./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/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_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/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_9e22dec0-f73e-4510-b3eb-6e86470af00f/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 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:04:32,275 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:04:32,367 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 06:04:32,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:04:32,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:04:32,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:04:32,403 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:04:32,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:04:32,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:04:32,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:04:32,406 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:04:32,406 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:04:32,407 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:04:32,407 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:04:32,408 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:04:32,408 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:04:32,409 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:04:32,409 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:04:32,410 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:04:32,410 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:04:32,411 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:04:32,411 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:04:32,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 06:04:32,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 06:04:32,414 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:04:32,414 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:04:32,415 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:04:32,415 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:04:32,415 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:04:32,416 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 06:04:32,416 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 06:04:32,417 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 06:04:32,417 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:04:32,418 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 06:04:32,418 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:04:32,419 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 06:04:32,419 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:04:32,419 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:04:32,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:04:32,420 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:04:32,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:04:32,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:04:32,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:04:32,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:04:32,423 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:04:32,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:04:32,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:04:32,423 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:04:32,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:04:32,424 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_9e22dec0-f73e-4510-b3eb-6e86470af00f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a [2024-11-09 06:04:32,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:04:32,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:04:32,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:04:32,826 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:04:32,827 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:04:32,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i Unable to find full path for "g++" [2024-11-09 06:04:35,324 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:04:35,585 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:04:35,586 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2024-11-09 06:04:35,602 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/data/a14e7b259/98f197d1f6d641c0b9d02f07f511a2c8/FLAGa8e2eb956 [2024-11-09 06:04:35,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/data/a14e7b259/98f197d1f6d641c0b9d02f07f511a2c8 [2024-11-09 06:04:35,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:04:35,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:04:35,627 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:04:35,627 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:04:35,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:04:35,636 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:04:35" (1/1) ... [2024-11-09 06:04:35,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb1aae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:35, skipping insertion in model container [2024-11-09 06:04:35,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:04:35" (1/1) ... [2024-11-09 06:04:35,686 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:04:36,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:04:36,110 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:04:36,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:04:36,184 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:04:36,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36 WrapperNode [2024-11-09 06:04:36,185 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:04:36,186 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:04:36,186 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:04:36,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:04:36,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,235 INFO L138 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 97 [2024-11-09 06:04:36,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:04:36,236 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:04:36,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:04:36,237 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:04:36,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,272 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,274 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,276 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,279 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:04:36,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:04:36,280 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:04:36,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:04:36,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (1/1) ... [2024-11-09 06:04:36,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:04:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:36,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:04:36,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:04:36,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:04:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 06:04:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:04:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 06:04:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 06:04:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:04:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:04:36,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:04:36,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:04:36,372 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-11-09 06:04:36,372 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-11-09 06:04:36,469 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:04:36,471 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:04:36,981 INFO L? ?]: Removed 131 outVars from TransFormulas that were not future-live. [2024-11-09 06:04:36,981 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:04:37,057 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:04:37,057 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:04:37,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:04:37 BoogieIcfgContainer [2024-11-09 06:04:37,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:04:37,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:04:37,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:04:37,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:04:37,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:04:35" (1/3) ... [2024-11-09 06:04:37,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7aa7fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:04:37, skipping insertion in model container [2024-11-09 06:04:37,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:36" (2/3) ... [2024-11-09 06:04:37,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7aa7fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:04:37, skipping insertion in model container [2024-11-09 06:04:37,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:04:37" (3/3) ... [2024-11-09 06:04:37,069 INFO L112 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2024-11-09 06:04:37,085 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:04:37,086 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2024-11-09 06:04:37,150 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:04:37,160 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;@52d1af5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:04:37,160 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-09 06:04:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 53 states have (on average 2.30188679245283) internal successors, (122), 112 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:04:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-09 06:04:37,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:37,178 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-09 06:04:37,179 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:37,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash 6855, now seen corresponding path program 1 times [2024-11-09 06:04:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:37,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896098947] [2024-11-09 06:04:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:37,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:37,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896098947] [2024-11-09 06:04:37,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896098947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:37,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:37,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:04:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20022721] [2024-11-09 06:04:37,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:37,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:37,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:37,569 INFO L87 Difference]: Start difference. First operand has 116 states, 53 states have (on average 2.30188679245283) internal successors, (122), 112 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:37,818 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2024-11-09 06:04:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2024-11-09 06:04:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:37,833 INFO L225 Difference]: With dead ends: 151 [2024-11-09 06:04:37,834 INFO L226 Difference]: Without dead ends: 150 [2024-11-09 06:04:37,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:37,841 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 47 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:37,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 149 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:04:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-09 06:04:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2024-11-09 06:04:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 53 states have (on average 2.2264150943396226) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:04:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2024-11-09 06:04:37,906 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 2 [2024-11-09 06:04:37,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:37,906 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2024-11-09 06:04:37,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2024-11-09 06:04:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-09 06:04:37,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:37,907 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-09 06:04:37,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:04:37,910 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:37,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash 6856, now seen corresponding path program 1 times [2024-11-09 06:04:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16403564] [2024-11-09 06:04:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:37,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:38,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:38,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16403564] [2024-11-09 06:04:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16403564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:38,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:38,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:04:38,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456931244] [2024-11-09 06:04:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:38,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:38,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:38,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:38,075 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:38,201 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2024-11-09 06:04:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2024-11-09 06:04:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:38,203 INFO L225 Difference]: With dead ends: 113 [2024-11-09 06:04:38,203 INFO L226 Difference]: Without dead ends: 113 [2024-11-09 06:04:38,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:38,205 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:38,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 166 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:04:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-09 06:04:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-11-09 06:04:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 53 states have (on average 2.188679245283019) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:04:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2024-11-09 06:04:38,219 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 2 [2024-11-09 06:04:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:38,220 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2024-11-09 06:04:38,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2024-11-09 06:04:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:04:38,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:38,221 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:04:38,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:04:38,222 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:38,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash 6592533, now seen corresponding path program 1 times [2024-11-09 06:04:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:38,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649491117] [2024-11-09 06:04:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:38,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:38,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:38,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649491117] [2024-11-09 06:04:38,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649491117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:38,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:38,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:04:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973211712] [2024-11-09 06:04:38,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:38,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:38,345 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:38,486 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2024-11-09 06:04:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 06:04:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:38,489 INFO L225 Difference]: With dead ends: 127 [2024-11-09 06:04:38,489 INFO L226 Difference]: Without dead ends: 127 [2024-11-09 06:04:38,489 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 06:04:38,491 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:38,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 152 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:04:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-09 06:04:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2024-11-09 06:04:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 111 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:04:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2024-11-09 06:04:38,502 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 4 [2024-11-09 06:04:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:38,502 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2024-11-09 06:04:38,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2024-11-09 06:04:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:04:38,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:38,503 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:04:38,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:04:38,504 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:38,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash 6592534, now seen corresponding path program 1 times [2024-11-09 06:04:38,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:38,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813274436] [2024-11-09 06:04:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:38,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:38,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:38,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813274436] [2024-11-09 06:04:38,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813274436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:38,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:38,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:04:38,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315806457] [2024-11-09 06:04:38,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:38,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:38,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:38,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:38,609 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:38,719 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2024-11-09 06:04:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:38,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 06:04:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:38,721 INFO L225 Difference]: With dead ends: 115 [2024-11-09 06:04:38,723 INFO L226 Difference]: Without dead ends: 115 [2024-11-09 06:04:38,723 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 06:04:38,724 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 3 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:38,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 165 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:04:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-09 06:04:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-11-09 06:04:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 109 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:04:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2024-11-09 06:04:38,742 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 4 [2024-11-09 06:04:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:38,743 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2024-11-09 06:04:38,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2024-11-09 06:04:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:04:38,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:38,744 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:38,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:04:38,745 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:38,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:38,745 INFO L85 PathProgramCache]: Analyzing trace with hash 728408235, now seen corresponding path program 1 times [2024-11-09 06:04:38,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:38,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53073922] [2024-11-09 06:04:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:38,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:38,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:38,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53073922] [2024-11-09 06:04:38,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53073922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:38,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:38,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:04:38,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697270617] [2024-11-09 06:04:38,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:38,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:38,884 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:39,007 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2024-11-09 06:04:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 06:04:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:39,010 INFO L225 Difference]: With dead ends: 108 [2024-11-09 06:04:39,010 INFO L226 Difference]: Without dead ends: 108 [2024-11-09 06:04:39,010 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 06:04:39,012 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 31 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:39,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 122 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:04:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-09 06:04:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-09 06:04:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 104 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:04:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2024-11-09 06:04:39,025 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 9 [2024-11-09 06:04:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:39,026 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2024-11-09 06:04:39,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2024-11-09 06:04:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:04:39,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:39,027 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:39,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:04:39,028 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:39,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 728408236, now seen corresponding path program 1 times [2024-11-09 06:04:39,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:39,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539241200] [2024-11-09 06:04:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:39,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:39,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539241200] [2024-11-09 06:04:39,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539241200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:39,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:39,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:04:39,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983522716] [2024-11-09 06:04:39,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:39,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:39,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:39,224 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:39,336 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2024-11-09 06:04:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:39,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 06:04:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:39,338 INFO L225 Difference]: With dead ends: 103 [2024-11-09 06:04:39,338 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 06:04:39,338 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 06:04:39,340 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:39,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 131 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:04:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 06:04:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-11-09 06:04:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 99 states have internal predecessors, (112), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:04:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2024-11-09 06:04:39,347 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 9 [2024-11-09 06:04:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:39,348 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2024-11-09 06:04:39,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2024-11-09 06:04:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 06:04:39,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:39,349 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:39,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 06:04:39,350 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:39,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:39,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1105818902, now seen corresponding path program 1 times [2024-11-09 06:04:39,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:39,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125287645] [2024-11-09 06:04:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:39,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:39,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125287645] [2024-11-09 06:04:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125287645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:39,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:04:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167689936] [2024-11-09 06:04:39,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:39,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:04:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:04:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:04:39,720 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:40,070 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2024-11-09 06:04:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:04:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 06:04:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:40,073 INFO L225 Difference]: With dead ends: 200 [2024-11-09 06:04:40,073 INFO L226 Difference]: Without dead ends: 200 [2024-11-09 06:04:40,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:04:40,074 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 215 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:40,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 192 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:04:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-09 06:04:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 132. [2024-11-09 06:04:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 93 states have (on average 1.8064516129032258) internal successors, (168), 127 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:04:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2024-11-09 06:04:40,096 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 10 [2024-11-09 06:04:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:40,096 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2024-11-09 06:04:40,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2024-11-09 06:04:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 06:04:40,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:40,102 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:40,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:04:40,102 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:40,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1105818903, now seen corresponding path program 1 times [2024-11-09 06:04:40,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:40,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979947584] [2024-11-09 06:04:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:40,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:40,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:40,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979947584] [2024-11-09 06:04:40,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979947584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:40,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:40,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:04:40,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007902168] [2024-11-09 06:04:40,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:40,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:04:40,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:40,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:04:40,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:04:40,567 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:40,798 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2024-11-09 06:04:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:04:40,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 06:04:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:40,801 INFO L225 Difference]: With dead ends: 150 [2024-11-09 06:04:40,801 INFO L226 Difference]: Without dead ends: 150 [2024-11-09 06:04:40,802 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:04:40,803 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 19 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:40,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 246 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:04:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-09 06:04:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2024-11-09 06:04:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.7314814814814814) internal successors, (187), 142 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 06:04:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 193 transitions. [2024-11-09 06:04:40,822 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 193 transitions. Word has length 10 [2024-11-09 06:04:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:40,823 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 193 transitions. [2024-11-09 06:04:40,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 193 transitions. [2024-11-09 06:04:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 06:04:40,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:40,828 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:40,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 06:04:40,828 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:40,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2033419741, now seen corresponding path program 1 times [2024-11-09 06:04:40,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:40,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944105278] [2024-11-09 06:04:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:40,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:41,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:41,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944105278] [2024-11-09 06:04:41,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944105278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:41,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:41,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:04:41,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295226438] [2024-11-09 06:04:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:41,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:04:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:04:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:04:41,609 INFO L87 Difference]: Start difference. First operand 148 states and 193 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:41,977 INFO L93 Difference]: Finished difference Result 184 states and 230 transitions. [2024-11-09 06:04:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:04:41,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 06:04:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:41,980 INFO L225 Difference]: With dead ends: 184 [2024-11-09 06:04:41,980 INFO L226 Difference]: Without dead ends: 184 [2024-11-09 06:04:41,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:04:41,983 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 57 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:41,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 345 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:04:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-09 06:04:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 148. [2024-11-09 06:04:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.7222222222222223) internal successors, (186), 142 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 06:04:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 192 transitions. [2024-11-09 06:04:41,997 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 192 transitions. Word has length 17 [2024-11-09 06:04:41,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:41,997 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 192 transitions. [2024-11-09 06:04:41,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 192 transitions. [2024-11-09 06:04:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 06:04:41,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:41,999 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:41,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 06:04:42,000 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:42,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 344822845, now seen corresponding path program 1 times [2024-11-09 06:04:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:42,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401253544] [2024-11-09 06:04:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:42,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:42,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401253544] [2024-11-09 06:04:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401253544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:42,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:42,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:04:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457639275] [2024-11-09 06:04:42,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:42,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:04:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:42,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:04:42,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:04:42,743 INFO L87 Difference]: Start difference. First operand 148 states and 192 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:43,021 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2024-11-09 06:04:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:04:43,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-09 06:04:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:43,022 INFO L225 Difference]: With dead ends: 142 [2024-11-09 06:04:43,022 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 06:04:43,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:04:43,023 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 5 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:43,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 384 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:04:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 06:04:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2024-11-09 06:04:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 102 states have (on average 1.7352941176470589) internal successors, (177), 136 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 06:04:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 183 transitions. [2024-11-09 06:04:43,031 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 183 transitions. Word has length 18 [2024-11-09 06:04:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:43,031 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 183 transitions. [2024-11-09 06:04:43,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:04:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 183 transitions. [2024-11-09 06:04:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 06:04:43,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:43,034 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:43,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 06:04:43,034 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:43,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash 762021661, now seen corresponding path program 1 times [2024-11-09 06:04:43,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:43,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876637179] [2024-11-09 06:04:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:43,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:43,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:43,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876637179] [2024-11-09 06:04:43,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876637179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:43,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:43,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:04:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343930057] [2024-11-09 06:04:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:43,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:43,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:43,109 INFO L87 Difference]: Start difference. First operand 142 states and 183 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:04:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:43,158 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2024-11-09 06:04:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-11-09 06:04:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:43,160 INFO L225 Difference]: With dead ends: 134 [2024-11-09 06:04:43,160 INFO L226 Difference]: Without dead ends: 134 [2024-11-09 06:04:43,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:43,161 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:43,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:04:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-09 06:04:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2024-11-09 06:04:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.6506024096385543) internal successors, (137), 117 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 06:04:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2024-11-09 06:04:43,165 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 24 [2024-11-09 06:04:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:43,165 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2024-11-09 06:04:43,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:04:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2024-11-09 06:04:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 06:04:43,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:43,166 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] [2024-11-09 06:04:43,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:04:43,166 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:04:43,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2085423782, now seen corresponding path program 1 times [2024-11-09 06:04:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:43,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525969107] [2024-11-09 06:04:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:43,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:43,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:43,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525969107] [2024-11-09 06:04:43,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525969107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:43,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119482168] [2024-11-09 06:04:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:43,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:43,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:04:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:43,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 06:04:43,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:43,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 06:04:43,896 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 6 treesize of output 5 [2024-11-09 06:04:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:04:43,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-09 06:04:43,977 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 06:04:43,977 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 11 treesize of output 11 [2024-11-09 06:04:44,049 WARN L873 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (= (store |c_old(#length)| append_~node~0.base 9) |c_#length|)) is different from true [2024-11-09 06:04:44,115 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-09 06:04:44,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2024-11-09 06:04:44,298 INFO L349 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2024-11-09 06:04:44,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 34 [2024-11-09 06:04:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-09 06:04:44,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:44,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119482168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116638461] [2024-11-09 06:04:44,672 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 06:04:44,672 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:04:44,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:04:44,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:04:44,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:04:47,714 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 28 for LOIs [2024-11-09 06:04:47,905 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:10,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3186#(and (= 0 (select |old(#valid)| append_~node~0.base)) (<= 1 |#StackHeapBarrier|) (= (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) 0 (select (select |#memory_$Pointer$.base| append_~node~0.base) 0))) |#memory_$Pointer$.base|) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) 0 |append_#in~input|))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (<= (select |#length| |append_#in~head.base|) 3) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) 0 (select (select |#memory_$Pointer$.offset| append_~node~0.base) 0)))) (<= (+ append_~node~0.base 1) |#StackHeapBarrier|) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (<= |append_#in~input| 127))' at error location [2024-11-09 06:05:10,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:10,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:05:10,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2024-11-09 06:05:10,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267370580] [2024-11-09 06:05:10,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:10,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:05:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:05:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1279, Unknown=8, NotChecked=74, Total=1560 [2024-11-09 06:05:10,783 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:05:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:13,427 INFO L93 Difference]: Finished difference Result 217 states and 243 transitions. [2024-11-09 06:05:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:05:13,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-11-09 06:05:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:13,430 INFO L225 Difference]: With dead ends: 217 [2024-11-09 06:05:13,432 INFO L226 Difference]: Without dead ends: 217 [2024-11-09 06:05:13,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=331, Invalid=2099, Unknown=24, NotChecked=96, Total=2550 [2024-11-09 06:05:13,434 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 325 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:13,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 806 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 808 Invalid, 0 Unknown, 209 Unchecked, 1.8s Time] [2024-11-09 06:05:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-09 06:05:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 139. [2024-11-09 06:05:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 97 states have (on average 1.5463917525773196) internal successors, (150), 132 states have internal predecessors, (150), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 06:05:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2024-11-09 06:05:13,446 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 26 [2024-11-09 06:05:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:13,448 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2024-11-09 06:05:13,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:05:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2024-11-09 06:05:13,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 06:05:13,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:13,450 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:13,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:05:13,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:05:13,656 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 06:05:13,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash -529529079, now seen corresponding path program 1 times [2024-11-09 06:05:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:13,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346372975] [2024-11-09 06:05:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:13,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:14,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:14,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346372975] [2024-11-09 06:05:14,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346372975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:14,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146733961] [2024-11-09 06:05:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:14,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:14,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:14,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e22dec0-f73e-4510-b3eb-6e86470af00f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:05:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:14,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 06:05:14,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:14,339 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 6 treesize of output 5 [2024-11-09 06:05:14,381 WARN L873 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (and (= (select |c_old(#valid)| append_~node~0.base) 0) (= |c_#valid| (store |c_old(#valid)| append_~node~0.base (select |c_#valid| append_~node~0.base))))) is different from true [2024-11-09 06:05:14,571 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 06:05:14,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 06:05:14,629 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 06:05:14,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 06:05:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-09 06:05:14,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:14,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146733961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:14,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892814772] [2024-11-09 06:05:14,857 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 06:05:14,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:14,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:14,860 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:14,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:16,802 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 279 for LOIs [2024-11-09 06:05:25,058 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:01,073 WARN L286 SmtUtils]: Spent 32.23s on a formula simplification. DAG size of input: 324 DAG size of output: 245 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:06:33,914 WARN L286 SmtUtils]: Spent 18.76s on a formula simplification. DAG size of input: 279 DAG size of output: 273 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:07:11,719 WARN L286 SmtUtils]: Spent 31.70s on a formula simplification. DAG size of input: 302 DAG size of output: 296 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:08:01,410 WARN L286 SmtUtils]: Spent 42.99s on a formula simplification. DAG size of input: 323 DAG size of output: 313 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:09:11,374 WARN L286 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 341 DAG size of output: 331 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:10:24,859 WARN L286 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 333 DAG size of output: 322 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:11:54,682 WARN L286 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 345 DAG size of output: 334 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:13:19,601 WARN L286 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 337 DAG size of output: 326 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:16:40,407 WARN L286 SmtUtils]: Spent 2.96m on a formula simplification. DAG size of input: 350 DAG size of output: 339 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)