./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrspn_diffterm_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/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_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrspn_diffterm_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/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_a49ce7c8-1829-4719-a619-4fc247e3a481/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 0942d3c46657b9d8ac8f8537aec24fbcc2f0b19e897472dc297ad201df07c1bb --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:24:02,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:24:02,284 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-02 11:24:02,291 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:24:02,294 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:24:02,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:24:02,332 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:24:02,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:24:02,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:24:02,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:24:02,334 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:24:02,334 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:24:02,335 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:24:02,337 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:24:02,338 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:24:02,338 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:24:02,338 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:24:02,338 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:24:02,339 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:24:02,339 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:24:02,339 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:24:02,343 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:24:02,344 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 11:24:02,344 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 11:24:02,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:24:02,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:24:02,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:24:02,346 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 11:24:02,347 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 11:24:02,347 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 11:24:02,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:24:02,347 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 11:24:02,348 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:24:02,348 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 11:24:02,348 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:24:02,348 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:24:02,349 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:24:02,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:24:02,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:24:02,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:24:02,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:24:02,351 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:24:02,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:24:02,352 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:24:02,352 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:24:02,352 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:24:02,353 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_a49ce7c8-1829-4719-a619-4fc247e3a481/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0942d3c46657b9d8ac8f8537aec24fbcc2f0b19e897472dc297ad201df07c1bb [2024-11-02 11:24:02,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:24:02,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:24:02,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:24:02,670 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:24:02,672 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:24:02,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/termination-15/cstrspn_diffterm_alloca.i Unable to find full path for "g++" [2024-11-02 11:24:04,609 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:24:04,911 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:24:04,912 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/sv-benchmarks/c/termination-15/cstrspn_diffterm_alloca.i [2024-11-02 11:24:04,924 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/data/62067ef5e/57823750938f4dcfa7e71578958c7474/FLAG04f1b8d3a [2024-11-02 11:24:04,938 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/data/62067ef5e/57823750938f4dcfa7e71578958c7474 [2024-11-02 11:24:04,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:24:04,943 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:24:04,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:24:04,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:24:04,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:24:04,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:24:04" (1/1) ... [2024-11-02 11:24:04,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33683c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:04, skipping insertion in model container [2024-11-02 11:24:04,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:24:04" (1/1) ... [2024-11-02 11:24:05,008 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:24:05,430 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 11:24:05,431 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 11:24:05,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:24:05,452 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:24:05,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:24:05,545 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:24:05,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05 WrapperNode [2024-11-02 11:24:05,546 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:24:05,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:24:05,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:24:05,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:24:05,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,569 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,592 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2024-11-02 11:24:05,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:24:05,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:24:05,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:24:05,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:24:05,603 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,611 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,615 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,616 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:24:05,619 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:24:05,620 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:24:05,620 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:24:05,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (1/1) ... [2024-11-02 11:24:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:24:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:05,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:24:05,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:24:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:24:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:24:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 11:24:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:24:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:24:05,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:24:05,807 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:24:05,809 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:24:06,105 INFO L? ?]: Removed 54 outVars from TransFormulas that were not future-live. [2024-11-02 11:24:06,105 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:24:06,241 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:24:06,241 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 11:24:06,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:24:06 BoogieIcfgContainer [2024-11-02 11:24:06,242 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:24:06,244 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:24:06,245 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:24:06,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:24:06,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:24:04" (1/3) ... [2024-11-02 11:24:06,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c03f86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:24:06, skipping insertion in model container [2024-11-02 11:24:06,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:05" (2/3) ... [2024-11-02 11:24:06,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c03f86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:24:06, skipping insertion in model container [2024-11-02 11:24:06,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:24:06" (3/3) ... [2024-11-02 11:24:06,255 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrspn_diffterm_alloca.i [2024-11-02 11:24:06,279 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:24:06,280 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-11-02 11:24:06,349 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:24:06,360 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;@718d7152, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:24:06,361 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-02 11:24:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-02 11:24:06,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:06,381 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-02 11:24:06,382 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:06,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash 3923, now seen corresponding path program 1 times [2024-11-02 11:24:06,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:06,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160386378] [2024-11-02 11:24:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:06,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:06,889 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 11:24:06,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:06,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160386378] [2024-11-02 11:24:06,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160386378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:06,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:06,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 11:24:06,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553752530] [2024-11-02 11:24:06,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:06,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:06,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:06,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:06,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:06,938 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 11:24:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:07,117 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-02 11:24:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:07,125 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 11:24:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:07,133 INFO L225 Difference]: With dead ends: 30 [2024-11-02 11:24:07,133 INFO L226 Difference]: Without dead ends: 29 [2024-11-02 11:24:07,135 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 11:24:07,141 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:07,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:24:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-02 11:24:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-02 11:24:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-11-02 11:24:07,178 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 2 [2024-11-02 11:24:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:07,179 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-11-02 11:24:07,180 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 11:24:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-11-02 11:24:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-02 11:24:07,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:07,182 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-02 11:24:07,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:24:07,183 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:07,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:07,183 INFO L85 PathProgramCache]: Analyzing trace with hash 3924, now seen corresponding path program 1 times [2024-11-02 11:24:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:07,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650378912] [2024-11-02 11:24:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:07,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:07,549 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 11:24:07,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:07,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650378912] [2024-11-02 11:24:07,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650378912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:07,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:07,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 11:24:07,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425047092] [2024-11-02 11:24:07,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:07,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:07,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:07,555 INFO L87 Difference]: Start difference. First operand 29 states and 32 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 11:24:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:07,616 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-02 11:24:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:07,618 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 11:24:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:07,619 INFO L225 Difference]: With dead ends: 28 [2024-11-02 11:24:07,619 INFO L226 Difference]: Without dead ends: 28 [2024-11-02 11:24:07,620 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 11:24:07,623 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:07,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:24:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-02 11:24:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-02 11:24:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 2.066666666666667) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-02 11:24:07,632 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 2 [2024-11-02 11:24:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:07,632 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-02 11:24:07,633 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 11:24:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-02 11:24:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 11:24:07,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:07,633 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 11:24:07,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:24:07,634 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:07,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash 121602, now seen corresponding path program 1 times [2024-11-02 11:24:07,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:07,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964927643] [2024-11-02 11:24:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:07,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:07,722 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 11:24:07,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:07,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964927643] [2024-11-02 11:24:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964927643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:07,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 11:24:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243419621] [2024-11-02 11:24:07,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:07,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:07,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:07,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:07,725 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:07,778 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-11-02 11:24:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:07,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 11:24:07,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:07,780 INFO L225 Difference]: With dead ends: 27 [2024-11-02 11:24:07,781 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 11:24:07,781 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 11:24:07,783 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:07,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:24:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 11:24:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-02 11:24:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 2.0) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-02 11:24:07,788 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 3 [2024-11-02 11:24:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:07,789 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-02 11:24:07,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-02 11:24:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 11:24:07,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:07,790 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 11:24:07,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:24:07,790 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:07,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash 121603, now seen corresponding path program 1 times [2024-11-02 11:24:07,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:07,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429752368] [2024-11-02 11:24:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:07,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:07,935 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 11:24:07,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:07,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429752368] [2024-11-02 11:24:07,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429752368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:07,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:07,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 11:24:07,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903022784] [2024-11-02 11:24:07,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:07,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:07,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:07,939 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:07,989 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-02 11:24:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 11:24:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:07,990 INFO L225 Difference]: With dead ends: 26 [2024-11-02 11:24:07,990 INFO L226 Difference]: Without dead ends: 26 [2024-11-02 11:24:07,992 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 11:24:07,993 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:07,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:24:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-02 11:24:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-02 11:24:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states 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 11:24:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-02 11:24:08,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2024-11-02 11:24:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:08,003 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-02 11:24:08,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-02 11:24:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 11:24:08,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:08,004 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 11:24:08,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:24:08,005 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:08,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 3771673, now seen corresponding path program 1 times [2024-11-02 11:24:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:08,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080892394] [2024-11-02 11:24:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:08,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:08,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080892394] [2024-11-02 11:24:08,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080892394] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:08,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:08,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:24:08,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628720371] [2024-11-02 11:24:08,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:08,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:24:08,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:08,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:24:08,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:24:08,072 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:08,140 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-02 11:24:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:24:08,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 11:24:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:08,141 INFO L225 Difference]: With dead ends: 24 [2024-11-02 11:24:08,142 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 11:24:08,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:24:08,144 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:08,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:24:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 11:24:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-02 11:24:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-02 11:24:08,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2024-11-02 11:24:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:08,151 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-02 11:24:08,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-02 11:24:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 11:24:08,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:08,154 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 11:24:08,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:24:08,155 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:08,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash 3771674, now seen corresponding path program 1 times [2024-11-02 11:24:08,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:08,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320614088] [2024-11-02 11:24:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:08,305 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 11:24:08,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:08,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320614088] [2024-11-02 11:24:08,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320614088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:08,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:08,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:24:08,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430295190] [2024-11-02 11:24:08,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:08,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:24:08,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:24:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:24:08,312 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:08,406 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-11-02 11:24:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:24:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 11:24:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:08,411 INFO L225 Difference]: With dead ends: 40 [2024-11-02 11:24:08,412 INFO L226 Difference]: Without dead ends: 40 [2024-11-02 11:24:08,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:24:08,413 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:08,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 47 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:24:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-02 11:24:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2024-11-02 11:24:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-02 11:24:08,422 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 4 [2024-11-02 11:24:08,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:08,422 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-02 11:24:08,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-02 11:24:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 11:24:08,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:08,423 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:08,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:24:08,424 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:08,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:08,425 INFO L85 PathProgramCache]: Analyzing trace with hash 692765309, now seen corresponding path program 1 times [2024-11-02 11:24:08,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:08,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679172564] [2024-11-02 11:24:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:08,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:08,514 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 11:24:08,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:08,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679172564] [2024-11-02 11:24:08,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679172564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:08,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:08,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:24:08,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723071475] [2024-11-02 11:24:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:08,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:24:08,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:08,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:24:08,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:24:08,517 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:08,576 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-11-02 11:24:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:24:08,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 11:24:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:08,577 INFO L225 Difference]: With dead ends: 24 [2024-11-02 11:24:08,577 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 11:24:08,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:24:08,578 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:08,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 14 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:24:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 11:24:08,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-02 11:24:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-02 11:24:08,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2024-11-02 11:24:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:08,587 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-02 11:24:08,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-02 11:24:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 11:24:08,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:08,588 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:08,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 11:24:08,589 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:08,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:08,589 INFO L85 PathProgramCache]: Analyzing trace with hash 692765310, now seen corresponding path program 1 times [2024-11-02 11:24:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538901834] [2024-11-02 11:24:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:08,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:08,768 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 11:24:08,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:08,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538901834] [2024-11-02 11:24:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538901834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:08,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:08,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:24:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887816381] [2024-11-02 11:24:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:08,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:24:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:24:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:24:08,771 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:08,860 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-11-02 11:24:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:24:08,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 11:24:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:08,862 INFO L225 Difference]: With dead ends: 29 [2024-11-02 11:24:08,862 INFO L226 Difference]: Without dead ends: 29 [2024-11-02 11:24:08,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:24:08,865 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:08,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:24:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-02 11:24:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-02 11:24:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-02 11:24:08,872 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2024-11-02 11:24:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:08,872 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-02 11:24:08,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-02 11:24:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 11:24:08,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:08,873 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:08,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 11:24:08,874 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:08,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash 820104, now seen corresponding path program 1 times [2024-11-02 11:24:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:08,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562998712] [2024-11-02 11:24:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:09,074 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 11:24:09,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:09,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562998712] [2024-11-02 11:24:09,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562998712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:09,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:09,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:24:09,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14672011] [2024-11-02 11:24:09,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:09,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:24:09,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:24:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:24:09,077 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:09,110 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-02 11:24:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:24:09,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 11:24:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:09,112 INFO L225 Difference]: With dead ends: 28 [2024-11-02 11:24:09,113 INFO L226 Difference]: Without dead ends: 25 [2024-11-02 11:24:09,113 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 11:24:09,117 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:09,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:24:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-02 11:24:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-02 11:24:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states 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 11:24:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-02 11:24:09,120 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2024-11-02 11:24:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:09,120 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-02 11:24:09,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-02 11:24:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 11:24:09,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:09,124 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:09,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 11:24:09,125 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:09,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash 854857532, now seen corresponding path program 1 times [2024-11-02 11:24:09,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895479739] [2024-11-02 11:24:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:09,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895479739] [2024-11-02 11:24:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895479739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:09,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:09,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:24:09,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013531999] [2024-11-02 11:24:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:09,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:09,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:09,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:09,171 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:09,207 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-02 11:24:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:09,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 11:24:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:09,208 INFO L225 Difference]: With dead ends: 27 [2024-11-02 11:24:09,208 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 11:24:09,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:09,209 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:09,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:24:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 11:24:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-02 11:24:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-02 11:24:09,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2024-11-02 11:24:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:09,219 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-02 11:24:09,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-02 11:24:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 11:24:09,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:09,220 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:09,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 11:24:09,220 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:09,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:09,221 INFO L85 PathProgramCache]: Analyzing trace with hash 730629379, now seen corresponding path program 1 times [2024-11-02 11:24:09,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:09,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827967533] [2024-11-02 11:24:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:09,868 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 11:24:09,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827967533] [2024-11-02 11:24:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827967533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861313795] [2024-11-02 11:24:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:09,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:09,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:09,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:09,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:24:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:09,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-02 11:24:09,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:10,058 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 11:24:10,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:24:10,277 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 31 treesize of output 25 [2024-11-02 11:24:10,416 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 11:24:10,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:24:10,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-02 11:24:10,754 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 11:24:10,765 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 14 treesize of output 12 [2024-11-02 11:24:10,816 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 11:24:10,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861313795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:24:10,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875548640] [2024-11-02 11:24:10,838 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 11:24:10,839 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:24:10,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:24:10,850 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:24:10,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:24:12,685 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:24:14,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '703#(and (<= 2 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc216#1.base|) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 2 |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc215#1.base|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-02 11:24:14,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:24:14,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:24:14,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-02 11:24:14,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330291658] [2024-11-02 11:24:14,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:24:14,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-02 11:24:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:14,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-02 11:24:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=599, Unknown=3, NotChecked=0, Total=702 [2024-11-02 11:24:14,493 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:15,042 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-02 11:24:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 11:24:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-02 11:24:15,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:15,043 INFO L225 Difference]: With dead ends: 32 [2024-11-02 11:24:15,043 INFO L226 Difference]: Without dead ends: 32 [2024-11-02 11:24:15,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=187, Invalid=1000, Unknown=3, NotChecked=0, Total=1190 [2024-11-02 11:24:15,045 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 114 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:15,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:24:15,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-02 11:24:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2024-11-02 11:24:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-02 11:24:15,051 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2024-11-02 11:24:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:15,052 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-02 11:24:15,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-02 11:24:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 11:24:15,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:15,053 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:15,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 11:24:15,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:15,254 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:15,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1179297172, now seen corresponding path program 1 times [2024-11-02 11:24:15,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:15,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726904685] [2024-11-02 11:24:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:15,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:15,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:15,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726904685] [2024-11-02 11:24:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726904685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:15,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:15,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 11:24:15,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048009732] [2024-11-02 11:24:15,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:15,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 11:24:15,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:15,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 11:24:15,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:24:15,380 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:15,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:15,502 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-02 11:24:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 11:24:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 11:24:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:15,503 INFO L225 Difference]: With dead ends: 26 [2024-11-02 11:24:15,503 INFO L226 Difference]: Without dead ends: 23 [2024-11-02 11:24:15,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-02 11:24:15,504 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:15,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:24:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-02 11:24:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-02 11:24:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 11:24:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-02 11:24:15,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2024-11-02 11:24:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:15,509 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-02 11:24:15,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:15,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-02 11:24:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 11:24:15,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:15,510 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:15,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-02 11:24:15,510 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:15,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2055126427, now seen corresponding path program 1 times [2024-11-02 11:24:15,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:15,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520798797] [2024-11-02 11:24:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:15,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:15,877 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 11:24:15,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:15,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520798797] [2024-11-02 11:24:15,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520798797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:15,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305511567] [2024-11-02 11:24:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:15,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:15,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:15,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:24:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:15,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-02 11:24:15,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:15,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-02 11:24:16,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-02 11:24:16,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-02 11:24:16,450 INFO L349 Elim1Store]: treesize reduction 4, result has 88.6 percent of original size [2024-11-02 11:24:16,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 44 [2024-11-02 11:24:16,566 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 11:24:16,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:24:16,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:24:16,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2024-11-02 11:24:17,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:24:17,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 110 [2024-11-02 11:24:17,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:24:17,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2024-11-02 11:24:17,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-02 11:24:17,226 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 11:24:17,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305511567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:24:17,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329048197] [2024-11-02 11:24:17,229 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-02 11:24:17,231 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:24:17,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:24:17,232 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:24:17,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:24:19,251 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:24:22,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '944#(exists ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.base_28| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_28| Int)) (and (<= 2 |ULTIMATE.start_cstrspn_~s2#1.base|) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrspn_~sc1~0#1.base_28|) (<= 2 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrspn_~sc1~0#1.base_28|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_28|) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_28|) (<= 2 |ULTIMATE.start_main_#t~malloc215#1.base|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0)))' at error location [2024-11-02 11:24:22,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:24:22,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:24:22,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2024-11-02 11:24:22,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500489630] [2024-11-02 11:24:22,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:24:22,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-02 11:24:22,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-02 11:24:22,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1027, Unknown=5, NotChecked=0, Total=1190 [2024-11-02 11:24:22,883 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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 11:24:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:23,364 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2024-11-02 11:24:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 11:24:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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 11:24:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:23,365 INFO L225 Difference]: With dead ends: 64 [2024-11-02 11:24:23,366 INFO L226 Difference]: Without dead ends: 64 [2024-11-02 11:24:23,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=210, Invalid=1425, Unknown=5, NotChecked=0, Total=1640 [2024-11-02 11:24:23,367 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 71 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:23,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 70 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:24:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-02 11:24:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2024-11-02 11:24:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 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 11:24:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-11-02 11:24:23,371 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 13 [2024-11-02 11:24:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:23,372 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-11-02 11:24:23,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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 11:24:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-11-02 11:24:23,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-02 11:24:23,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:23,373 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:23,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:24:23,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:23,575 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:23,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash -630227704, now seen corresponding path program 2 times [2024-11-02 11:24:23,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:23,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396213364] [2024-11-02 11:24:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:23,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:24,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:24,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396213364] [2024-11-02 11:24:24,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396213364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:24,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365942267] [2024-11-02 11:24:24,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 11:24:24,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:24,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:24,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:24,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:24:24,271 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 11:24:24,271 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 11:24:24,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-02 11:24:24,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:24,310 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 11:24:24,893 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-02 11:24:24,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 49 [2024-11-02 11:24:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:25,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:24:25,821 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 27 treesize of output 23 [2024-11-02 11:24:25,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:24:25,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2024-11-02 11:24:25,855 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 11:24:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:25,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365942267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:24:25,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106562067] [2024-11-02 11:24:25,886 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 11:24:25,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:24:25,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:24:25,887 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:24:25,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:24:26,892 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:24:28,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1192#(and (<= 2 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc216#1.base|) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 2 |ULTIMATE.start_cstrspn_~sc1~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc215#1.base|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-02 11:24:28,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:24:28,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:24:28,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 27 [2024-11-02 11:24:28,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529809086] [2024-11-02 11:24:28,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:24:28,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-02 11:24:28,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-02 11:24:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1177, Unknown=3, NotChecked=0, Total=1332 [2024-11-02 11:24:28,576 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:30,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-02 11:24:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:32,276 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2024-11-02 11:24:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-02 11:24:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-02 11:24:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:32,277 INFO L225 Difference]: With dead ends: 93 [2024-11-02 11:24:32,277 INFO L226 Difference]: Without dead ends: 93 [2024-11-02 11:24:32,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=343, Invalid=2104, Unknown=3, NotChecked=0, Total=2450 [2024-11-02 11:24:32,279 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 132 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:32,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 24 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 276 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2024-11-02 11:24:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-02 11:24:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2024-11-02 11:24:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2024-11-02 11:24:32,284 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 15 [2024-11-02 11:24:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:32,284 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2024-11-02 11:24:32,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2024-11-02 11:24:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-02 11:24:32,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:32,285 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:32,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 11:24:32,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:32,488 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 11:24:32,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:32,489 INFO L85 PathProgramCache]: Analyzing trace with hash -853668462, now seen corresponding path program 3 times [2024-11-02 11:24:32,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:32,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616306976] [2024-11-02 11:24:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:33,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:33,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616306976] [2024-11-02 11:24:33,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616306976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:33,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799624764] [2024-11-02 11:24:33,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 11:24:33,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:33,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:33,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:33,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49ce7c8-1829-4719-a619-4fc247e3a481/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 11:24:33,438 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 11:24:33,438 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 11:24:33,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-02 11:24:33,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:33,476 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