./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/strreplace-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/strreplace-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2 --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 64bit --witnessprinter.graph.data.programhash d4de5096855b305f822a5b563f81ee8d3b63add498dc60d311755a4f31b28f6b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:29:00,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:29:00,226 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-02 12:29:00,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:29:00,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:29:00,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:29:00,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:29:00,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:29:00,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:29:00,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:29:00,297 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:29:00,298 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:29:00,298 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:29:00,299 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:29:00,299 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:29:00,300 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:29:00,302 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:29:00,303 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:29:00,306 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:29:00,307 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:29:00,307 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:29:00,308 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:29:00,309 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:29:00,309 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:29:00,309 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:29:00,310 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:29:00,310 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:29:00,310 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:29:00,311 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:29:00,311 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:29:00,311 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:29:00,314 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:29:00,316 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:29:00,316 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:29:00,317 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:29:00,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:29:00,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:29:00,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:29:00,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:29:00,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:29:00,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:29:00,320 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:29:00,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:29:00,320 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:29:00,321 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:29:00,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:29:00,322 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_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4de5096855b305f822a5b563f81ee8d3b63add498dc60d311755a4f31b28f6b [2024-11-02 12:29:00,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:29:00,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:29:00,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:29:00,755 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:29:00,758 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:29:00,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/termination-memory-alloca/strreplace-alloca-1.i Unable to find full path for "g++" [2024-11-02 12:29:02,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:29:03,331 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:29:03,332 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/sv-benchmarks/c/termination-memory-alloca/strreplace-alloca-1.i [2024-11-02 12:29:03,356 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/data/b9611c5c7/95f378f0882047e3a80b2869057a6f7a/FLAG6839440bb [2024-11-02 12:29:03,374 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/data/b9611c5c7/95f378f0882047e3a80b2869057a6f7a [2024-11-02 12:29:03,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:29:03,379 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:29:03,380 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:29:03,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:29:03,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:29:03,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6efcd9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03, skipping insertion in model container [2024-11-02 12:29:03,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,434 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:29:03,768 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-02 12:29:03,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:29:03,786 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:29:03,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:29:03,888 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:29:03,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03 WrapperNode [2024-11-02 12:29:03,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:29:03,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:29:03,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:29:03,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:29:03,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,912 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,933 INFO L138 Inliner]: procedures = 111, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2024-11-02 12:29:03,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:29:03,934 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:29:03,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:29:03,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:29:03,944 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,947 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,951 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,954 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,957 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:29:03,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:29:03,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:29:03,960 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:29:03,961 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (1/1) ... [2024-11-02 12:29:03,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:29:03,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:03,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:29:03,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:29:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:29:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:29:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:29:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:29:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:29:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:29:04,127 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:29:04,129 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:29:04,286 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-02 12:29:04,286 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:29:04,336 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:29:04,337 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:29:04,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:29:04 BoogieIcfgContainer [2024-11-02 12:29:04,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:29:04,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:29:04,340 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:29:04,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:29:04,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:29:03" (1/3) ... [2024-11-02 12:29:04,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b21ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:29:04, skipping insertion in model container [2024-11-02 12:29:04,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:03" (2/3) ... [2024-11-02 12:29:04,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b21ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:29:04, skipping insertion in model container [2024-11-02 12:29:04,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:29:04" (3/3) ... [2024-11-02 12:29:04,348 INFO L112 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-1.i [2024-11-02 12:29:04,370 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:29:04,372 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-11-02 12:29:04,416 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:29:04,422 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;@480251e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:29:04,422 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-02 12:29:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 2.2) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:04,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-02 12:29:04,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:04,431 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-02 12:29:04,432 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:04,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:04,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2739, now seen corresponding path program 1 times [2024-11-02 12:29:04,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:04,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950351505] [2024-11-02 12:29:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:04,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:04,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:04,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950351505] [2024-11-02 12:29:04,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950351505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:04,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:04,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:29:04,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653304630] [2024-11-02 12:29:04,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:04,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:29:04,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:04,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:29:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:04,822 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 2.2) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) 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) [2024-11-02 12:29:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:04,899 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2024-11-02 12:29:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:29:04,901 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 [2024-11-02 12:29:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:04,909 INFO L225 Difference]: With dead ends: 19 [2024-11-02 12:29:04,910 INFO L226 Difference]: Without dead ends: 18 [2024-11-02 12:29:04,912 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 [2024-11-02 12:29:04,918 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:04,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:29:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-02 12:29:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-02 12:29:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.9) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-02 12:29:04,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 2 [2024-11-02 12:29:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:04,952 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-02 12:29:04,952 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) [2024-11-02 12:29:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-02 12:29:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-02 12:29:04,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:04,953 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-02 12:29:04,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:29:04,955 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:04,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2740, now seen corresponding path program 1 times [2024-11-02 12:29:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:04,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741722495] [2024-11-02 12:29:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:04,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:05,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:05,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741722495] [2024-11-02 12:29:05,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741722495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:05,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:05,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:29:05,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033950054] [2024-11-02 12:29:05,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:05,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:29:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:05,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:29:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:05,310 INFO L87 Difference]: Start difference. First operand 18 states and 19 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) [2024-11-02 12:29:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:05,355 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2024-11-02 12:29:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:29:05,357 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 [2024-11-02 12:29:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:05,357 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:29:05,357 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:29:05,358 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 [2024-11-02 12:29:05,359 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:05,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:29:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:29:05,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-02 12:29:05,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-02 12:29:05,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 2 [2024-11-02 12:29:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:05,367 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-02 12:29:05,368 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) [2024-11-02 12:29:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-02 12:29:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:29:05,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:05,369 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:29:05,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:29:05,369 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:05,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:05,372 INFO L85 PathProgramCache]: Analyzing trace with hash 86137, now seen corresponding path program 1 times [2024-11-02 12:29:05,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:05,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125384554] [2024-11-02 12:29:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:05,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:05,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125384554] [2024-11-02 12:29:05,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125384554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:05,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:05,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:29:05,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723810423] [2024-11-02 12:29:05,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:05,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:29:05,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:29:05,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:05,446 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:05,483 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2024-11-02 12:29:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:29:05,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 12:29:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:05,485 INFO L225 Difference]: With dead ends: 14 [2024-11-02 12:29:05,485 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 12:29:05,486 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 [2024-11-02 12:29:05,487 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:05,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:29:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 12:29:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-02 12:29:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.5) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-02 12:29:05,495 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 3 [2024-11-02 12:29:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:05,495 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-02 12:29:05,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-02 12:29:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:29:05,497 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:05,497 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:29:05,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:29:05,498 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:05,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:05,499 INFO L85 PathProgramCache]: Analyzing trace with hash 86138, now seen corresponding path program 1 times [2024-11-02 12:29:05,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:05,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144694984] [2024-11-02 12:29:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:05,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:05,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:05,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144694984] [2024-11-02 12:29:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144694984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:05,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:05,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:29:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958605649] [2024-11-02 12:29:05,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:05,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:29:05,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:05,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:29:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:05,755 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:05,803 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-02 12:29:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:29:05,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 12:29:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:05,805 INFO L225 Difference]: With dead ends: 21 [2024-11-02 12:29:05,805 INFO L226 Difference]: Without dead ends: 21 [2024-11-02 12:29:05,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:05,806 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:05,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:29:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-02 12:29:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2024-11-02 12:29:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-02 12:29:05,811 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 3 [2024-11-02 12:29:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:05,812 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-02 12:29:05,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-02 12:29:05,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:29:05,812 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:05,813 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:29:05,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:29:05,813 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:05,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1728865989, now seen corresponding path program 1 times [2024-11-02 12:29:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576350307] [2024-11-02 12:29:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:05,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:05,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576350307] [2024-11-02 12:29:05,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576350307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:05,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:05,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:29:05,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172992923] [2024-11-02 12:29:05,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:05,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:29:05,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:05,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:29:05,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:05,963 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:05,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:05,990 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2024-11-02 12:29:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:29:05,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 12:29:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:05,993 INFO L225 Difference]: With dead ends: 18 [2024-11-02 12:29:05,993 INFO L226 Difference]: Without dead ends: 16 [2024-11-02 12:29:05,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:05,999 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:05,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:29:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-02 12:29:06,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-02 12:29:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-02 12:29:06,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 6 [2024-11-02 12:29:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:06,020 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-02 12:29:06,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-02 12:29:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:29:06,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:06,021 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:29:06,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:29:06,021 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:06,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash 713222009, now seen corresponding path program 1 times [2024-11-02 12:29:06,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:06,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734826812] [2024-11-02 12:29:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:06,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:06,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:06,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734826812] [2024-11-02 12:29:06,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734826812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:06,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632884547] [2024-11-02 12:29:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:06,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:06,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:06,386 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:06,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:29:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:06,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-02 12:29:06,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:06,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-02 12:29:06,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:29:06,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-02 12:29:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:06,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:07,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-02 12:29:07,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-02 12:29:07,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-02 12:29:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:07,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632884547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:29:07,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203108584] [2024-11-02 12:29:07,170 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:29:07,231 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:29:07,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:29:07,250 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:29:07,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:29:08,992 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:29:10,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '270#(exists ((|v_ULTIMATE.start_cstrreplace_~p~0#1.base_28| Int) (|v_ULTIMATE.start_cstrreplace_~p~0#1.offset_25| Int)) (and (= |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_25| (select |#length| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_28|)) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_28|) (+ (- 1) |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_25|)) |ULTIMATE.start_cstrreplace_~old#1|)) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= (select |#valid| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_28|) 1) (<= 2 |v_ULTIMATE.start_cstrreplace_~p~0#1.base_28|) (<= 1 |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_25|)))' at error location [2024-11-02 12:29:10,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:29:10,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:29:10,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-02 12:29:10,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468177104] [2024-11-02 12:29:10,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:29:10,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 12:29:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 12:29:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=392, Unknown=1, NotChecked=0, Total=462 [2024-11-02 12:29:10,714 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:10,954 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-02 12:29:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:29:10,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 12:29:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:10,955 INFO L225 Difference]: With dead ends: 22 [2024-11-02 12:29:10,955 INFO L226 Difference]: Without dead ends: 22 [2024-11-02 12:29:10,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=98, Invalid=501, Unknown=1, NotChecked=0, Total=600 [2024-11-02 12:29:10,956 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:10,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 24 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:29:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-02 12:29:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2024-11-02 12:29:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-02 12:29:10,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2024-11-02 12:29:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:10,960 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-02 12:29:10,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-02 12:29:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:29:10,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:10,961 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2024-11-02 12:29:10,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:29:11,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:11,165 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:11,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash 313710554, now seen corresponding path program 2 times [2024-11-02 12:29:11,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:11,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872518853] [2024-11-02 12:29:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:11,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872518853] [2024-11-02 12:29:11,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872518853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:11,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303855307] [2024-11-02 12:29:11,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:29:11,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:11,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:11,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:29:11,772 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:29:11,772 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:29:11,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-02 12:29:11,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:11,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-02 12:29:12,151 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-02 12:29:12,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 20 [2024-11-02 12:29:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:12,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:12,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-02 12:29:12,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-02 12:29:12,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2024-11-02 12:29:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:12,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303855307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:29:12,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935874394] [2024-11-02 12:29:12,573 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:29:12,573 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:29:12,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:29:12,574 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:29:12,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:29:13,543 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:29:15,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '418#(exists ((|v_ULTIMATE.start_cstrreplace_~p~0#1.base_38| Int) (|v_ULTIMATE.start_cstrreplace_~p~0#1.offset_35| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_35|) (<= 2 |v_ULTIMATE.start_cstrreplace_~p~0#1.base_38|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_38|) (+ (- 1) |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_35|)) |ULTIMATE.start_cstrreplace_~old#1|)) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= (select |#valid| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_38|) 1) (= |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_35| (select |#length| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_38|))))' at error location [2024-11-02 12:29:15,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:29:15,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:29:15,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 23 [2024-11-02 12:29:15,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832442459] [2024-11-02 12:29:15,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:29:15,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-02 12:29:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-02 12:29:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=854, Unknown=1, NotChecked=0, Total=992 [2024-11-02 12:29:15,122 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 25 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:15,976 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-11-02 12:29:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-02 12:29:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-02 12:29:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:15,978 INFO L225 Difference]: With dead ends: 53 [2024-11-02 12:29:15,978 INFO L226 Difference]: Without dead ends: 53 [2024-11-02 12:29:15,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=334, Invalid=1827, Unknown=1, NotChecked=0, Total=2162 [2024-11-02 12:29:15,980 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:15,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 83 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:29:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-02 12:29:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2024-11-02 12:29:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-02 12:29:15,985 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 13 [2024-11-02 12:29:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:15,985 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-02 12:29:15,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-02 12:29:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 12:29:15,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:15,987 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2024-11-02 12:29:16,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:29:16,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:16,191 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:16,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1426988989, now seen corresponding path program 1 times [2024-11-02 12:29:16,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:16,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751382308] [2024-11-02 12:29:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:16,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751382308] [2024-11-02 12:29:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751382308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515122689] [2024-11-02 12:29:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:16,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:16,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:16,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:16,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:29:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:16,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-02 12:29:16,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:16,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-02 12:29:17,212 INFO L349 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2024-11-02 12:29:17,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 26 [2024-11-02 12:29:17,775 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2024-11-02 12:29:17,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2024-11-02 12:29:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:17,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:18,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-02 12:29:18,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-11-02 12:29:18,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-02 12:29:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515122689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:29:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890843156] [2024-11-02 12:29:18,527 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:29:18,527 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:29:18,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:29:18,528 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:29:18,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:29:19,253 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:29:19,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '679#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstrreplace_~numReplaced~0#1|))' at error location [2024-11-02 12:29:19,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:29:19,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:29:19,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 29 [2024-11-02 12:29:19,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859942953] [2024-11-02 12:29:19,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:29:19,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-02 12:29:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:19,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-02 12:29:19,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2024-11-02 12:29:19,702 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:21,207 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2024-11-02 12:29:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-02 12:29:21,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-02 12:29:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:21,209 INFO L225 Difference]: With dead ends: 88 [2024-11-02 12:29:21,209 INFO L226 Difference]: Without dead ends: 88 [2024-11-02 12:29:21,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=488, Invalid=3052, Unknown=0, NotChecked=0, Total=3540 [2024-11-02 12:29:21,212 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:21,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 119 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:29:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-02 12:29:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 40. [2024-11-02 12:29:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-11-02 12:29:21,218 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 19 [2024-11-02 12:29:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:21,218 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-11-02 12:29:21,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-11-02 12:29:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-02 12:29:21,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:21,220 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2024-11-02 12:29:21,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:29:21,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:21,421 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-02 12:29:21,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash -550584678, now seen corresponding path program 3 times [2024-11-02 12:29:21,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:21,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840686104] [2024-11-02 12:29:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:21,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:22,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:22,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840686104] [2024-11-02 12:29:22,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840686104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:22,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956624507] [2024-11-02 12:29:22,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:29:22,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:22,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:22,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:22,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e0e3e0-bc85-45a9-84d1-92bd0eac897c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:29:22,215 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:29:22,216 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:29:22,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-02 12:29:22,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:22,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-02 12:29:24,180 INFO L349 Elim1Store]: treesize reduction 20, result has 70.1 percent of original size [2024-11-02 12:29:24,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 73 [2024-11-02 12:29:24,200 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-02 12:29:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:24,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:26,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2024-11-02 12:29:26,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 115 [2024-11-02 12:29:26,550 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-02 12:29:26,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-02 12:29:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:26,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956624507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:29:26,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901692826] [2024-11-02 12:29:26,587 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:29:26,587 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:29:26,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:29:26,588 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:29:26,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:29:27,474 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:29:29,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1102#(exists ((|v_ULTIMATE.start_cstrreplace_~p~0#1.offset_65| Int) (|v_ULTIMATE.start_cstrreplace_~p~0#1.base_68| Int)) (and (<= 1 |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_65|) (<= 2 |v_ULTIMATE.start_cstrreplace_~p~0#1.base_68|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_68|) (+ (- 1) |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_65|)) |ULTIMATE.start_cstrreplace_~old#1|)) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= 1 (select |#valid| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_68|)) (= |v_ULTIMATE.start_cstrreplace_~p~0#1.offset_65| (select |#length| |v_ULTIMATE.start_cstrreplace_~p~0#1.base_68|))))' at error location [2024-11-02 12:29:29,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:29:29,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:29:29,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 20] total 49 [2024-11-02 12:29:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328665435] [2024-11-02 12:29:29,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:29:29,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-02 12:29:29,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-02 12:29:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=2942, Unknown=1, NotChecked=0, Total=3306 [2024-11-02 12:29:29,705 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 51 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)