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:02:58,810 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 05:02:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:58,877 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-11-09 05:02:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:02:58,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 05:02:58,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:58,878 INFO L225 Difference]: With dead ends: 42 [2024-11-09 05:02:58,879 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 05:02:58,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:02:58,880 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:58,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 50 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 05:02:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-09 05:02:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.5) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-11-09 05:02:58,887 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 13 [2024-11-09 05:02:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:58,887 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-11-09 05:02:58,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 05:02:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-11-09 05:02:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:02:58,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:58,891 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:58,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 05:02:58,891 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:02:58,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash -475925208, now seen corresponding path program 1 times [2024-11-09 05:02:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:58,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324664992] [2024-11-09 05:02:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:59,073 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 05:02:59,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:59,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324664992] [2024-11-09 05:02:59,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324664992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:02:59,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083743650] [2024-11-09 05:02:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:59,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:59,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:02:59,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:02:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:59,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 05:02:59,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:02:59,257 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 05:02:59,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:02:59,326 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 17 treesize of output 13 [2024-11-09 05:02:59,412 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 05:02:59,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083743650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:02:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220220831] [2024-11-09 05:02:59,417 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 05:02:59,417 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:02:59,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:02:59,418 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:02:59,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:00,414 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:01,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [220220831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:01,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:01,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 8, 7] total 24 [2024-11-09 05:03:01,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751693281] [2024-11-09 05:03:01,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:01,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:03:01,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:03:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:03:01,068 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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 05:03:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:01,457 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-11-09 05:03:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:03:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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 05:03:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:01,459 INFO L225 Difference]: With dead ends: 47 [2024-11-09 05:03:01,459 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 05:03:01,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-11-09 05:03:01,460 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:01,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 94 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:03:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 05:03:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-11-09 05:03:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.5) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-11-09 05:03:01,467 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 13 [2024-11-09 05:03:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:01,468 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-11-09 05:03:01,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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 05:03:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-11-09 05:03:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:03:01,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:01,471 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:01,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:03:01,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:03:01,672 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:01,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash 865672537, now seen corresponding path program 2 times [2024-11-09 05:03:01,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:01,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820964944] [2024-11-09 05:03:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:01,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:03:01,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:01,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820964944] [2024-11-09 05:03:01,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820964944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:01,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:03:01,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:03:01,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344403808] [2024-11-09 05:03:01,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:01,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:03:01,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:03:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:03:01,952 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 05:03:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:02,021 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2024-11-09 05:03:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:03:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 13 [2024-11-09 05:03:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:02,023 INFO L225 Difference]: With dead ends: 45 [2024-11-09 05:03:02,025 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 05:03:02,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:03:02,026 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:02,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 58 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:03:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 05:03:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-09 05:03:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 44 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 05:03:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-11-09 05:03:02,032 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 13 [2024-11-09 05:03:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:02,032 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-11-09 05:03:02,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 05:03:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-11-09 05:03:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 05:03:02,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:02,033 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:02,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 05:03:02,033 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:02,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1868737686, now seen corresponding path program 1 times [2024-11-09 05:03:02,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:02,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308279094] [2024-11-09 05:03:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:02,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:02,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:02,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308279094] [2024-11-09 05:03:02,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308279094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:02,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:03:02,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:03:02,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162447381] [2024-11-09 05:03:02,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:02,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:03:02,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:02,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:03:02,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:03:02,161 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:02,193 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2024-11-09 05:03:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:03:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2024-11-09 05:03:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:02,194 INFO L225 Difference]: With dead ends: 44 [2024-11-09 05:03:02,194 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 05:03:02,195 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 05:03:02,195 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:02,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 48 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:03:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 05:03:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-09 05:03:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.4) internal successors, (49), 41 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 05:03:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2024-11-09 05:03:02,198 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 14 [2024-11-09 05:03:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:02,199 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2024-11-09 05:03:02,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2024-11-09 05:03:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:03:02,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:02,200 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:02,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 05:03:02,200 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:02,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:02,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2097590879, now seen corresponding path program 1 times [2024-11-09 05:03:02,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:02,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408960250] [2024-11-09 05:03:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:02,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:02,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:02,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408960250] [2024-11-09 05:03:02,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408960250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:02,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936938217] [2024-11-09 05:03:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:02,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:02,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:02,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:02,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:03:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:02,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 05:03:02,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:02,725 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 05:03:02,819 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 17 treesize of output 13 [2024-11-09 05:03:02,885 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 22 treesize of output 17 [2024-11-09 05:03:03,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:03,040 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 21 treesize of output 20 [2024-11-09 05:03:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:03,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:03,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:03,408 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 24 treesize of output 25 [2024-11-09 05:03:03,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:03,429 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 36 treesize of output 35 [2024-11-09 05:03:03,439 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 17 treesize of output 13 [2024-11-09 05:03:03,449 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 9 treesize of output 7 [2024-11-09 05:03:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:03,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936938217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:03,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666837667] [2024-11-09 05:03:03,645 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:03:03,645 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:03,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:03,646 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:03,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:04,830 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:05,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1560#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-09 05:03:05,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:05,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:05,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-09 05:03:05,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264617336] [2024-11-09 05:03:05,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:05,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:03:05,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:05,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:03:05,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:03:05,650 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:06,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:06,682 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2024-11-09 05:03:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:03:06,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 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 05:03:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:06,683 INFO L225 Difference]: With dead ends: 72 [2024-11-09 05:03:06,683 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 05:03:06,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=185, Invalid=1707, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 05:03:06,686 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 209 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:06,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 100 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:03:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 05:03:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2024-11-09 05:03:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 50 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 05:03:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2024-11-09 05:03:06,694 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 15 [2024-11-09 05:03:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:06,694 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2024-11-09 05:03:06,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2024-11-09 05:03:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 05:03:06,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:06,695 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:06,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:03:06,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:03:06,896 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:06,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash -600809302, now seen corresponding path program 1 times [2024-11-09 05:03:06,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:06,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551601459] [2024-11-09 05:03:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:06,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:06,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551601459] [2024-11-09 05:03:06,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551601459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:06,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:03:06,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:03:06,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420393846] [2024-11-09 05:03:06,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:06,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:03:06,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:03:06,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:03:06,988 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:07,040 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2024-11-09 05:03:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:03:07,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 05:03:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:07,041 INFO L225 Difference]: With dead ends: 50 [2024-11-09 05:03:07,042 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 05:03:07,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:03:07,042 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:07,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:03:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 05:03:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-09 05:03:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 49 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 05:03:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-11-09 05:03:07,050 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 16 [2024-11-09 05:03:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:07,050 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-11-09 05:03:07,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-11-09 05:03:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 05:03:07,051 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:07,051 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:07,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 05:03:07,051 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:07,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash -600809301, now seen corresponding path program 1 times [2024-11-09 05:03:07,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:07,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444849670] [2024-11-09 05:03:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:07,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:07,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:07,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444849670] [2024-11-09 05:03:07,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444849670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:07,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:03:07,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:03:07,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627826984] [2024-11-09 05:03:07,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:07,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:03:07,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:03:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:03:07,274 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:07,369 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-09 05:03:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:03:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 05:03:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:07,370 INFO L225 Difference]: With dead ends: 52 [2024-11-09 05:03:07,370 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 05:03:07,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 05:03:07,371 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:07,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:03:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 05:03:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-09 05:03:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-09 05:03:07,376 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 16 [2024-11-09 05:03:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:07,376 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-09 05:03:07,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-09 05:03:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 05:03:07,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:07,377 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:07,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 05:03:07,377 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:07,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2025871920, now seen corresponding path program 1 times [2024-11-09 05:03:07,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:07,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327819602] [2024-11-09 05:03:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:07,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:07,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:07,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327819602] [2024-11-09 05:03:07,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327819602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:07,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267949704] [2024-11-09 05:03:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:07,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:07,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:07,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:07,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:03:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:07,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:03:07,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:07,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:07,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267949704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:07,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [77159736] [2024-11-09 05:03:07,886 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:03:07,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:07,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:07,887 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:07,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:08,879 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:09,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2043#(exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.offset_34| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_36| Int) (|v_ULTIMATE.start_main_~i~1#1_42| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_42|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_36|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_36|) |v_ULTIMATE.start_main_~i~1#1_42|) (= |v_ULTIMATE.start_main_~nondetString2~0#1.offset_34| 0) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 2 |ULTIMATE.start_main_~length2~0#1|)))' at error location [2024-11-09 05:03:09,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:09,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:09,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-09 05:03:09,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039975109] [2024-11-09 05:03:09,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:09,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:03:09,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:03:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:03:09,349 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 05:03:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:09,535 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-11-09 05:03:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:03:09,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 16 [2024-11-09 05:03:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:09,537 INFO L225 Difference]: With dead ends: 68 [2024-11-09 05:03:09,537 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 05:03:09,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 05:03:09,539 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:09,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 66 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:03:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 05:03:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2024-11-09 05:03:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 59 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 05:03:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-11-09 05:03:09,544 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 16 [2024-11-09 05:03:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:09,545 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-11-09 05:03:09,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 05:03:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-11-09 05:03:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 05:03:09,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:09,546 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:09,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:03:09,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:03:09,747 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:09,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1445172262, now seen corresponding path program 2 times [2024-11-09 05:03:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334781774] [2024-11-09 05:03:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:10,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334781774] [2024-11-09 05:03:10,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334781774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:10,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109935480] [2024-11-09 05:03:10,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:03:10,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:10,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:10,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:10,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:03:10,285 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:03:10,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:03:10,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 05:03:10,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:10,308 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 05:03:10,476 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 17 treesize of output 13 [2024-11-09 05:03:10,530 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 22 treesize of output 17 [2024-11-09 05:03:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:10,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:10,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:10,628 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 24 treesize of output 25 [2024-11-09 05:03:10,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:10,644 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 36 treesize of output 32 [2024-11-09 05:03:10,847 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 05:03:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109935480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:10,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507486003] [2024-11-09 05:03:10,859 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:03:10,860 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:10,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:10,861 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:10,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:12,093 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:13,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2308#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-09 05:03:13,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:13,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:13,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-09 05:03:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243084324] [2024-11-09 05:03:13,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:13,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:03:13,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:03:13,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:03:13,058 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 05:03:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:13,474 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-11-09 05:03:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:03:13,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) Word has length 17 [2024-11-09 05:03:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:13,475 INFO L225 Difference]: With dead ends: 69 [2024-11-09 05:03:13,475 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 05:03:13,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:03:13,477 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:13,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 132 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:03:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 05:03:13,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2024-11-09 05:03:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2024-11-09 05:03:13,480 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 17 [2024-11-09 05:03:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:13,480 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2024-11-09 05:03:13,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 05:03:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2024-11-09 05:03:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 05:03:13,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:13,481 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:13,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 05:03:13,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:13,686 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:13,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1622815560, now seen corresponding path program 1 times [2024-11-09 05:03:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:13,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970248381] [2024-11-09 05:03:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:13,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:03:14,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970248381] [2024-11-09 05:03:14,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970248381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831179647] [2024-11-09 05:03:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:14,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:14,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:14,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:14,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:03:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:14,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:03:14,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:14,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-09 05:03:14,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:03:14,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 05:03:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:03:14,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:03:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831179647] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:03:14,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 16 [2024-11-09 05:03:14,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032847388] [2024-11-09 05:03:14,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:14,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:03:14,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:03:14,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:03:14,842 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:15,092 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-11-09 05:03:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:03:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 17 [2024-11-09 05:03:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:15,094 INFO L225 Difference]: With dead ends: 65 [2024-11-09 05:03:15,094 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 05:03:15,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:03:15,095 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:15,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:03:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 05:03:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2024-11-09 05:03:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 61 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 05:03:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-11-09 05:03:15,099 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 17 [2024-11-09 05:03:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:15,100 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-11-09 05:03:15,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:15,100 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-11-09 05:03:15,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 05:03:15,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:15,101 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:15,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:03:15,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:15,306 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:15,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:15,307 INFO L85 PathProgramCache]: Analyzing trace with hash 836473881, now seen corresponding path program 2 times [2024-11-09 05:03:15,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:15,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712320995] [2024-11-09 05:03:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:15,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:03:15,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712320995] [2024-11-09 05:03:15,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712320995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945962753] [2024-11-09 05:03:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:03:15,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:15,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:15,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:03:15,791 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:03:15,791 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:03:15,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:03:15,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:15,846 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 05:03:15,856 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 05:03:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:03:16,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:03:16,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945962753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:16,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849161964] [2024-11-09 05:03:16,652 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:03:16,652 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:16,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:16,652 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:16,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:17,842 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:18,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2842#(exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.base_42| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.offset_40| Int) (|v_ULTIMATE.start_main_~i~1#1_56| Int)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~nondetString2~0#1.offset_40| 0) (<= 0 |v_ULTIMATE.start_main_~i~1#1_56|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_42|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_42|) |v_ULTIMATE.start_main_~i~1#1_56|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 2 |ULTIMATE.start_main_~length2~0#1|)))' at error location [2024-11-09 05:03:18,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:18,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:18,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-09 05:03:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875008638] [2024-11-09 05:03:18,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:18,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:03:18,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:18,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:03:18,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:03:18,483 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:18,874 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-09 05:03:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:03:18,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 05:03:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:18,876 INFO L225 Difference]: With dead ends: 62 [2024-11-09 05:03:18,876 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 05:03:18,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 05:03:18,877 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:18,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 86 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:03:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 05:03:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-11-09 05:03:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2024-11-09 05:03:18,881 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 19 [2024-11-09 05:03:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:18,881 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2024-11-09 05:03:18,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2024-11-09 05:03:18,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 05:03:18,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:18,883 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:18,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:03:19,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:19,087 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:19,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:19,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1388201649, now seen corresponding path program 3 times [2024-11-09 05:03:19,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:19,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492750338] [2024-11-09 05:03:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:19,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:19,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492750338] [2024-11-09 05:03:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492750338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362138518] [2024-11-09 05:03:19,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:03:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:19,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:19,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:03:19,851 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:03:19,851 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:03:19,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-09 05:03:19,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:19,874 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 05:03:20,118 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 15 treesize of output 11 [2024-11-09 05:03:20,188 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 20 treesize of output 15 [2024-11-09 05:03:20,478 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2024-11-09 05:03:20,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 23 [2024-11-09 05:03:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:20,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:21,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:21,144 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 51 treesize of output 37 [2024-11-09 05:03:21,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:21,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 61 [2024-11-09 05:03:21,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:21,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2024-11-09 05:03:21,205 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 23 treesize of output 19 [2024-11-09 05:03:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:21,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362138518] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:21,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297499734] [2024-11-09 05:03:21,634 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:03:21,634 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:21,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:21,635 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:21,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:22,723 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:23,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3133#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-09 05:03:23,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:23,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:23,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 33 [2024-11-09 05:03:23,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529888863] [2024-11-09 05:03:23,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:23,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 05:03:23,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 05:03:23,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 05:03:23,937 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:26,553 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2024-11-09 05:03:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 05:03:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 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 05:03:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:26,554 INFO L225 Difference]: With dead ends: 104 [2024-11-09 05:03:26,554 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 05:03:26,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=437, Invalid=4533, Unknown=0, NotChecked=0, Total=4970 [2024-11-09 05:03:26,556 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 227 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:26,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 327 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 05:03:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 05:03:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 69. [2024-11-09 05:03:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 68 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 05:03:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2024-11-09 05:03:26,559 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 20 [2024-11-09 05:03:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:26,559 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2024-11-09 05:03:26,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2024-11-09 05:03:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 05:03:26,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:26,561 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:26,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:03:26,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 05:03:26,765 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:26,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash 948995577, now seen corresponding path program 1 times [2024-11-09 05:03:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:26,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173104993] [2024-11-09 05:03:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:26,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:27,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:27,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173104993] [2024-11-09 05:03:27,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173104993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:27,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208752269] [2024-11-09 05:03:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:27,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:27,010 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:27,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:03:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:27,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:03:27,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:27,206 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 14 treesize of output 10 [2024-11-09 05:03:27,357 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 05:03:27,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:27,362 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 18 treesize of output 10 [2024-11-09 05:03:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:27,385 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:03:27,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208752269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:27,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:03:27,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2024-11-09 05:03:27,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283572937] [2024-11-09 05:03:27,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:27,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:03:27,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:27,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:03:27,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:03:27,386 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 05:03:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:27,503 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2024-11-09 05:03:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:03:27,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 21 [2024-11-09 05:03:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:27,507 INFO L225 Difference]: With dead ends: 98 [2024-11-09 05:03:27,507 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 05:03:27,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:03:27,508 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:27,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 102 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:03:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 05:03:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2024-11-09 05:03:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 74 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 05:03:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2024-11-09 05:03:27,512 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 21 [2024-11-09 05:03:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:27,512 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2024-11-09 05:03:27,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 05:03:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2024-11-09 05:03:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 05:03:27,514 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:27,514 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:27,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 05:03:27,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 05:03:27,715 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:27,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1477259037, now seen corresponding path program 4 times [2024-11-09 05:03:27,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:27,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724445721] [2024-11-09 05:03:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:27,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:28,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:28,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724445721] [2024-11-09 05:03:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724445721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:28,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031126755] [2024-11-09 05:03:28,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:03:28,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:28,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:28,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:28,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:03:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:28,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 05:03:28,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:28,529 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 05:03:28,800 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 16 treesize of output 12 [2024-11-09 05:03:28,856 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 21 treesize of output 16 [2024-11-09 05:03:29,125 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-11-09 05:03:29,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 18 [2024-11-09 05:03:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:03:29,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:29,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:29,438 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 51 treesize of output 37 [2024-11-09 05:03:29,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:29,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 61 [2024-11-09 05:03:29,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:29,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2024-11-09 05:03:30,137 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 05:03:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:03:30,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031126755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:30,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289878371] [2024-11-09 05:03:30,173 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:03:30,173 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:30,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:30,174 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:30,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:31,259 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:32,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3618#true' at error location [2024-11-09 05:03:32,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:32,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:32,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-09 05:03:32,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629121995] [2024-11-09 05:03:32,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:32,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 05:03:32,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 05:03:32,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2012, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 05:03:32,753 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:35,023 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2024-11-09 05:03:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:03:35,024 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 05:03:35,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:35,024 INFO L225 Difference]: With dead ends: 135 [2024-11-09 05:03:35,024 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 05:03:35,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=328, Invalid=3962, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 05:03:35,026 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 144 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:35,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 283 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:03:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 05:03:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2024-11-09 05:03:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2024-11-09 05:03:35,031 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 24 [2024-11-09 05:03:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:35,032 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2024-11-09 05:03:35,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2024-11-09 05:03:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:03:35,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:35,033 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:35,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 05:03:35,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 05:03:35,234 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:35,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:35,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1865190279, now seen corresponding path program 1 times [2024-11-09 05:03:35,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:35,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253828160] [2024-11-09 05:03:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:35,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:03:35,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253828160] [2024-11-09 05:03:35,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253828160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:35,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755797795] [2024-11-09 05:03:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:35,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:35,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:35,635 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:35,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:03:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:35,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:03:35,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:03:35,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:36,136 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 05:03:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:03:36,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755797795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:36,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298794204] [2024-11-09 05:03:36,181 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:03:36,181 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:36,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:36,182 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:36,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:37,772 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:39,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4256#(and (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|))' at error location [2024-11-09 05:03:39,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:39,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:39,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-09 05:03:39,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045007964] [2024-11-09 05:03:39,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:39,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:03:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:03:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 05:03:39,351 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:39,546 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2024-11-09 05:03:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:03:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-09 05:03:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:39,547 INFO L225 Difference]: With dead ends: 123 [2024-11-09 05:03:39,547 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 05:03:39,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:03:39,548 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:39,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:03:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 05:03:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2024-11-09 05:03:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 117 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 05:03:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2024-11-09 05:03:39,553 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 27 [2024-11-09 05:03:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:39,553 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2024-11-09 05:03:39,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2024-11-09 05:03:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:03:39,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:39,554 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:39,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 05:03:39,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 05:03:39,755 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:39,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1849976364, now seen corresponding path program 5 times [2024-11-09 05:03:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925732019] [2024-11-09 05:03:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:41,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:41,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925732019] [2024-11-09 05:03:41,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925732019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:41,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062693995] [2024-11-09 05:03:41,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:03:41,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:41,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:41,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:41,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:03:41,766 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:03:41,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:03:41,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-09 05:03:41,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:41,796 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 05:03:42,336 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 16 treesize of output 12 [2024-11-09 05:03:42,448 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 21 treesize of output 16 [2024-11-09 05:03:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:42,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:43,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:43,056 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 77 treesize of output 49 [2024-11-09 05:03:43,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:43,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 90 [2024-11-09 05:03:43,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:43,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 22 [2024-11-09 05:03:44,085 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 05:03:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:44,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062693995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835261447] [2024-11-09 05:03:44,092 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:03:44,092 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:44,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:44,093 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:44,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:44,988 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:46,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4517#true' at error location [2024-11-09 05:03:46,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:46,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2024-11-09 05:03:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912323938] [2024-11-09 05:03:46,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:46,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 05:03:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:46,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 05:03:46,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2423, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:03:46,627 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 41 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:48,093 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2024-11-09 05:03:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:03:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 41 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-09 05:03:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:48,094 INFO L225 Difference]: With dead ends: 159 [2024-11-09 05:03:48,095 INFO L226 Difference]: Without dead ends: 149 [2024-11-09 05:03:48,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=339, Invalid=3693, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 05:03:48,097 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:48,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 238 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:03:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-09 05:03:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2024-11-09 05:03:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 135 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2024-11-09 05:03:48,105 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 27 [2024-11-09 05:03:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:48,107 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2024-11-09 05:03:48,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 41 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2024-11-09 05:03:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 05:03:48,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:48,110 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:48,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 05:03:48,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 05:03:48,310 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:03:48,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash -30416829, now seen corresponding path program 6 times [2024-11-09 05:03:48,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:48,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112880461] [2024-11-09 05:03:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:48,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:49,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:49,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112880461] [2024-11-09 05:03:49,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112880461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:49,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457317991] [2024-11-09 05:03:49,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:03:49,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:49,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:49,281 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:49,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:03:49,465 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:03:49,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:03:49,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-09 05:03:49,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:49,514 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 05:03:49,960 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 17 treesize of output 13 [2024-11-09 05:03:50,057 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 22 treesize of output 17 [2024-11-09 05:03:50,940 INFO L349 Elim1Store]: treesize reduction 19, result has 53.7 percent of original size [2024-11-09 05:03:50,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 40 [2024-11-09 05:03:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:50,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:51,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:51,708 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 103 treesize of output 61 [2024-11-09 05:03:51,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:03:51,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 119 [2024-11-09 05:03:51,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2024-11-09 05:03:52,582 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 05:03:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:03:52,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457317991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:52,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557256242] [2024-11-09 05:03:52,609 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:03:52,610 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:52,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:52,610 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:52,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:53,410 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:55,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5044#true' at error location [2024-11-09 05:03:55,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:55,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:55,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 48 [2024-11-09 05:03:55,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469328945] [2024-11-09 05:03:55,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:55,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 05:03:55,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 05:03:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3090, Unknown=10, NotChecked=0, Total=3306 [2024-11-09 05:03:55,033 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 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 05:04:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:01,083 INFO L93 Difference]: Finished difference Result 258 states and 288 transitions. [2024-11-09 05:04:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 05:04:01,083 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 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 30 [2024-11-09 05:04:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:01,084 INFO L225 Difference]: With dead ends: 258 [2024-11-09 05:04:01,084 INFO L226 Difference]: Without dead ends: 244 [2024-11-09 05:04:01,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=605, Invalid=8503, Unknown=12, NotChecked=0, Total=9120 [2024-11-09 05:04:01,087 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 230 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:01,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 705 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 05:04:01,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-11-09 05:04:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 184. [2024-11-09 05:04:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.1777777777777778) internal successors, (212), 183 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 05:04:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 212 transitions. [2024-11-09 05:04:01,100 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 212 transitions. Word has length 30 [2024-11-09 05:04:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:01,100 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 212 transitions. [2024-11-09 05:04:01,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 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 05:04:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 212 transitions. [2024-11-09 05:04:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 05:04:01,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:01,101 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:01,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 05:04:01,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:01,302 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:04:01,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:01,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1117281557, now seen corresponding path program 2 times [2024-11-09 05:04:01,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:01,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492194047] [2024-11-09 05:04:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:01,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:04:01,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:01,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492194047] [2024-11-09 05:04:01,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492194047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:01,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016263970] [2024-11-09 05:04:01,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:04:01,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:01,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:01,667 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:01,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:04:01,840 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:04:01,840 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:04:01,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 05:04:01,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:01,852 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 05:04:02,005 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 05:04:02,110 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 05:04:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:04:02,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:04:02,274 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_475 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_475) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)))) is different from false [2024-11-09 05:04:02,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:04:02,353 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 05:04:02,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:04:02,364 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 05:04:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 1 not checked. [2024-11-09 05:04:02,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016263970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:04:02,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790816792] [2024-11-09 05:04:02,520 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:04:02,520 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:04:02,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:04:02,521 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:04:02,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:04:03,874 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:04:05,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6008#(and (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_41| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_41| Int)) (and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_41|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_41|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_41|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-09 05:04:05,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:04:05,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:04:05,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 28 [2024-11-09 05:04:05,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876849294] [2024-11-09 05:04:05,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:04:05,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 05:04:05,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 05:04:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1913, Unknown=19, NotChecked=88, Total=2162 [2024-11-09 05:04:05,422 INFO L87 Difference]: Start difference. First operand 184 states and 212 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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 05:04:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:06,195 INFO L93 Difference]: Finished difference Result 268 states and 300 transitions. [2024-11-09 05:04:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 05:04:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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) Word has length 32 [2024-11-09 05:04:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:06,196 INFO L225 Difference]: With dead ends: 268 [2024-11-09 05:04:06,196 INFO L226 Difference]: Without dead ends: 197 [2024-11-09 05:04:06,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=302, Invalid=3714, Unknown=20, NotChecked=124, Total=4160 [2024-11-09 05:04:06,198 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:06,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 121 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 465 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2024-11-09 05:04:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-09 05:04:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 188. [2024-11-09 05:04:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 187 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 215 transitions. [2024-11-09 05:04:06,204 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 215 transitions. Word has length 32 [2024-11-09 05:04:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:06,205 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 215 transitions. [2024-11-09 05:04:06,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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 05:04:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 215 transitions. [2024-11-09 05:04:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 05:04:06,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:06,206 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:06,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 05:04:06,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 05:04:06,411 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:04:06,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1893433167, now seen corresponding path program 1 times [2024-11-09 05:04:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:06,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923797202] [2024-11-09 05:04:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:06,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:07,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:07,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923797202] [2024-11-09 05:04:07,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923797202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:07,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632221882] [2024-11-09 05:04:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:07,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:07,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:07,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:07,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 05:04:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:07,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 05:04:07,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:04:07,233 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 05:04:07,240 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 05:04:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:07,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:04:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:08,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632221882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:04:08,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1551498323] [2024-11-09 05:04:08,730 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:04:08,730 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:04:08,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:04:08,731 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:04:08,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:04:09,897 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:04:14,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6751#(and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (exists ((|v_#memory_int_203| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncat_~d~0#1.base_125| Int)) (and (not (= (select (select |v_#memory_int_203| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|)) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_125|) 1) (= |#memory_int| (store |v_#memory_int_203| |v_ULTIMATE.start_cstrncat_~d~0#1.base_125| (store (select |v_#memory_int_203| |v_ULTIMATE.start_cstrncat_~d~0#1.base_125|) (+ (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_125|) (- 1)) (select (select |v_#memory_int_203| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|))))) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_125|)))) (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-09 05:04:14,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:04:14,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:04:14,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-11-09 05:04:14,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183222052] [2024-11-09 05:04:14,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:04:14,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 05:04:14,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 05:04:14,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2738, Unknown=1, NotChecked=0, Total=2970 [2024-11-09 05:04:14,093 INFO L87 Difference]: Start difference. First operand 188 states and 215 transitions. Second operand has 38 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 38 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 05:04:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:17,405 INFO L93 Difference]: Finished difference Result 232 states and 260 transitions. [2024-11-09 05:04:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 05:04:17,406 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 38 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) Word has length 33 [2024-11-09 05:04:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:17,408 INFO L225 Difference]: With dead ends: 232 [2024-11-09 05:04:17,408 INFO L226 Difference]: Without dead ends: 213 [2024-11-09 05:04:17,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=364, Invalid=4057, Unknown=1, NotChecked=0, Total=4422 [2024-11-09 05:04:17,410 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 134 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:17,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 317 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 05:04:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-09 05:04:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 172. [2024-11-09 05:04:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 171 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2024-11-09 05:04:17,417 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 33 [2024-11-09 05:04:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:17,418 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2024-11-09 05:04:17,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 38 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 05:04:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2024-11-09 05:04:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:04:17,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:17,419 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:17,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 05:04:17,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 05:04:17,620 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:04:17,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash 858331717, now seen corresponding path program 7 times [2024-11-09 05:04:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:17,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973551465] [2024-11-09 05:04:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:17,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:04:19,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973551465] [2024-11-09 05:04:19,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973551465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842751828] [2024-11-09 05:04:19,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:04:19,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:19,346 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:19,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 05:04:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:19,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-09 05:04:19,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:19,506 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 05:04:19,887 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 17 treesize of output 13 [2024-11-09 05:04:20,041 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 22 treesize of output 17 [2024-11-09 05:04:23,009 INFO L349 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2024-11-09 05:04:23,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 71 [2024-11-09 05:04:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 05:04:23,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:04:25,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:04:25,667 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 129 treesize of output 73 [2024-11-09 05:04:25,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:04:25,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 136 treesize of output 163 [2024-11-09 05:04:25,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2024-11-09 05:04:25,834 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 17 treesize of output 13 [2024-11-09 05:04:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 05:04:26,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842751828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:04:26,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466457894] [2024-11-09 05:04:26,859 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-09 05:04:26,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:04:26,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:04:26,859 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:04:26,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:04:27,784 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:04:30,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7196#true' at error location [2024-11-09 05:04:30,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:04:30,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:04:30,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2024-11-09 05:04:30,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600490313] [2024-11-09 05:04:30,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:04:30,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 05:04:30,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 05:04:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 05:04:30,712 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 45 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 45 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 05:04:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:50,203 INFO L93 Difference]: Finished difference Result 270 states and 297 transitions. [2024-11-09 05:04:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 05:04:50,204 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 45 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) Word has length 35 [2024-11-09 05:04:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:50,205 INFO L225 Difference]: With dead ends: 270 [2024-11-09 05:04:50,205 INFO L226 Difference]: Without dead ends: 245 [2024-11-09 05:04:50,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=973, Invalid=7583, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 05:04:50,206 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 299 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:50,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 429 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-09 05:04:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-09 05:04:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 170. [2024-11-09 05:04:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 167 states have (on average 1.155688622754491) internal successors, (193), 169 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 193 transitions. [2024-11-09 05:04:50,212 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 193 transitions. Word has length 35 [2024-11-09 05:04:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:50,212 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 193 transitions. [2024-11-09 05:04:50,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 45 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 05:04:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 193 transitions. [2024-11-09 05:04:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 05:04:50,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:50,213 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:50,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 05:04:50,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 05:04:50,414 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:04:50,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1776929749, now seen corresponding path program 3 times [2024-11-09 05:04:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:50,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109484963] [2024-11-09 05:04:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:50,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:04:51,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:51,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109484963] [2024-11-09 05:04:51,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109484963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:51,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025452529] [2024-11-09 05:04:51,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:04:51,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:51,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:51,143 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:51,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 05:04:51,359 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:04:51,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:04:51,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 05:04:51,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:04:51,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:04:52,302 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 05:04:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:04:52,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025452529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:04:52,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869630695] [2024-11-09 05:04:52,644 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:04:52,644 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:04:52,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:04:52,645 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:04:52,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:04:53,612 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:04:56,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8220#(and (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|))' at error location [2024-11-09 05:04:56,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:04:56,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:04:56,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-09 05:04:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266358146] [2024-11-09 05:04:56,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:04:56,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 05:04:56,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 05:04:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 05:04:56,750 INFO L87 Difference]: Start difference. First operand 170 states and 193 transitions. Second operand has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 27 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 05:04:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:57,566 INFO L93 Difference]: Finished difference Result 196 states and 217 transitions. [2024-11-09 05:04:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:04:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 27 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) Word has length 38 [2024-11-09 05:04:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:57,568 INFO L225 Difference]: With dead ends: 196 [2024-11-09 05:04:57,568 INFO L226 Difference]: Without dead ends: 196 [2024-11-09 05:04:57,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 05:04:57,569 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:57,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 183 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:04:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-09 05:04:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2024-11-09 05:04:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 188 states have (on average 1.1436170212765957) internal successors, (215), 190 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 215 transitions. [2024-11-09 05:04:57,576 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 215 transitions. Word has length 38 [2024-11-09 05:04:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:57,576 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 215 transitions. [2024-11-09 05:04:57,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 27 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 05:04:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 215 transitions. [2024-11-09 05:04:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 05:04:57,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:57,578 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:57,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 05:04:57,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:57,778 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:04:57,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash -2044566152, now seen corresponding path program 1 times [2024-11-09 05:04:57,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:57,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833054503] [2024-11-09 05:04:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:57,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:04:59,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833054503] [2024-11-09 05:04:59,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833054503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561516628] [2024-11-09 05:04:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:59,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:59,483 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:59,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 05:04:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:59,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 05:04:59,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:05:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:05:00,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:05:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:05:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561516628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:05:02,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534901643] [2024-11-09 05:05:02,711 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:05:02,712 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:05:02,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:05:02,712 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:05:02,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:05:03,673 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:05:09,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8913#(and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.base_162| Int) (|v_#memory_int_259| (Array Int (Array Int Int)))) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_162|)) (= |#memory_int| (store |v_#memory_int_259| |v_ULTIMATE.start_cstrncat_~d~0#1.base_162| (store (select |v_#memory_int_259| |v_ULTIMATE.start_cstrncat_~d~0#1.base_162|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_162|)) (select (select |v_#memory_int_259| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|))))) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_162|) 1) (not (= (select (select |v_#memory_int_259| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|)) 0)))) (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-09 05:05:09,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:05:09,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:05:09,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 43 [2024-11-09 05:05:09,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529447156] [2024-11-09 05:05:09,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:05:09,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 05:05:09,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:05:09,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 05:05:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3309, Unknown=1, NotChecked=0, Total=3540 [2024-11-09 05:05:09,436 INFO L87 Difference]: Start difference. First operand 191 states and 215 transitions. Second operand has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 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 05:05:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:05:15,946 INFO L93 Difference]: Finished difference Result 251 states and 278 transitions. [2024-11-09 05:05:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 05:05:15,948 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 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 41 [2024-11-09 05:05:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:05:15,949 INFO L225 Difference]: With dead ends: 251 [2024-11-09 05:05:15,949 INFO L226 Difference]: Without dead ends: 251 [2024-11-09 05:05:15,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=472, Invalid=6007, Unknown=1, NotChecked=0, Total=6480 [2024-11-09 05:05:15,951 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:05:15,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 436 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-09 05:05:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-09 05:05:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2024-11-09 05:05:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 245 states have (on average 1.1346938775510205) internal successors, (278), 247 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:05:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 278 transitions. [2024-11-09 05:05:15,958 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 278 transitions. Word has length 41 [2024-11-09 05:05:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:05:15,959 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 278 transitions. [2024-11-09 05:05:15,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 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 05:05:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 278 transitions. [2024-11-09 05:05:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 05:05:15,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:05:15,960 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:05:15,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 05:05:16,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:16,161 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:05:16,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:05:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2027976571, now seen corresponding path program 1 times [2024-11-09 05:05:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:05:16,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893591131] [2024-11-09 05:05:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:16,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:05:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:05:17,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:05:17,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893591131] [2024-11-09 05:05:17,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893591131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:05:17,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840450151] [2024-11-09 05:05:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:17,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:17,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:05:17,019 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:05:17,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 05:05:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:17,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 05:05:17,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:05:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:05:18,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:05:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:05:19,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840450151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:05:19,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1712507922] [2024-11-09 05:05:19,470 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:05:19,470 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:05:19,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:05:19,471 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:05:19,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:05:20,441 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:05:23,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9754#(and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.offset_175| Int) (|v_ULTIMATE.start_cstrncat_~d~0#1.base_175| Int)) (and (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_175|) (<= (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_175|) |v_ULTIMATE.start_cstrncat_~d~0#1.offset_175|))) (= |ULTIMATE.start_cstrncat_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|))) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-09 05:05:23,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:05:23,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:05:23,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2024-11-09 05:05:23,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384809155] [2024-11-09 05:05:23,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:05:23,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:05:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:05:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:05:23,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 05:05:23,968 INFO L87 Difference]: Start difference. First operand 248 states and 278 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 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 05:05:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:05:24,853 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2024-11-09 05:05:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:05:24,853 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 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) Word has length 43 [2024-11-09 05:05:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:05:24,854 INFO L225 Difference]: With dead ends: 212 [2024-11-09 05:05:24,854 INFO L226 Difference]: Without dead ends: 179 [2024-11-09 05:05:24,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=304, Invalid=2146, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 05:05:24,856 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:05:24,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 134 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:05:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-09 05:05:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2024-11-09 05:05:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 176 states have (on average 1.1420454545454546) internal successors, (201), 178 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:05:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2024-11-09 05:05:24,861 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 43 [2024-11-09 05:05:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:05:24,862 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2024-11-09 05:05:24,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 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 05:05:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2024-11-09 05:05:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 05:05:24,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:05:24,863 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:05:24,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 05:05:25,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:25,064 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:05:25,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:05:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1529947556, now seen corresponding path program 2 times [2024-11-09 05:05:25,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:05:25,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756074020] [2024-11-09 05:05:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:25,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:05:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:28,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:05:28,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756074020] [2024-11-09 05:05:28,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756074020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:05:28,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533784535] [2024-11-09 05:05:28,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:05:28,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:28,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:05:28,756 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:05:28,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 05:05:28,959 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 05:05:28,959 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:05:28,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-09 05:05:28,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:05:29,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 05:05:31,460 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 16 treesize of output 12 [2024-11-09 05:05:31,800 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 50 treesize of output 43 [2024-11-09 05:05:35,034 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-11-09 05:05:35,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 34 [2024-11-09 05:05:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:35,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:05:37,581 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_734 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_734) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= 0 (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2024-11-09 05:05:37,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:05:37,608 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 105 treesize of output 63 [2024-11-09 05:05:37,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:05:37,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 121 [2024-11-09 05:05:37,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:05:37,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 29 [2024-11-09 05:05:42,128 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 05:05:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 23 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:05:42,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533784535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:05:42,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104661623] [2024-11-09 05:05:42,147 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:05:42,147 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:05:42,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:05:42,148 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:05:42,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:05:43,100 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:05:52,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10494#(and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.base_192| Int) (|v_#memory_int_300| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_300| |v_ULTIMATE.start_cstrncat_~d~0#1.base_192| (store (select |v_#memory_int_300| |v_ULTIMATE.start_cstrncat_~d~0#1.base_192|) (+ (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_192|) (- 1)) (select (select |v_#memory_int_300| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|))))) (not (= (select (select |v_#memory_int_300| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|)) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_192|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_192|)))) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-09 05:05:52,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:05:52,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:05:52,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 62 [2024-11-09 05:05:52,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172746818] [2024-11-09 05:05:52,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:05:52,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-09 05:05:52,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:05:52,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-09 05:05:52,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=5837, Unknown=2, NotChecked=154, Total=6320 [2024-11-09 05:05:52,151 INFO L87 Difference]: Start difference. First operand 179 states and 201 transitions. Second operand has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:18,066 INFO L93 Difference]: Finished difference Result 260 states and 288 transitions. [2024-11-09 05:06:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 05:06:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-09 05:06:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:18,068 INFO L225 Difference]: With dead ends: 260 [2024-11-09 05:06:18,068 INFO L226 Difference]: Without dead ends: 246 [2024-11-09 05:06:18,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3958 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=866, Invalid=13656, Unknown=2, NotChecked=238, Total=14762 [2024-11-09 05:06:18,070 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 151 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 2852 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:18,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 647 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2852 Invalid, 0 Unknown, 118 Unchecked, 11.4s Time] [2024-11-09 05:06:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-09 05:06:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 196. [2024-11-09 05:06:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 193 states have (on average 1.145077720207254) internal successors, (221), 195 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 221 transitions. [2024-11-09 05:06:18,076 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 221 transitions. Word has length 45 [2024-11-09 05:06:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:18,077 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 221 transitions. [2024-11-09 05:06:18,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 221 transitions. [2024-11-09 05:06:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:06:18,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:18,078 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:18,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 05:06:18,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:18,279 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:06:18,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash 755877896, now seen corresponding path program 2 times [2024-11-09 05:06:18,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116987205] [2024-11-09 05:06:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:18,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:06:21,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:21,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116987205] [2024-11-09 05:06:21,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116987205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:21,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352521668] [2024-11-09 05:06:21,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:06:21,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:21,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:21,544 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:21,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 05:06:21,847 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:06:21,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:06:21,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 05:06:21,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:22,059 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 05:06:22,107 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 05:06:25,253 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 21 treesize of output 17 [2024-11-09 05:06:25,648 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 26 treesize of output 21 [2024-11-09 05:06:27,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:06:27,028 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 25 treesize of output 24 [2024-11-09 05:06:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:06:29,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:33,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:06:33,316 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 24 treesize of output 25 [2024-11-09 05:06:33,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:06:33,354 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 36 treesize of output 35 [2024-11-09 05:06:33,368 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 9 treesize of output 7 [2024-11-09 05:06:37,505 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 05:06:37,526 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 05:06:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:06:37,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352521668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:37,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139834759] [2024-11-09 05:06:37,738 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:06:37,738 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:37,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:37,738 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:37,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:38,807 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:47,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11377#(and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1) (exists ((|v_#memory_int_323| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncat_~d~0#1.base_210| Int)) (and (not (= (select (select |v_#memory_int_323| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|)) 0)) (= |#memory_int| (store |v_#memory_int_323| |v_ULTIMATE.start_cstrncat_~d~0#1.base_210| (store (select |v_#memory_int_323| |v_ULTIMATE.start_cstrncat_~d~0#1.base_210|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_210|)) (select (select |v_#memory_int_323| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|))))) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_210|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_210|)))))' at error location [2024-11-09 05:06:47,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:47,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:47,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2024-11-09 05:06:47,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003568635] [2024-11-09 05:06:47,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:47,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-09 05:06:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-09 05:06:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=4921, Unknown=1, NotChecked=0, Total=5256 [2024-11-09 05:06:47,481 INFO L87 Difference]: Start difference. First operand 196 states and 221 transitions. Second operand has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 55 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:07:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:06,343 INFO L93 Difference]: Finished difference Result 256 states and 287 transitions. [2024-11-09 05:07:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 05:07:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 55 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-09 05:07:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:06,344 INFO L225 Difference]: With dead ends: 256 [2024-11-09 05:07:06,344 INFO L226 Difference]: Without dead ends: 247 [2024-11-09 05:07:06,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=1033, Invalid=11622, Unknown=1, NotChecked=0, Total=12656 [2024-11-09 05:07:06,347 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 346 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:06,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 323 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-09 05:07:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-09 05:07:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 218. [2024-11-09 05:07:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 215 states have (on average 1.1534883720930234) internal successors, (248), 217 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:07:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 248 transitions. [2024-11-09 05:07:06,354 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 248 transitions. Word has length 46 [2024-11-09 05:07:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:06,354 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 248 transitions. [2024-11-09 05:07:06,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 55 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:07:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 248 transitions. [2024-11-09 05:07:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:07:06,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:06,356 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:07:06,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 05:07:06,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 05:07:06,557 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:07:06,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1539133072, now seen corresponding path program 4 times [2024-11-09 05:07:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:06,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880130930] [2024-11-09 05:07:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:07:08,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:07:08,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880130930] [2024-11-09 05:07:08,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880130930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:07:08,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996969358] [2024-11-09 05:07:08,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:07:08,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:07:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:07:08,143 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:07:08,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 05:07:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:08,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 05:07:08,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:07:08,362 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 05:07:09,226 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 05:07:09,673 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 05:07:09,877 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 05:07:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:07:10,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:07:10,353 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_844 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_844) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2024-11-09 05:07:11,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:07:11,304 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 05:07:11,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:07:11,352 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 05:07:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 4 not checked. [2024-11-09 05:07:12,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996969358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:07:12,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396128483] [2024-11-09 05:07:12,054 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:07:12,054 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:07:12,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:07:12,055 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:07:12,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:07:13,332 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:07:19,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12253#(and (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|))' at error location [2024-11-09 05:07:19,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:07:19,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:07:19,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2024-11-09 05:07:19,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339720577] [2024-11-09 05:07:19,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:07:19,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 05:07:19,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:07:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 05:07:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2357, Unknown=36, NotChecked=98, Total=2652 [2024-11-09 05:07:19,195 INFO L87 Difference]: Start difference. First operand 218 states and 248 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:07:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:27,888 INFO L93 Difference]: Finished difference Result 418 states and 453 transitions. [2024-11-09 05:07:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 05:07:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-09 05:07:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:27,889 INFO L225 Difference]: With dead ends: 418 [2024-11-09 05:07:27,889 INFO L226 Difference]: Without dead ends: 268 [2024-11-09 05:07:27,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=447, Invalid=5994, Unknown=43, NotChecked=158, Total=6642 [2024-11-09 05:07:27,890 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:27,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 243 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 913 Invalid, 0 Unknown, 119 Unchecked, 3.5s Time] [2024-11-09 05:07:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-09 05:07:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 254. [2024-11-09 05:07:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 251 states have (on average 1.1394422310756973) internal successors, (286), 253 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 05:07:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 286 transitions. [2024-11-09 05:07:27,898 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 286 transitions. Word has length 46 [2024-11-09 05:07:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:27,898 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 286 transitions. [2024-11-09 05:07:27,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:07:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 286 transitions. [2024-11-09 05:07:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 05:07:27,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:27,899 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:07:27,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 05:07:28,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:07:28,100 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:07:28,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1824462853, now seen corresponding path program 3 times [2024-11-09 05:07:28,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:28,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213686492] [2024-11-09 05:07:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:28,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:07:30,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:07:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213686492] [2024-11-09 05:07:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213686492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:07:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400224137] [2024-11-09 05:07:30,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:07:30,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:07:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:07:30,923 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:07:30,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 05:07:31,235 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:07:31,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:07:31,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-09 05:07:31,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:07:31,340 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-09 05:07:31,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 05:07:31,379 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 05:07:35,479 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 15 treesize of output 11 [2024-11-09 05:07:35,773 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 20 treesize of output 15 [2024-11-09 05:07:38,898 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-09 05:07:38,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 39 [2024-11-09 05:07:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:07:39,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:07:43,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:07:43,964 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 105 treesize of output 63 [2024-11-09 05:07:44,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:07:44,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 121 [2024-11-09 05:07:44,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-11-09 05:07:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 1 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:07:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400224137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:07:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127193912] [2024-11-09 05:07:52,044 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:07:52,044 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:07:52,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:07:52,045 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:07:52,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:07:53,055 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:08:03,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13355#(and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.base_240| Int) (|v_#memory_int_372| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_372| |v_ULTIMATE.start_cstrncat_~d~0#1.base_240| (store (select |v_#memory_int_372| |v_ULTIMATE.start_cstrncat_~d~0#1.base_240|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_240|)) (select (select |v_#memory_int_372| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|))))) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_240|)) (= 1 (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_240|)) (not (= (select (select |v_#memory_int_372| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|)) 0)))) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-09 05:08:03,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:08:03,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:08:03,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 25] total 68 [2024-11-09 05:08:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165751255] [2024-11-09 05:08:03,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:08:03,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-09 05:08:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:08:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-09 05:08:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=6775, Unknown=2, NotChecked=0, Total=7310 [2024-11-09 05:08:03,522 INFO L87 Difference]: Start difference. First operand 254 states and 286 transitions. Second operand has 69 states, 68 states have (on average 2.088235294117647) internal successors, (142), 69 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 05:08:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:08:25,797 INFO L93 Difference]: Finished difference Result 552 states and 608 transitions. [2024-11-09 05:08:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 05:08:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.088235294117647) internal successors, (142), 69 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) Word has length 48 [2024-11-09 05:08:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:08:25,799 INFO L225 Difference]: With dead ends: 552 [2024-11-09 05:08:25,799 INFO L226 Difference]: Without dead ends: 521 [2024-11-09 05:08:25,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4697 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=1132, Invalid=14118, Unknown=2, NotChecked=0, Total=15252 [2024-11-09 05:08:25,802 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 454 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 2788 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:08:25,802 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 563 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2788 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2024-11-09 05:08:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-11-09 05:08:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 370. [2024-11-09 05:08:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 367 states have (on average 1.1307901907356948) internal successors, (415), 369 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:08:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 415 transitions. [2024-11-09 05:08:25,824 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 415 transitions. Word has length 48 [2024-11-09 05:08:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:08:25,825 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 415 transitions. [2024-11-09 05:08:25,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.088235294117647) internal successors, (142), 69 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 05:08:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 415 transitions. [2024-11-09 05:08:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:08:25,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:08:25,828 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:08:25,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 05:08:26,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 05:08:26,029 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:08:26,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:08:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash -985440094, now seen corresponding path program 4 times [2024-11-09 05:08:26,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:08:26,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561576836] [2024-11-09 05:08:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:08:26,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:08:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:08:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:08:32,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:08:32,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561576836] [2024-11-09 05:08:32,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561576836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:08:32,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281980350] [2024-11-09 05:08:32,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:08:32,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:08:32,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:08:32,505 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:08:32,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 05:08:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:08:32,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-09 05:08:32,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:08:32,814 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 05:08:36,876 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 16 treesize of output 12 [2024-11-09 05:08:37,181 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 21 treesize of output 16 [2024-11-09 05:09:01,840 INFO L349 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2024-11-09 05:09:01,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 42 [2024-11-09 05:09:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 28 proven. 62 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:09:02,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:09:15,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:09:15,318 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 131 treesize of output 75 [2024-11-09 05:09:15,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:09:15,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 150 [2024-11-09 05:09:15,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:09:15,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 36 [2024-11-09 05:09:23,489 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 05:09:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 33 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:09:23,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281980350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:09:23,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280295384] [2024-11-09 05:09:23,556 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:09:23,556 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:09:23,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:09:23,556 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:09:23,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:09:24,564 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:09:40,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14738#(and (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.base_261| Int) (|v_#memory_int_394| (Array Int (Array Int Int)))) (and (not (= (select (select |v_#memory_int_394| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0) 0)) (= |#memory_int| (store |v_#memory_int_394| |v_ULTIMATE.start_cstrncat_~d~0#1.base_261| (store (select |v_#memory_int_394| |v_ULTIMATE.start_cstrncat_~d~0#1.base_261|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_261|)) (select (select |v_#memory_int_394| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0)))) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_261|)) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_261|) 1) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-09 05:09:40,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:09:40,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:09:40,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2024-11-09 05:09:40,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810802426] [2024-11-09 05:09:40,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:09:40,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-09 05:09:40,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:09:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-09 05:09:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=7935, Unknown=17, NotChecked=0, Total=8372 [2024-11-09 05:09:40,489 INFO L87 Difference]: Start difference. First operand 370 states and 415 transitions. Second operand has 74 states, 74 states have (on average 1.864864864864865) internal successors, (138), 73 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:10:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:10:14,745 INFO L93 Difference]: Finished difference Result 410 states and 452 transitions. [2024-11-09 05:10:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-09 05:10:14,745 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.864864864864865) internal successors, (138), 73 states have internal predecessors, (138), 0 states have call successors, (0), 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 50 [2024-11-09 05:10:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:10:14,746 INFO L225 Difference]: With dead ends: 410 [2024-11-09 05:10:14,746 INFO L226 Difference]: Without dead ends: 394 [2024-11-09 05:10:14,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 74 SyntacticMatches, 13 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 5411 ImplicationChecksByTransitivity, 84.2s TimeCoverageRelationStatistics Valid=1221, Invalid=18222, Unknown=17, NotChecked=0, Total=19460 [2024-11-09 05:10:14,747 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 3682 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 3702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:10:14,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 863 Invalid, 3702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3682 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2024-11-09 05:10:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-11-09 05:10:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 348. [2024-11-09 05:10:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 345 states have (on average 1.1304347826086956) internal successors, (390), 347 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:10:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 390 transitions. [2024-11-09 05:10:14,755 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 390 transitions. Word has length 50 [2024-11-09 05:10:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:10:14,755 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 390 transitions. [2024-11-09 05:10:14,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.864864864864865) internal successors, (138), 73 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:10:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 390 transitions. [2024-11-09 05:10:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 05:10:14,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:10:14,756 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:10:14,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 05:10:14,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 05:10:14,957 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:10:14,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:10:14,958 INFO L85 PathProgramCache]: Analyzing trace with hash 528848848, now seen corresponding path program 5 times [2024-11-09 05:10:14,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:10:14,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777306406] [2024-11-09 05:10:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:10:14,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:10:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:10:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 05:10:16,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:10:16,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777306406] [2024-11-09 05:10:16,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777306406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:10:16,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744740403] [2024-11-09 05:10:16,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:10:16,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:10:16,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:10:16,657 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:10:16,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 05:10:16,891 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:10:16,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:10:16,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 05:10:16,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:10:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 05:10:18,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:10:19,650 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 05:10:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 05:10:20,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744740403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:10:20,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692179841] [2024-11-09 05:10:20,077 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:10:20,077 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:10:20,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:10:20,077 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:10:20,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:10:21,100 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:10:26,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15951#(and (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|))' at error location [2024-11-09 05:10:26,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:10:26,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:10:26,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-11-09 05:10:26,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153205032] [2024-11-09 05:10:26,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:10:26,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 05:10:26,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:10:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 05:10:26,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2079, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 05:10:26,674 INFO L87 Difference]: Start difference. First operand 348 states and 390 transitions. Second operand has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:10:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:10:29,927 INFO L93 Difference]: Finished difference Result 372 states and 408 transitions. [2024-11-09 05:10:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:10:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-09 05:10:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:10:29,929 INFO L225 Difference]: With dead ends: 372 [2024-11-09 05:10:29,930 INFO L226 Difference]: Without dead ends: 372 [2024-11-09 05:10:29,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=221, Invalid=2431, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:10:29,931 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:10:29,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 303 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 05:10:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-11-09 05:10:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 364. [2024-11-09 05:10:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 361 states have (on average 1.1218836565096952) internal successors, (405), 363 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:10:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 405 transitions. [2024-11-09 05:10:29,940 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 405 transitions. Word has length 52 [2024-11-09 05:10:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:10:29,940 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 405 transitions. [2024-11-09 05:10:29,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:10:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 405 transitions. [2024-11-09 05:10:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 05:10:29,942 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:10:29,942 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:10:29,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-09 05:10:30,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 05:10:30,143 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:10:30,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:10:30,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1460438185, now seen corresponding path program 2 times [2024-11-09 05:10:30,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:10:30,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452823699] [2024-11-09 05:10:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:10:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:10:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:10:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:10:34,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:10:34,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452823699] [2024-11-09 05:10:34,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452823699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:10:34,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946397270] [2024-11-09 05:10:34,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:10:34,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:10:34,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:10:34,644 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:10:34,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 05:10:35,032 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:10:35,033 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:10:35,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-09 05:10:35,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:10:35,059 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 05:10:38,180 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 16 treesize of output 12 [2024-11-09 05:10:38,486 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 21 treesize of output 16 [2024-11-09 05:10:40,474 INFO L349 Elim1Store]: treesize reduction 4, result has 86.7 percent of original size [2024-11-09 05:10:40,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2024-11-09 05:10:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 05:10:44,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:10:50,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:10:50,524 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 51 treesize of output 37 [2024-11-09 05:10:50,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:10:50,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 74 [2024-11-09 05:10:50,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:10:50,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-09 05:10:56,471 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 80 treesize of output 70 [2024-11-09 05:10:59,902 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 05:11:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:11:00,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946397270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:11:00,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [451492813] [2024-11-09 05:11:00,281 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:11:00,281 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:11:00,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:11:00,281 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:11:00,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:11:01,155 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:11:12,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17095#(and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_128| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_127| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_128|) (= |ULTIMATE.start_cstrncat_#t~mem5#1| (select (select |#memory_int| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_127|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_128|)) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_128| 1) (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_127|)) (= (select |#valid| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_127|) 1))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-09 05:11:12,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:11:12,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:11:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 24] total 71 [2024-11-09 05:11:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899828249] [2024-11-09 05:11:12,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:11:12,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-09 05:11:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:11:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-09 05:11:12,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=7509, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 05:11:12,942 INFO L87 Difference]: Start difference. First operand 364 states and 405 transitions. Second operand has 72 states, 72 states have (on average 1.9166666666666667) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:11:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:11:49,972 INFO L93 Difference]: Finished difference Result 406 states and 445 transitions. [2024-11-09 05:11:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-09 05:11:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9166666666666667) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 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 53 [2024-11-09 05:11:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:11:49,974 INFO L225 Difference]: With dead ends: 406 [2024-11-09 05:11:49,974 INFO L226 Difference]: Without dead ends: 355 [2024-11-09 05:11:49,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7022 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=1753, Invalid=21503, Unknown=0, NotChecked=0, Total=23256 [2024-11-09 05:11:49,976 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 256 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:11:49,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 244 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2024-11-09 05:11:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-09 05:11:49,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 322. [2024-11-09 05:11:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 319 states have (on average 1.1316614420062696) internal successors, (361), 321 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:11:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 361 transitions. [2024-11-09 05:11:49,984 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 361 transitions. Word has length 53 [2024-11-09 05:11:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:11:49,984 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 361 transitions. [2024-11-09 05:11:49,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9166666666666667) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:11:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 361 transitions. [2024-11-09 05:11:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 05:11:49,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:11:49,985 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:11:50,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 05:11:50,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 05:11:50,186 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:11:50,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:11:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash -550339413, now seen corresponding path program 5 times [2024-11-09 05:11:50,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:11:50,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541708130] [2024-11-09 05:11:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:11:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:11:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:11:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 35 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:11:53,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:11:53,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541708130] [2024-11-09 05:11:53,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541708130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:11:53,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572291358] [2024-11-09 05:11:53,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:11:53,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:11:53,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:11:53,657 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:11:53,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 05:11:53,954 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 05:11:53,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:11:53,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-09 05:11:53,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:11:54,194 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-09 05:11:54,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 05:11:54,247 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 05:11:56,758 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 21 treesize of output 17 [2024-11-09 05:11:57,082 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 26 treesize of output 21 [2024-11-09 05:12:01,800 INFO L224 Elim1Store]: Index analysis took 117 ms [2024-11-09 05:12:02,502 INFO L349 Elim1Store]: treesize reduction 16, result has 90.4 percent of original size [2024-11-09 05:12:02,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 172 [2024-11-09 05:12:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 05:12:05,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:12:15,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:12:15,049 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 121 treesize of output 65 [2024-11-09 05:12:15,168 INFO L224 Elim1Store]: Index analysis took 103 ms [2024-11-09 05:12:15,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:12:15,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 120 treesize of output 235 [2024-11-09 05:12:15,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:12:15,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 116 [2024-11-09 05:12:22,761 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 05:12:22,784 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 05:12:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 05:12:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572291358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:12:23,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807448840] [2024-11-09 05:12:23,142 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:12:23,142 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:12:23,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:12:23,143 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:12:23,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:12:24,194 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:12:38,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18345#(and (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.base_314| Int) (|v_#memory_int_463| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_314|) 1) (= |#memory_int| (store |v_#memory_int_463| |v_ULTIMATE.start_cstrncat_~d~0#1.base_314| (store (select |v_#memory_int_463| |v_ULTIMATE.start_cstrncat_~d~0#1.base_314|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_314|)) (select (select |v_#memory_int_463| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0)))) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (not (= (select (select |v_#memory_int_463| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0) 0)) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_314|)))) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-09 05:12:38,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:12:38,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:12:38,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 65 [2024-11-09 05:12:38,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70696942] [2024-11-09 05:12:38,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:12:38,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-09 05:12:38,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:12:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-09 05:12:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=6491, Unknown=2, NotChecked=0, Total=6972 [2024-11-09 05:12:38,183 INFO L87 Difference]: Start difference. First operand 322 states and 361 transitions. Second operand has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 66 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:13:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:13:21,095 INFO L93 Difference]: Finished difference Result 625 states and 688 transitions. [2024-11-09 05:13:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-09 05:13:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 66 states have internal predecessors, (125), 0 states have call successors, (0), 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 53 [2024-11-09 05:13:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:13:21,097 INFO L225 Difference]: With dead ends: 625 [2024-11-09 05:13:21,097 INFO L226 Difference]: Without dead ends: 587 [2024-11-09 05:13:21,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7758 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=2129, Invalid=23951, Unknown=2, NotChecked=0, Total=26082 [2024-11-09 05:13:21,099 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 676 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:13:21,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 612 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2024-11-09 05:13:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2024-11-09 05:13:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 412. [2024-11-09 05:13:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 409 states have (on average 1.1271393643031784) internal successors, (461), 411 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:13:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 461 transitions. [2024-11-09 05:13:21,110 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 461 transitions. Word has length 53 [2024-11-09 05:13:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:13:21,110 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 461 transitions. [2024-11-09 05:13:21,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 66 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:13:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 461 transitions. [2024-11-09 05:13:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 05:13:21,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:13:21,112 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:13:21,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 05:13:21,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 05:13:21,313 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:13:21,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:13:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1168717286, now seen corresponding path program 3 times [2024-11-09 05:13:21,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:13:21,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103349895] [2024-11-09 05:13:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:13:21,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:13:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:13:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:13:27,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:13:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103349895] [2024-11-09 05:13:27,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103349895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:13:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886514175] [2024-11-09 05:13:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:13:27,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:13:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:13:27,351 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:13:27,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 05:13:27,688 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:13:27,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:13:27,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-09 05:13:27,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:13:27,732 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 05:13:31,480 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 17 treesize of output 13 [2024-11-09 05:13:31,820 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 22 treesize of output 17 [2024-11-09 05:13:44,993 INFO L349 Elim1Store]: treesize reduction 8, result has 74.2 percent of original size [2024-11-09 05:13:44,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 37 [2024-11-09 05:13:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 85 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:13:46,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:13:52,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:13:52,009 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 79 treesize of output 51 [2024-11-09 05:13:52,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:13:52,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 92 [2024-11-09 05:13:52,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:13:52,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 22 [2024-11-09 05:14:00,870 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 05:14:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:14:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886514175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:14:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [563373621] [2024-11-09 05:14:01,263 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:14:01,263 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:14:01,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:14:01,263 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:14:01,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:14:02,605 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:14:15,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19962#(and (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1) (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.base_336| Int) (|v_#memory_int_488| (Array Int (Array Int Int)))) (and (not (= (select (select |v_#memory_int_488| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|)) 0)) (= |#memory_int| (store |v_#memory_int_488| |v_ULTIMATE.start_cstrncat_~d~0#1.base_336| (store (select |v_#memory_int_488| |v_ULTIMATE.start_cstrncat_~d~0#1.base_336|) (+ (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_336|) (- 1)) (select (select |v_#memory_int_488| |ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncat_~s~0#1.offset|))))) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_336|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_336|)))))' at error location [2024-11-09 05:14:15,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:14:15,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:14:15,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2024-11-09 05:14:15,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819400196] [2024-11-09 05:14:15,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:14:15,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-09 05:14:15,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:14:15,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-09 05:14:15,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=7997, Unknown=6, NotChecked=0, Total=8556 [2024-11-09 05:14:15,339 INFO L87 Difference]: Start difference. First operand 412 states and 461 transitions. Second operand has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:14:37,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:14:40,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:14:43,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:14:48,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:14:53,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:15:01,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:15:05,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:15:08,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:15:11,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:15:21,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:15:27,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:15:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:28,829 INFO L93 Difference]: Finished difference Result 446 states and 492 transitions. [2024-11-09 05:15:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-09 05:15:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-09 05:15:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:28,832 INFO L225 Difference]: With dead ends: 446 [2024-11-09 05:15:28,832 INFO L226 Difference]: Without dead ends: 418 [2024-11-09 05:15:28,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5064 ImplicationChecksByTransitivity, 78.8s TimeCoverageRelationStatistics Valid=1267, Invalid=17628, Unknown=11, NotChecked=0, Total=18906 [2024-11-09 05:15:28,834 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 148 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 3248 mSolverCounterSat, 39 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3248 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:28,835 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 414 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3248 Invalid, 10 Unknown, 0 Unchecked, 38.5s Time] [2024-11-09 05:15:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2024-11-09 05:15:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 374. [2024-11-09 05:15:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 371 states have (on average 1.1320754716981132) internal successors, (420), 373 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 420 transitions. [2024-11-09 05:15:28,844 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 420 transitions. Word has length 56 [2024-11-09 05:15:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:28,844 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 420 transitions. [2024-11-09 05:15:28,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 420 transitions. [2024-11-09 05:15:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 05:15:28,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:28,846 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:28,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-09 05:15:29,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:29,047 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:15:29,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash -603390476, now seen corresponding path program 6 times [2024-11-09 05:15:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:29,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330510239] [2024-11-09 05:15:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:15:31,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:31,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330510239] [2024-11-09 05:15:31,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330510239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:15:31,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845920774] [2024-11-09 05:15:31,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:15:31,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:31,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:15:31,295 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:15:31,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 05:15:31,665 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:15:31,665 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:15:31,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-09 05:15:31,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:15:31,686 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 05:15:33,052 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 05:15:33,634 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 05:15:33,912 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 05:15:34,180 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 05:15:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 05:15:34,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:15:34,815 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1253 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1253) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2024-11-09 05:15:34,848 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1253 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1253) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 05:15:34,916 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1253 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1253) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) is different from false [2024-11-09 05:15:34,985 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1253 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1253) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 3)) 0)) is different from false [2024-11-09 05:15:35,033 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1253 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_1253) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 3 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2024-11-09 05:15:35,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:15:35,060 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 05:15:35,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:15:35,097 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 05:15:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 26 not checked. [2024-11-09 05:15:36,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845920774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:15:36,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503295107] [2024-11-09 05:15:36,050 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:15:36,050 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:15:36,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:15:36,051 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:15:36,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:15:37,159 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:15:45,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21265#(and (<= 0 |ULTIMATE.start_cstrncat_~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|))' at error location [2024-11-09 05:15:45,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:15:45,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:15:45,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2024-11-09 05:15:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322315487] [2024-11-09 05:15:45,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:15:45,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 05:15:45,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:15:45,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 05:15:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2489, Unknown=5, NotChecked=520, Total=3192 [2024-11-09 05:15:45,204 INFO L87 Difference]: Start difference. First operand 374 states and 420 transitions. Second operand has 40 states, 40 states have (on average 2.85) internal successors, (114), 40 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:57,894 INFO L93 Difference]: Finished difference Result 675 states and 734 transitions. [2024-11-09 05:15:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 05:15:57,895 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.85) internal successors, (114), 40 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-09 05:15:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:57,897 INFO L225 Difference]: With dead ends: 675 [2024-11-09 05:15:57,897 INFO L226 Difference]: Without dead ends: 465 [2024-11-09 05:15:57,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=523, Invalid=6974, Unknown=5, NotChecked=870, Total=8372 [2024-11-09 05:15:57,899 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 91 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:57,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 244 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 984 Invalid, 0 Unknown, 671 Unchecked, 4.8s Time] [2024-11-09 05:15:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-09 05:15:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 434. [2024-11-09 05:15:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 431 states have (on average 1.1299303944315546) internal successors, (487), 433 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 487 transitions. [2024-11-09 05:15:57,910 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 487 transitions. Word has length 57 [2024-11-09 05:15:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:57,911 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 487 transitions. [2024-11-09 05:15:57,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.85) internal successors, (114), 40 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 487 transitions. [2024-11-09 05:15:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 05:15:57,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:57,913 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:57,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 05:15:58,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-09 05:15:58,113 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 05:15:58,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:58,114 INFO L85 PathProgramCache]: Analyzing trace with hash 104604444, now seen corresponding path program 4 times [2024-11-09 05:15:58,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:58,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166833851] [2024-11-09 05:15:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:58,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 27 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:16:10,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166833851] [2024-11-09 05:16:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166833851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792460377] [2024-11-09 05:16:10,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:16:10,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:10,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:10,103 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:10,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12ec3459-7502-40fe-9213-804273b53e13/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 05:16:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:10,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-09 05:16:10,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:10,734 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 10 treesize of output 8 [2024-11-09 05:16:16,830 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 16 treesize of output 12 [2024-11-09 05:16:17,214 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 21 treesize of output 16 [2024-11-09 05:16:21,925 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-09 05:16:21,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 39 [2024-11-09 05:16:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:16:23,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:16:31,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:16:31,567 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 105 treesize of output 63 [2024-11-09 05:16:31,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:16:31,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 121 [2024-11-09 05:16:31,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:16:31,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 29 [2024-11-09 05:16:44,471 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 05:16:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 29 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:16:45,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792460377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:16:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393064623] [2024-11-09 05:16:45,059 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 05:16:45,059 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:16:45,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:16:45,059 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:16:45,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:16:46,029 INFO L180 IcfgInterpreter]: Interpretation finished