./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) 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_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/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_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/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-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:40:16,726 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:40:16,799 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2024-11-02 12:40:16,804 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:40:16,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:40:16,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:40:16,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:40:16,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:40:16,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:40:16,842 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:40:16,842 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:40:16,844 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:40:16,845 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:40:16,845 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:40:16,845 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:40:16,846 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:40:16,846 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:40:16,846 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:40:16,847 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:40:16,847 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:40:16,848 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:40:16,852 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:40:16,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:40:16,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:40:16,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:40:16,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:40:16,854 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:40:16,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:40:16,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:40:16,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:40:16,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:40:16,859 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:40:16,859 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:40:16,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:40:16,859 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:40:16,860 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:40:16,860 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:40:16,860 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:40:16,860 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:40:16,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:40:16,861 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:40:16,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:40:16,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:40:16,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:40:16,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:40:16,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:40:16,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:40:16,863 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:40:16,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:40:16,864 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:40:16,864 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:40:16,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:40:16,865 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_564da064-bdcd-4b77-ba43-3f1893f7efc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2024-11-02 12:40:17,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:40:17,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:40:17,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:40:17,203 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:40:17,207 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:40:17,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i Unable to find full path for "g++" [2024-11-02 12:40:19,341 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:40:19,644 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:40:19,645 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2024-11-02 12:40:19,668 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/data/05ead4bad/401c9e52ed674beab4269dd290e047be/FLAG67ca013bb [2024-11-02 12:40:19,926 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/data/05ead4bad/401c9e52ed674beab4269dd290e047be [2024-11-02 12:40:19,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:40:19,930 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:40:19,932 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:40:19,932 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:40:19,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:40:19,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@339b698a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19, skipping insertion in model container [2024-11-02 12:40:19,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:20,013 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:40:20,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:40:20,425 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:40:20,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:40:20,541 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:40:20,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20 WrapperNode [2024-11-02 12:40:20,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:40:20,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:40:20,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:40:20,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:40:20,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,601 INFO L138 Inliner]: procedures = 129, calls = 41, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 186 [2024-11-02 12:40:20,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:40:20,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:40:20,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:40:20,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:40:20,614 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,631 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,636 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,643 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:40:20,648 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:40:20,648 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:40:20,648 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:40:20,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (1/1) ... [2024-11-02 12:40:20,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:40:20,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:20,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:40:20,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:40:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-02 12:40:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-02 12:40:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:40:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:40:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:40:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:40:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2024-11-02 12:40:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2024-11-02 12:40:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:40:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:40:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 12:40:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:40:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:40:20,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:40:20,866 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:40:20,868 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:40:20,899 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-02 12:40:21,225 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-11-02 12:40:21,226 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:40:21,357 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:40:21,358 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-02 12:40:21,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:40:21 BoogieIcfgContainer [2024-11-02 12:40:21,358 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:40:21,364 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:40:21,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:40:21,386 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:40:21,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:40:19" (1/3) ... [2024-11-02 12:40:21,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb0f481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:40:21, skipping insertion in model container [2024-11-02 12:40:21,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:20" (2/3) ... [2024-11-02 12:40:21,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb0f481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:40:21, skipping insertion in model container [2024-11-02 12:40:21,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:40:21" (3/3) ... [2024-11-02 12:40:21,389 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2024-11-02 12:40:21,404 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:40:21,404 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:40:21,469 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:40:21,477 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;@4ac521d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:40:21,478 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:40:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 35 states have (on average 1.6) internal successors, (56), 38 states have internal predecessors, (56), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:40:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-02 12:40:21,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:21,508 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:21,509 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-02 12:40:21,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash -632531752, now seen corresponding path program 1 times [2024-11-02 12:40:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:21,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567590144] [2024-11-02 12:40:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:22,088 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 12:40:22,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:22,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567590144] [2024-11-02 12:40:22,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567590144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:40:22,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:40:22,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:40:22,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514020361] [2024-11-02 12:40:22,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:40:22,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:40:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:40:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:40:22,135 INFO L87 Difference]: Start difference. First operand has 43 states, 35 states have (on average 1.6) internal successors, (56), 38 states have internal predecessors, (56), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:40:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:22,222 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2024-11-02 12:40:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:40:22,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-02 12:40:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:22,232 INFO L225 Difference]: With dead ends: 48 [2024-11-02 12:40:22,232 INFO L226 Difference]: Without dead ends: 43 [2024-11-02 12:40:22,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:40:22,238 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:22,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:40:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-02 12:40:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2024-11-02 12:40:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 34 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:40:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2024-11-02 12:40:22,281 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 14 [2024-11-02 12:40:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:22,282 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2024-11-02 12:40:22,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:40:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2024-11-02 12:40:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:40:22,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:22,285 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:22,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:40:22,285 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-02 12:40:22,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash 826941586, now seen corresponding path program 1 times [2024-11-02 12:40:22,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:22,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099964730] [2024-11-02 12:40:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:22,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:22,661 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 12:40:22,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:22,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099964730] [2024-11-02 12:40:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099964730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:22,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533724247] [2024-11-02 12:40:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:22,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:22,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:22,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:22,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:40:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:22,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:40:22,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:22,976 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 12:40:22,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:23,105 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 12:40:23,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533724247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:23,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266502476] [2024-11-02 12:40:23,134 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-02 12:40:23,135 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:23,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:23,145 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:23,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:23,975 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2024-11-02 12:40:24,019 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [266502476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:40:24,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:24,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 3, 4] total 17 [2024-11-02 12:40:24,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792995237] [2024-11-02 12:40:24,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:40:24,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:40:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:40:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:40:24,387 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:40:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:24,721 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2024-11-02 12:40:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:40:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-02 12:40:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:24,723 INFO L225 Difference]: With dead ends: 47 [2024-11-02 12:40:24,723 INFO L226 Difference]: Without dead ends: 47 [2024-11-02 12:40:24,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:40:24,725 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:24,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:40:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-02 12:40:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2024-11-02 12:40:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:40:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-11-02 12:40:24,741 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 18 [2024-11-02 12:40:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:24,742 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-11-02 12:40:24,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:40:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-11-02 12:40:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:40:24,743 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:24,743 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:24,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:40:24,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:24,949 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-02 12:40:24,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash 380639624, now seen corresponding path program 1 times [2024-11-02 12:40:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:24,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286357291] [2024-11-02 12:40:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:40:25,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:25,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286357291] [2024-11-02 12:40:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286357291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:25,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538484121] [2024-11-02 12:40:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:25,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:25,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:25,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:40:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:25,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:40:25,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:40:25,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:40:25,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538484121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:25,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070672566] [2024-11-02 12:40:25,430 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-02 12:40:25,430 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:25,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:25,432 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:25,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:26,330 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2024-11-02 12:40:26,623 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:30,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '470#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (= 3 |ULTIMATE.start_main_~i~0#1|) (= 5 |ULTIMATE.start_main_~max~0#1|) (exists ((|v_#valid_56| (Array Int Int)) (|v_ULTIMATE.start_main_~#head~1#1.base_24| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#head~1#1.base_24|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#head~1#1.base_24|) 0) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#head~1#1.base_24|) 0) 0) (= (store |v_#valid_56| |v_ULTIMATE.start_main_~#head~1#1.base_24| 0) |#valid|))) (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int))) (|v_#memory_int_73| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_17| Int) (|v_#memory_int_74| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_17| Int) (|v_sll_append_sll_create_~head~0#1.base_30| Int) (|v_#memory_$Pointer$.offset_63| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_int_72| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.base_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 (select (select |v_#memory_$Pointer$.base_64| |v_sll_append_sll_create_~head~0#1.base_30|) 0))) |v_#memory_$Pointer$.base_64|) (not (= |v_sll_append_sll_create_~head~0#1.base_30| 0)) (= (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 0 (select (select |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 0))) |v_#memory_int_40|) (= (select (select (store (store |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (store (select (store |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 4 0) 0 0)) |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) 0) (= |v_#memory_int_39| (store |v_#memory_int_73| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (select |v_#memory_int_73| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 4 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 4)))) (= |v_#memory_int_73| (store |v_#memory_int_72| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_int_72| |v_sll_append_sll_create_~head~0#1.base_30|) 0 (select (select |v_#memory_int_73| |v_sll_append_sll_create_~head~0#1.base_30|) 0)))) (= |#memory_int| (store |v_#memory_int_74| |v_sll_append_~head#1.base_17| (store (select |v_#memory_int_74| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17| (select (select |#memory_int| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)))) (= (select (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 4 |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) 0) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 4 |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) |v_sll_append_~head#1.base_17| (store (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 4 |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)))) (= |#memory_$Pointer$.offset| (store (store (store |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (store (select (store |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 4 0) 0 0)) |v_sll_append_~head#1.base_17| (store (select (store (store |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (store (select (store |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30| (store (select |v_#memory_$Pointer$.offset_63| |v_sll_append_sll_create_~head~0#1.base_30|) 0 0)) (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 4 0) 0 0)) |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17| 0))) (= (store |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|) (store (select |v_#memory_int_40| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 0 (select (select |v_#memory_int_74| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_17|) |v_sll_append_~head#1.offset_17|)) 0))) |v_#memory_int_74|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-02 12:40:30,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:30,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:30,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-02 12:40:30,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535456194] [2024-11-02 12:40:30,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:30,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:40:30,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:40:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=346, Unknown=2, NotChecked=0, Total=420 [2024-11-02 12:40:30,256 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:40:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:30,364 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-11-02 12:40:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:40:30,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-02 12:40:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:30,366 INFO L225 Difference]: With dead ends: 62 [2024-11-02 12:40:30,366 INFO L226 Difference]: Without dead ends: 62 [2024-11-02 12:40:30,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=72, Invalid=346, Unknown=2, NotChecked=0, Total=420 [2024-11-02 12:40:30,367 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:30,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 123 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:40:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-02 12:40:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-11-02 12:40:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-02 12:40:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2024-11-02 12:40:30,375 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 21 [2024-11-02 12:40:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:30,375 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2024-11-02 12:40:30,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:40:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2024-11-02 12:40:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-02 12:40:30,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:30,377 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:30,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:40:30,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:30,578 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-02 12:40:30,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 794428564, now seen corresponding path program 2 times [2024-11-02 12:40:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:30,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049865933] [2024-11-02 12:40:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 12:40:30,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:30,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049865933] [2024-11-02 12:40:30,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049865933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:40:30,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:40:30,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 12:40:30,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146073164] [2024-11-02 12:40:30,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:40:30,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:40:30,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:30,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:40:30,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:40:30,868 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:40:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:31,114 INFO L93 Difference]: Finished difference Result 119 states and 164 transitions. [2024-11-02 12:40:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:40:31,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-11-02 12:40:31,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:31,118 INFO L225 Difference]: With dead ends: 119 [2024-11-02 12:40:31,118 INFO L226 Difference]: Without dead ends: 119 [2024-11-02 12:40:31,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:40:31,120 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 64 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:31,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 202 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:40:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-02 12:40:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 71. [2024-11-02 12:40:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 12:40:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2024-11-02 12:40:31,132 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 29 [2024-11-02 12:40:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:31,132 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2024-11-02 12:40:31,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:40:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2024-11-02 12:40:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 12:40:31,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:31,134 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:31,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:40:31,135 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-02 12:40:31,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1166027575, now seen corresponding path program 1 times [2024-11-02 12:40:31,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:31,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170883462] [2024-11-02 12:40:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:31,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:40:31,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:31,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170883462] [2024-11-02 12:40:31,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170883462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:31,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552628382] [2024-11-02 12:40:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:31,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:31,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:31,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:31,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564da064-bdcd-4b77-ba43-3f1893f7efc8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:40:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:31,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:40:31,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 12:40:31,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 12:40:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552628382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816463440] [2024-11-02 12:40:31,695 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-02 12:40:31,695 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:31,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:31,695 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:31,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:33,150 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 83 for LOIs [2024-11-02 12:40:34,371 INFO L180 IcfgInterpreter]: Interpretation finished