./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/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_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/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 32bit --witnessprinter.graph.data.programhash cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:28:17,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:28:17,121 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 12:28:17,130 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:28:17,130 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:28:17,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:28:17,175 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:28:17,176 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:28:17,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:28:17,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:28:17,177 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:28:17,177 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:28:17,179 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:28:17,184 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:28:17,184 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:28:17,185 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:28:17,185 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:28:17,185 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:28:17,185 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:28:17,186 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:28:17,186 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:28:17,187 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:28:17,187 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:28:17,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:28:17,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:28:17,190 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:28:17,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:28:17,191 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:28:17,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:28:17,192 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:28:17,192 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:28:17,192 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:28:17,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:28:17,193 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:28:17,194 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:28:17,195 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:28:17,195 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:28:17,195 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:28:17,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:28:17,196 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:28:17,196 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:28:17,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:17,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:28:17,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:28:17,199 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:28:17,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:28:17,199 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:28:17,199 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:28:17,200 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:28:17,200 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_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b [2024-11-02 12:28:17,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:28:17,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:28:17,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:28:17,601 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:28:17,602 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:28:17,605 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c Unable to find full path for "g++" [2024-11-02 12:28:19,730 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:28:19,942 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:28:19,942 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2024-11-02 12:28:19,952 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/data/e286ae8c6/a66dc84f962d42de8f842e831946689c/FLAG31f29247f [2024-11-02 12:28:19,973 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/data/e286ae8c6/a66dc84f962d42de8f842e831946689c [2024-11-02 12:28:19,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:28:19,978 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:28:19,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:19,983 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:28:19,990 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:28:19,991 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cba7462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19, skipping insertion in model container [2024-11-02 12:28:19,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:20,019 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:28:20,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:20,265 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:28:20,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:20,297 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:28:20,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20 WrapperNode [2024-11-02 12:28:20,298 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:20,299 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:20,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:28:20,300 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:28:20,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,336 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-11-02 12:28:20,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:20,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:28:20,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:28:20,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:28:20,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,360 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,369 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:28:20,377 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:28:20,377 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:28:20,377 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:28:20,379 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (1/1) ... [2024-11-02 12:28:20,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:20,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:20,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:28:20,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:28:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:28:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:28:20,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:28:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:28:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:28:20,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:28:20,603 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:28:20,606 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:28:20,812 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-11-02 12:28:20,813 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:28:20,856 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:28:20,856 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:28:20,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:20 BoogieIcfgContainer [2024-11-02 12:28:20,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:28:20,862 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:28:20,862 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:28:20,868 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:28:20,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:28:19" (1/3) ... [2024-11-02 12:28:20,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b6dd98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:20, skipping insertion in model container [2024-11-02 12:28:20,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:20" (2/3) ... [2024-11-02 12:28:20,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b6dd98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:20, skipping insertion in model container [2024-11-02 12:28:20,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:20" (3/3) ... [2024-11-02 12:28:20,873 INFO L112 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2024-11-02 12:28:20,935 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:28:20,935 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-02 12:28:21,020 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:28:21,030 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;@129c46d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:28:21,031 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-02 12:28:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:28:21,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:21,053 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:28:21,057 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:21,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:21,066 INFO L85 PathProgramCache]: Analyzing trace with hash 70475, now seen corresponding path program 1 times [2024-11-02 12:28:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:21,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927291602] [2024-11-02 12:28:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:21,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:21,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:21,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927291602] [2024-11-02 12:28:21,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927291602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:21,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:21,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:28:21,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716420573] [2024-11-02 12:28:21,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:21,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:21,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:21,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:21,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:21,448 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:21,515 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2024-11-02 12:28:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:21,522 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 12:28:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:21,539 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:28:21,539 INFO L226 Difference]: Without dead ends: 16 [2024-11-02 12:28:21,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:21,549 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:21,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-02 12:28:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-02 12:28:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-02 12:28:21,594 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2024-11-02 12:28:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:21,595 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-02 12:28:21,596 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 12:28:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-02 12:28:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:28:21,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:21,597 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:28:21,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:28:21,598 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:21,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash 70476, now seen corresponding path program 1 times [2024-11-02 12:28:21,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:21,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146860639] [2024-11-02 12:28:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:21,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:21,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146860639] [2024-11-02 12:28:21,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146860639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:21,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:21,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:28:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405046283] [2024-11-02 12:28:21,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:21,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:21,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:21,765 INFO L87 Difference]: Start difference. First operand 15 states and 16 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 12:28:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:21,815 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2024-11-02 12:28:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:21,815 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 12:28:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:21,816 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:28:21,816 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:28:21,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:21,818 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:21,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:28:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:28:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-02 12:28:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-02 12:28:21,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2024-11-02 12:28:21,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:21,823 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-02 12:28:21,824 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 12:28:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-02 12:28:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:28:21,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:21,825 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-02 12:28:21,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:28:21,825 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:21,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:21,826 INFO L85 PathProgramCache]: Analyzing trace with hash 67757550, now seen corresponding path program 1 times [2024-11-02 12:28:21,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:21,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423509295] [2024-11-02 12:28:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:21,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:22,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:22,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423509295] [2024-11-02 12:28:22,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423509295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:22,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853403294] [2024-11-02 12:28:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:22,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:22,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:22,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:22,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:28:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:22,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 12:28:22,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:22,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-02 12:28:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:22,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:22,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853403294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997452155] [2024-11-02 12:28:22,518 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2024-11-02 12:28:22,518 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:22,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:22,532 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:22,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:22,902 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:23,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '125#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet2#1|)) (<= |ULTIMATE.start_main_#t~nondet2#1| 127) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_20| Int) (|v_ULTIMATE.start_main_~i~0#1_32| Int)) (and (<= 2 |v_ULTIMATE.start_main_~p~0#1.base_20|) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_20|) |v_ULTIMATE.start_main_~i~0#1_32|) (<= |v_ULTIMATE.start_main_~i~0#1_32| 9) (<= 2 |ULTIMATE.start_main_#t~malloc1#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_32|))))' at error location [2024-11-02 12:28:23,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:23,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:23,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-02 12:28:23,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310646829] [2024-11-02 12:28:23,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:23,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:28:23,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:28:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:28:23,072 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:23,173 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-11-02 12:28:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:28:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-02 12:28:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:23,175 INFO L225 Difference]: With dead ends: 23 [2024-11-02 12:28:23,175 INFO L226 Difference]: Without dead ends: 23 [2024-11-02 12:28:23,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:28:23,178 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:23,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-02 12:28:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-02 12:28:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-02 12:28:23,187 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2024-11-02 12:28:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:23,187 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-02 12:28:23,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-02 12:28:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:28:23,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:23,189 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-02 12:28:23,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:28:23,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:23,390 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:23,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash 690527350, now seen corresponding path program 1 times [2024-11-02 12:28:23,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:23,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905107224] [2024-11-02 12:28:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:23,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:28:23,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:23,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905107224] [2024-11-02 12:28:23,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905107224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:23,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:28:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918234393] [2024-11-02 12:28:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:23,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:23,540 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:23,573 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2024-11-02 12:28:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:23,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 12:28:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:23,575 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:28:23,575 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:28:23,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:23,577 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:23,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:28:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:28:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2024-11-02 12:28:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-02 12:28:23,584 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2024-11-02 12:28:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:23,585 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-02 12:28:23,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-02 12:28:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:28:23,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:23,586 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:23,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:28:23,586 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:23,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:23,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1393089744, now seen corresponding path program 1 times [2024-11-02 12:28:23,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:23,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870244418] [2024-11-02 12:28:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:23,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:23,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:23,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870244418] [2024-11-02 12:28:23,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870244418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:23,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25586328] [2024-11-02 12:28:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:23,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:23,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:23,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:23,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:28:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:23,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:28:23,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:23,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:23,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25586328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:23,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299436101] [2024-11-02 12:28:23,793 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:28:23,793 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:23,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:23,794 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:23,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:24,017 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:24,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287#(and (<= 1 |#StackHeapBarrier|) (<= 3 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (<= 2 |ULTIMATE.start_main_~p~0#1.base|) (exists ((|v_ULTIMATE.start_main_#t~malloc1#1.base_10| Int) (|v_#valid_26| (Array Int Int))) (and (= |#valid| (store |v_#valid_26| |v_ULTIMATE.start_main_#t~malloc1#1.base_10| 0)) (<= 2 |v_ULTIMATE.start_main_#t~malloc1#1.base_10|) (= (select |v_#valid_26| |ULTIMATE.start_main_~p~0#1.base|) 1))) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (not (= 97 (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 2))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-02 12:28:24,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:24,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:24,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-02 12:28:24,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279485027] [2024-11-02 12:28:24,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:24,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:28:24,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:28:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2024-11-02 12:28:24,289 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:24,342 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2024-11-02 12:28:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:28:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:28:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:24,346 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:28:24,346 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:28:24,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2024-11-02 12:28:24,347 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:24,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:28:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:28:24,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-02 12:28:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-02 12:28:24,355 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2024-11-02 12:28:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:24,355 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-02 12:28:24,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-02 12:28:24,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 12:28:24,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:24,359 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-11-02 12:28:24,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:28:24,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:24,560 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:24,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1246225708, now seen corresponding path program 2 times [2024-11-02 12:28:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:24,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025893037] [2024-11-02 12:28:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:24,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:24,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:24,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025893037] [2024-11-02 12:28:24,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025893037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:24,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715670403] [2024-11-02 12:28:24,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:28:24,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:24,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:24,884 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:24,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:28:24,947 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:28:24,948 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:28:24,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:28:24,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:24,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-02 12:28:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:28:25,064 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715670403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:25,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-11-02 12:28:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895556425] [2024-11-02 12:28:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:25,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:28:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:25,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:28:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:28:25,067 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:25,095 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2024-11-02 12:28:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:28:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-02 12:28:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:25,097 INFO L225 Difference]: With dead ends: 26 [2024-11-02 12:28:25,097 INFO L226 Difference]: Without dead ends: 26 [2024-11-02 12:28:25,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:28:25,098 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:25,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:28:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-02 12:28:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-11-02 12:28:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-02 12:28:25,102 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2024-11-02 12:28:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:25,102 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-02 12:28:25,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-02 12:28:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:28:25,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:25,103 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:25,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:25,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:25,306 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:25,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1019604312, now seen corresponding path program 2 times [2024-11-02 12:28:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:25,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851399910] [2024-11-02 12:28:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:25,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851399910] [2024-11-02 12:28:25,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851399910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889852773] [2024-11-02 12:28:25,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:28:25,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:25,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:25,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:25,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:28:25,592 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-02 12:28:25,592 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:28:25,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:28:25,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:25,708 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc1#1.base_11| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc1#1.base_11|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc1#1.base_11| 0)))) is different from true [2024-11-02 12:28:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-02 12:28:25,709 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:25,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889852773] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:25,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:25,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-11-02 12:28:25,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466680977] [2024-11-02 12:28:25,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:25,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:28:25,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:25,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:28:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2024-11-02 12:28:25,711 INFO L87 Difference]: Start difference. First operand 23 states and 24 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 12:28:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:25,729 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2024-11-02 12:28:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:28:25,729 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 18 [2024-11-02 12:28:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:25,730 INFO L225 Difference]: With dead ends: 25 [2024-11-02 12:28:25,730 INFO L226 Difference]: Without dead ends: 23 [2024-11-02 12:28:25,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2024-11-02 12:28:25,731 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:25,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 7 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2024-11-02 12:28:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-02 12:28:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-02 12:28:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-11-02 12:28:25,735 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2024-11-02 12:28:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:25,735 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-11-02 12:28:25,736 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 12:28:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-11-02 12:28:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:28:25,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:25,736 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:25,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:25,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:25,943 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:25,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1019612257, now seen corresponding path program 1 times [2024-11-02 12:28:25,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:25,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061039374] [2024-11-02 12:28:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:25,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:26,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:26,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061039374] [2024-11-02 12:28:26,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061039374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:26,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440062976] [2024-11-02 12:28:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:26,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:26,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:26,130 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:26,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:28:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:26,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:28:26,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:26,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:26,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440062976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763937052] [2024-11-02 12:28:26,346 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:28:26,347 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:26,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:26,347 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:26,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:26,501 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:26,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '657#(and (exists ((|v_ULTIMATE.start_main_~p~0#1.base_21| Int)) (and (<= 2 |v_ULTIMATE.start_main_~p~0#1.base_21|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_21|) 1) (= 97 (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_21|) 2)) (<= |#StackHeapBarrier| |v_ULTIMATE.start_main_~p~0#1.base_21|) (<= 3 (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_21|)))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc1#1.base|))' at error location [2024-11-02 12:28:26,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:26,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:26,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-02 12:28:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047709746] [2024-11-02 12:28:26,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:26,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:28:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:28:26,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:28:26,772 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 12:28:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:26,830 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2024-11-02 12:28:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:28:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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) Word has length 18 [2024-11-02 12:28:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:26,831 INFO L225 Difference]: With dead ends: 31 [2024-11-02 12:28:26,832 INFO L226 Difference]: Without dead ends: 31 [2024-11-02 12:28:26,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:28:26,833 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:26,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:28:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-02 12:28:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-02 12:28:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 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 12:28:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2024-11-02 12:28:26,836 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2024-11-02 12:28:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:26,836 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2024-11-02 12:28:26,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 12:28:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2024-11-02 12:28:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 12:28:26,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:26,838 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:26,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:27,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:27,042 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:28:27,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash -617485545, now seen corresponding path program 2 times [2024-11-02 12:28:27,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:27,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115507985] [2024-11-02 12:28:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:27,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:28:27,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-02 12:28:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:28:27,131 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-02 12:28:27,131 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-02 12:28:27,133 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (7 of 8 remaining) [2024-11-02 12:28:27,135 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-11-02 12:28:27,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-11-02 12:28:27,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2024-11-02 12:28:27,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2024-11-02 12:28:27,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (2 of 8 remaining) [2024-11-02 12:28:27,137 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (1 of 8 remaining) [2024-11-02 12:28:27,137 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-02 12:28:27,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 12:28:27,141 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1] [2024-11-02 12:28:27,180 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-02 12:28:27,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 12:28:27 BoogieIcfgContainer [2024-11-02 12:28:27,185 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-02 12:28:27,185 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-02 12:28:27,185 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-02 12:28:27,186 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-02 12:28:27,186 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:20" (3/4) ... [2024-11-02 12:28:27,187 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-02 12:28:27,242 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/witness.graphml [2024-11-02 12:28:27,242 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-02 12:28:27,243 INFO L158 Benchmark]: Toolchain (without parser) took 7264.53ms. Allocated memory was 134.2MB in the beginning and 188.7MB in the end (delta: 54.5MB). Free memory was 92.7MB in the beginning and 49.2MB in the end (delta: 43.4MB). Peak memory consumption was 98.3MB. Max. memory is 16.1GB. [2024-11-02 12:28:27,243 INFO L158 Benchmark]: CDTParser took 2.23ms. Allocated memory is still 134.2MB. Free memory is still 108.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:28:27,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.05ms. Allocated memory is still 134.2MB. Free memory was 92.7MB in the beginning and 81.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-02 12:28:27,244 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.62ms. Allocated memory is still 134.2MB. Free memory was 81.0MB in the beginning and 79.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:28:27,244 INFO L158 Benchmark]: Boogie Preprocessor took 34.71ms. Allocated memory is still 134.2MB. Free memory was 79.7MB in the beginning and 78.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:28:27,245 INFO L158 Benchmark]: RCFGBuilder took 480.24ms. Allocated memory is still 134.2MB. Free memory was 78.4MB in the beginning and 66.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-02 12:28:27,245 INFO L158 Benchmark]: TraceAbstraction took 6322.77ms. Allocated memory was 134.2MB in the beginning and 188.7MB in the end (delta: 54.5MB). Free memory was 66.0MB in the beginning and 51.3MB in the end (delta: 14.7MB). Peak memory consumption was 71.1MB. Max. memory is 16.1GB. [2024-11-02 12:28:27,245 INFO L158 Benchmark]: Witness Printer took 57.04ms. Allocated memory is still 188.7MB. Free memory was 51.3MB in the beginning and 49.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:28:27,248 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.23ms. Allocated memory is still 134.2MB. Free memory is still 108.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 317.05ms. Allocated memory is still 134.2MB. Free memory was 92.7MB in the beginning and 81.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.62ms. Allocated memory is still 134.2MB. Free memory was 81.0MB in the beginning and 79.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.71ms. Allocated memory is still 134.2MB. Free memory was 79.7MB in the beginning and 78.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 480.24ms. Allocated memory is still 134.2MB. Free memory was 78.4MB in the beginning and 66.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6322.77ms. Allocated memory was 134.2MB in the beginning and 188.7MB in the end (delta: 54.5MB). Free memory was 66.0MB in the beginning and 51.3MB in the end (delta: 14.7MB). Peak memory consumption was 71.1MB. Max. memory is 16.1GB. * Witness Printer took 57.04ms. Allocated memory is still 188.7MB. Free memory was 51.3MB in the beginning and 49.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; VAL [i=0, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=1, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=2, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=3, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=4, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=5, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=6, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=7, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=8, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=9, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [i=10, p={11:0}] [L9] COND FALSE !(i < 10) [L13] EXPR p[2] VAL [p={11:0}] [L13] COND TRUE p[2] == 'a' [L14] free(p) [L14] free(p) - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 6.2s, OverallIterations: 9, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 158 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 88 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 162 IncrementalHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 70 mSDtfsCounter, 162 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=8, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 163 NumberOfCodeBlocks, 145 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 154 ConstructedInterpolants, 1 QuantifiedInterpolants, 938 SizeOfPredicates, 3 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 72/242 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-02 12:28:27,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7a3cd4-f356-4e85-9c0d-9b02e366d90f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)