./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.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_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/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_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/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_45a0f987-cb64-4ad5-ab62-011d9e999de7/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 0c9e9bbe7dcc8bff15d80e0cdda24a07d629fdcc505b89526a3de5ae567627e5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:31:06,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:31:06,369 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 12:31:06,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:31:06,379 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:31:06,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:31:06,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:31:06,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:31:06,431 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:31:06,431 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:31:06,432 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:31:06,433 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:31:06,433 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:31:06,435 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:31:06,436 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:31:06,436 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:31:06,436 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:31:06,441 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:31:06,441 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:31:06,442 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:31:06,442 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:31:06,443 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:31:06,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:31:06,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:31:06,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:31:06,444 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:31:06,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:31:06,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:31:06,463 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:31:06,463 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:31:06,463 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:31:06,464 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:31:06,464 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:31:06,464 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:31:06,464 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:31:06,464 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:31:06,465 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:31:06,465 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:31:06,465 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:31:06,465 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:31:06,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:31:06,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:31:06,466 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:31:06,467 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:31:06,467 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:31:06,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:31:06,467 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:31:06,468 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:31:06,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:31:06,468 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_45a0f987-cb64-4ad5-ab62-011d9e999de7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c9e9bbe7dcc8bff15d80e0cdda24a07d629fdcc505b89526a3de5ae567627e5 [2024-11-02 12:31:06,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:31:06,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:31:06,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:31:06,800 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:31:06,801 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:31:06,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c Unable to find full path for "g++" [2024-11-02 12:31:08,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:31:09,164 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:31:09,164 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2024-11-02 12:31:09,171 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/data/7dc6cf6e2/55d6708a15184df7b856bd282e526dc7/FLAG9bb8583e5 [2024-11-02 12:31:09,567 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/data/7dc6cf6e2/55d6708a15184df7b856bd282e526dc7 [2024-11-02 12:31:09,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:31:09,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:31:09,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:31:09,574 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:31:09,580 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:31:09,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,582 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d20acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09, skipping insertion in model container [2024-11-02 12:31:09,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,608 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:31:09,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:31:09,865 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:31:09,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:31:09,897 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:31:09,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09 WrapperNode [2024-11-02 12:31:09,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:31:09,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:31:09,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:31:09,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:31:09,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,927 INFO L138 Inliner]: procedures = 7, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2024-11-02 12:31:09,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:31:09,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:31:09,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:31:09,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:31:09,938 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,952 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:31:09,953 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:31:09,953 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:31:09,953 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:31:09,955 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (1/1) ... [2024-11-02 12:31:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:31:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:09,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:31:10,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:31:10,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:31:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:31:10,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:31:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:31:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:31:10,123 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:31:10,127 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:31:10,283 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-02 12:31:10,283 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:31:10,321 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:31:10,322 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:31:10,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:31:10 BoogieIcfgContainer [2024-11-02 12:31:10,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:31:10,329 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:31:10,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:31:10,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:31:10,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:31:09" (1/3) ... [2024-11-02 12:31:10,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b0fa6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:31:10, skipping insertion in model container [2024-11-02 12:31:10,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:09" (2/3) ... [2024-11-02 12:31:10,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b0fa6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:31:10, skipping insertion in model container [2024-11-02 12:31:10,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:31:10" (3/3) ... [2024-11-02 12:31:10,340 INFO L112 eAbstractionObserver]: Analyzing ICFG derefInLoop1.c [2024-11-02 12:31:10,364 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:31:10,365 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-11-02 12:31:10,421 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:31:10,427 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;@3b3b3c25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:31:10,428 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-02 12:31:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:31:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:31:10,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:10,441 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:31:10,442 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-02 12:31:10,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:10,450 INFO L85 PathProgramCache]: Analyzing trace with hash 61656, now seen corresponding path program 1 times [2024-11-02 12:31:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:10,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458887015] [2024-11-02 12:31:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:10,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:10,631 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 12:31:10,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:10,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458887015] [2024-11-02 12:31:10,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458887015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:10,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:31:10,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:31:10,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216300533] [2024-11-02 12:31:10,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:10,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:31:10,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:10,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:31:10,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:31:10,672 INFO L87 Difference]: Start difference. First operand has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) 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 12:31:10,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:10,716 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2024-11-02 12:31:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:31:10,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 12:31:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:10,725 INFO L225 Difference]: With dead ends: 13 [2024-11-02 12:31:10,726 INFO L226 Difference]: Without dead ends: 12 [2024-11-02 12:31:10,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:31:10,732 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:10,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:31:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-02 12:31:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2024-11-02 12:31:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:31:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-11-02 12:31:10,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 3 [2024-11-02 12:31:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:10,779 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-11-02 12:31:10,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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 12:31:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-11-02 12:31:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:31:10,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:10,780 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:31:10,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:31:10,780 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-02 12:31:10,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1813289910, now seen corresponding path program 1 times [2024-11-02 12:31:10,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:10,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779146723] [2024-11-02 12:31:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:10,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:31:10,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:10,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779146723] [2024-11-02 12:31:10,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779146723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:31:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89912175] [2024-11-02 12:31:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:31:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:10,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:31:10,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:31:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:10,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:31:10,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:31:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:31:11,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:31:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:31:11,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89912175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:31:11,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [803036947] [2024-11-02 12:31:11,090 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:31:11,091 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:31:11,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:31:11,104 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:31:11,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:31:11,480 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:31:11,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [803036947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:11,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:31:11,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2024-11-02 12:31:11,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656474599] [2024-11-02 12:31:11,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:11,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:31:11,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:11,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:31:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:31:11,725 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.2) 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 12:31:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:11,839 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2024-11-02 12:31:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:31:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) 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 6 [2024-11-02 12:31:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:11,841 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:31:11,841 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:31:11,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:31:11,842 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:11,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:31:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:31:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2024-11-02 12:31:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 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 12:31:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-02 12:31:11,847 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2024-11-02 12:31:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:11,847 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-02 12:31:11,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) 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 12:31:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-02 12:31:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:31:11,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:11,848 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-02 12:31:11,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:31:12,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-02 12:31:12,053 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-02 12:31:12,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash 377387951, now seen corresponding path program 1 times [2024-11-02 12:31:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:12,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336778732] [2024-11-02 12:31:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:12,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:31:12,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-02 12:31:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:31:12,127 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-02 12:31:12,128 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-02 12:31:12,132 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 3 remaining) [2024-11-02 12:31:12,134 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2024-11-02 12:31:12,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 3 remaining) [2024-11-02 12:31:12,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:31:12,140 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-02 12:31:12,163 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-02 12:31:12,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 12:31:12 BoogieIcfgContainer [2024-11-02 12:31:12,167 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-02 12:31:12,168 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-02 12:31:12,168 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-02 12:31:12,169 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-02 12:31:12,170 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:31:10" (3/4) ... [2024-11-02 12:31:12,171 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-02 12:31:12,214 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/witness.graphml [2024-11-02 12:31:12,214 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-02 12:31:12,215 INFO L158 Benchmark]: Toolchain (without parser) took 2642.79ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 101.0MB in the beginning and 111.2MB in the end (delta: -10.2MB). Peak memory consumption was 43.3MB. Max. memory is 16.1GB. [2024-11-02 12:31:12,215 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 142.6MB. Free memory is still 108.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:31:12,215 INFO L158 Benchmark]: CACSL2BoogieTranslator took 324.05ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 88.9MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-02 12:31:12,216 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.39ms. Allocated memory is still 142.6MB. Free memory was 88.9MB in the beginning and 87.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:31:12,216 INFO L158 Benchmark]: Boogie Preprocessor took 24.15ms. Allocated memory is still 142.6MB. Free memory was 87.3MB in the beginning and 86.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:31:12,216 INFO L158 Benchmark]: RCFGBuilder took 373.79ms. Allocated memory is still 142.6MB. Free memory was 86.3MB in the beginning and 76.0MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-02 12:31:12,217 INFO L158 Benchmark]: TraceAbstraction took 1838.54ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 75.3MB in the beginning and 112.3MB in the end (delta: -37.0MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2024-11-02 12:31:12,217 INFO L158 Benchmark]: Witness Printer took 45.85ms. Allocated memory is still 192.9MB. Free memory was 112.3MB in the beginning and 111.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:31:12,223 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 142.6MB. Free memory is still 108.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 324.05ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 88.9MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.39ms. Allocated memory is still 142.6MB. Free memory was 88.9MB in the beginning and 87.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.15ms. Allocated memory is still 142.6MB. Free memory was 87.3MB in the beginning and 86.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 373.79ms. Allocated memory is still 142.6MB. Free memory was 86.3MB in the beginning and 76.0MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1838.54ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 75.3MB in the beginning and 112.3MB in the end (delta: -37.0MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * Witness Printer took 45.85ms. Allocated memory is still 192.9MB. Free memory was 112.3MB in the beginning and 111.2MB in the end (delta: 1.1MB). 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: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 2 [L4] int a[10]; VAL [a={3:0}, i=0] [L5] COND TRUE i == 0 [L6] p = a VAL [i=0, p={3:0}] [L3] i++ VAL [i=1, p={3:0}] [L3] COND TRUE i < 2 [L4] int a[10]; VAL [a={2:0}, i=1, p={3:0}] [L5] COND FALSE !(i == 0) VAL [a={2:0}, i=1, p={3:0}] [L8] p[0] = 1 - 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 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, 10 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 52 IncrementalHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 6 mSDtfsCounter, 52 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=2, InterpolantAutomatonStates: 8, 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, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 43 SizeOfPredicates, 0 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 4, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 10, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 20, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 4, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 32, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-02 12:31:12,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45a0f987-cb64-4ad5-ab62-011d9e999de7/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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-deref)