./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/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_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX --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 0.2.3-dev-cf1a783 [2023-11-12 00:44:45,886 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:44:46,009 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2023-11-12 00:44:46,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:44:46,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:44:46,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:44:46,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:44:46,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:44:46,059 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:44:46,064 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:44:46,064 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:44:46,065 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:44:46,066 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:44:46,068 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:44:46,068 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:44:46,069 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:44:46,071 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:44:46,071 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:44:46,072 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:44:46,072 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:44:46,073 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:44:46,073 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:44:46,074 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:44:46,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:44:46,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:44:46,076 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:44:46,077 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:44:46,077 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:44:46,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:44:46,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:44:46,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:44:46,080 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:44:46,080 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:44:46,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:44:46,081 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:44:46,081 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:44:46,082 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:44:46,082 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:44:46,082 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:44:46,083 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:44:46,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:44:46,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:44:46,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:44:46,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:44:46,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:44:46,085 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:44:46,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:44:46,086 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:44:46,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:44:46,086 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_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2023-11-12 00:44:46,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:44:46,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:44:46,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:44:46,446 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:44:46,446 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:44:46,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-11-12 00:44:49,592 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:44:49,913 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:44:49,914 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-11-12 00:44:49,932 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/data/3cc7dcba1/9acf5207ef394e25a893366bf52f7498/FLAG375ddb89b [2023-11-12 00:44:49,945 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/data/3cc7dcba1/9acf5207ef394e25a893366bf52f7498 [2023-11-12 00:44:49,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:44:49,950 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:44:49,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:44:49,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:44:49,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:44:49,960 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:44:49" (1/1) ... [2023-11-12 00:44:49,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b5f6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:49, skipping insertion in model container [2023-11-12 00:44:49,962 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:44:49" (1/1) ... [2023-11-12 00:44:50,016 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:44:50,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:44:50,399 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:44:50,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:44:50,509 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:44:50,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50 WrapperNode [2023-11-12 00:44:50,509 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:44:50,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:44:50,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:44:50,511 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:44:50,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,562 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,604 INFO L138 Inliner]: procedures = 129, calls = 41, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 187 [2023-11-12 00:44:50,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:44:50,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:44:50,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:44:50,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:44:50,616 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,620 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,621 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:44:50,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:44:50,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:44:50,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:44:50,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (1/1) ... [2023-11-12 00:44:50,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:44:50,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:44:50,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:44:50,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-12 00:44:50,720 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-12 00:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:44:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:44:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:44:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2023-11-12 00:44:50,721 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2023-11-12 00:44:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:44:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:44:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:44:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:44:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:44:50,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:44:50,860 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:44:50,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:44:50,905 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-12 00:44:51,230 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:44:51,312 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:44:51,312 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-12 00:44:51,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:44:51 BoogieIcfgContainer [2023-11-12 00:44:51,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:44:51,318 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:44:51,318 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:44:51,322 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:44:51,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:44:49" (1/3) ... [2023-11-12 00:44:51,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd66c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:44:51, skipping insertion in model container [2023-11-12 00:44:51,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:50" (2/3) ... [2023-11-12 00:44:51,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd66c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:44:51, skipping insertion in model container [2023-11-12 00:44:51,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:44:51" (3/3) ... [2023-11-12 00:44:51,331 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2023-11-12 00:44:51,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:44:51,352 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:44:51,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:44:51,426 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@494e17e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:44:51,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:44:51,432 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) [2023-11-12 00:44:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:44:51,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:44:51,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:44:51,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:44:51,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:44:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash -126973127, now seen corresponding path program 1 times [2023-11-12 00:44:51,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:44:51,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444534469] [2023-11-12 00:44:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:44:51,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:44:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:44:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:44:52,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:44:52,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444534469] [2023-11-12 00:44:52,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444534469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:44:52,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:44:52,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:44:52,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664832220] [2023-11-12 00:44:52,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:44:52,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:44:52,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:44:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:44:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:44:52,043 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) [2023-11-12 00:44:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:44:52,142 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-11-12 00:44:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:44:52,146 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 [2023-11-12 00:44:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:44:52,154 INFO L225 Difference]: With dead ends: 48 [2023-11-12 00:44:52,154 INFO L226 Difference]: Without dead ends: 43 [2023-11-12 00:44:52,157 INFO L412 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 [2023-11-12 00:44:52,165 INFO L413 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 [2023-11-12 00:44:52,166 INFO L414 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] [2023-11-12 00:44:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-12 00:44:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-11-12 00:44:52,212 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) [2023-11-12 00:44:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2023-11-12 00:44:52,215 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 14 [2023-11-12 00:44:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:44:52,216 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2023-11-12 00:44:52,217 INFO L496 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) [2023-11-12 00:44:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2023-11-12 00:44:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:44:52,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:44:52,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:44:52,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:44:52,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:44:52,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:44:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1824013939, now seen corresponding path program 1 times [2023-11-12 00:44:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:44:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839268233] [2023-11-12 00:44:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:44:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:44:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:44:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:44:52,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:44:52,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839268233] [2023-11-12 00:44:52,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839268233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:44:52,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851136267] [2023-11-12 00:44:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:44:52,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:44:52,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:44:52,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:44:52,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:44:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:44:52,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:44:52,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:44:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:44:52,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:44:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:44:52,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851136267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:44:52,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [997747192] [2023-11-12 00:44:52,964 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-12 00:44:52,964 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:44:52,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:44:52,975 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:44:52,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:44:53,919 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-11-12 00:44:53,968 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:44:54,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [997747192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:44:54,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:44:54,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 3, 4] total 18 [2023-11-12 00:44:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387827706] [2023-11-12 00:44:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:44:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:44:54,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:44:54,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:44:54,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:44:54,413 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2023-11-12 00:44:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:44:54,733 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-11-12 00:44:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:44:54,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 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 [2023-11-12 00:44:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:44:54,737 INFO L225 Difference]: With dead ends: 51 [2023-11-12 00:44:54,737 INFO L226 Difference]: Without dead ends: 51 [2023-11-12 00:44:54,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:44:54,741 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:44:54,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 82 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:44:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-12 00:44:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2023-11-12 00:44:54,756 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) [2023-11-12 00:44:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2023-11-12 00:44:54,759 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 18 [2023-11-12 00:44:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:44:54,760 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2023-11-12 00:44:54,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2023-11-12 00:44:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2023-11-12 00:44:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:44:54,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:44:54,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:44:54,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:44:54,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:44:54,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:44:54,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:44:54,974 INFO L85 PathProgramCache]: Analyzing trace with hash 169288711, now seen corresponding path program 1 times [2023-11-12 00:44:54,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:44:54,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111683337] [2023-11-12 00:44:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:44:54,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:44:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:44:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:44:55,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:44:55,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111683337] [2023-11-12 00:44:55,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111683337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:44:55,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76870082] [2023-11-12 00:44:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:44:55,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:44:55,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:44:55,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:44:55,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:44:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:44:55,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:44:55,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:44:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:44:55,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:44:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:44:55,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76870082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:44:55,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178434665] [2023-11-12 00:44:55,405 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-12 00:44:55,405 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:44:55,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:44:55,406 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:44:55,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:44:56,635 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-11-12 00:44:57,233 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:02,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '475#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_BEFORE_RETURN_3| Int) (|v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_3| Int) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_BEFORE_RETURN_3| Int) (|v_#memory_int_72| (Array Int (Array Int Int)))) (and (= |v_#memory_int_39| (store |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 0 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 0)))) (= |#memory_int| (store |v_#memory_int_73| |v_sll_append_~head#1.base_BEFORE_RETURN_3| (store (select |v_#memory_int_73| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3| (select (select |#memory_int| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)))) (= (select (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_3|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) 0) (= (store (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_3|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3| (store (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_3|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3| (store (select (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3| 0))) (= (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 0 (select (select |v_#memory_int_73| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 0))) |v_#memory_int_73|) (= (select (select (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) 0) (= (store |v_#memory_int_72| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (select |v_#memory_int_72| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 (select (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4))) |v_#memory_int_38|))) (exists ((|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int))) (|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_BEFORE_RETURN_4| Int) (|v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_4| Int) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_BEFORE_RETURN_4| Int) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_int_72| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_4|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) 0) (= |v_#memory_int_39| (store |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 0 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 0)))) (= (select (select (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) 0) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4| (store (select (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4| 0))) (= (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 0 (select (select |v_#memory_int_73| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 0))) |v_#memory_int_73|) (= (store (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_4|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4| (store (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_4|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|))) |#memory_$Pointer$.base|) (= |v_#memory_int_38| (store |v_#memory_int_72| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (select |v_#memory_int_72| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 (select (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4)))) (= |#memory_int| (store |v_#memory_int_73| |v_sll_append_~head#1.base_BEFORE_RETURN_4| (store (select |v_#memory_int_73| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4| (select (select |#memory_int| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|))))))) (= 3 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| 0) (exists ((|v_#valid_56| (Array Int Int)) (|v_ULTIMATE.start_main_~#head~1#1.base_24| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#head~1#1.base_24|) (= (select (select |#memory_$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|))) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-11-12 00:45:02,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:02,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:02,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-12 00:45:02,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546083367] [2023-11-12 00:45:02,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:02,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:45:02,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:45:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:45:02,642 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) [2023-11-12 00:45:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:02,758 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2023-11-12 00:45:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:45:02,759 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 [2023-11-12 00:45:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:02,761 INFO L225 Difference]: With dead ends: 66 [2023-11-12 00:45:02,761 INFO L226 Difference]: Without dead ends: 66 [2023-11-12 00:45:02,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:45:02,763 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:02,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 148 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:45:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-12 00:45:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2023-11-12 00:45:02,770 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) [2023-11-12 00:45:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2023-11-12 00:45:02,772 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 21 [2023-11-12 00:45:02,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:02,772 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2023-11-12 00:45:02,773 INFO L496 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) [2023-11-12 00:45:02,773 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2023-11-12 00:45:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:45:02,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:02,775 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:02,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:45:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:02,981 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:45:02,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:02,981 INFO L85 PathProgramCache]: Analyzing trace with hash 101326867, now seen corresponding path program 2 times [2023-11-12 00:45:02,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:02,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77177795] [2023-11-12 00:45:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:02,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:45:03,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:03,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77177795] [2023-11-12 00:45:03,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77177795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:03,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:03,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:45:03,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503157624] [2023-11-12 00:45:03,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:03,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:45:03,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:03,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:45:03,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:03,244 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) [2023-11-12 00:45:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:03,488 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2023-11-12 00:45:03,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:45:03,490 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 [2023-11-12 00:45:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:03,494 INFO L225 Difference]: With dead ends: 121 [2023-11-12 00:45:03,495 INFO L226 Difference]: Without dead ends: 121 [2023-11-12 00:45:03,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:45:03,496 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 72 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:03,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 191 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:45:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-12 00:45:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 71. [2023-11-12 00:45:03,509 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) [2023-11-12 00:45:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2023-11-12 00:45:03,510 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 29 [2023-11-12 00:45:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:03,511 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2023-11-12 00:45:03,511 INFO L496 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) [2023-11-12 00:45:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2023-11-12 00:45:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 00:45:03,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:03,513 INFO L195 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] [2023-11-12 00:45:03,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:45:03,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:45:03,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1516827512, now seen corresponding path program 1 times [2023-11-12 00:45:03,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:03,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058781808] [2023-11-12 00:45:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:03,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:45:03,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:03,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058781808] [2023-11-12 00:45:03,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058781808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:03,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697816909] [2023-11-12 00:45:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:03,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:03,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:03,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:03,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:45:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:03,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:45:03,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:45:03,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:45:04,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697816909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:04,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865687677] [2023-11-12 00:45:04,074 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-12 00:45:04,074 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:04,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:04,074 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:04,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:05,130 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 83 for LOIs [2023-11-12 00:45:07,255 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:09,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [865687677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:09,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:09,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 7, 7] total 27 [2023-11-12 00:45:09,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890921061] [2023-11-12 00:45:09,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:09,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 00:45:09,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 00:45:09,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:45:09,611 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 13 states have internal predecessors, (21), 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) [2023-11-12 00:45:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:12,379 INFO L93 Difference]: Finished difference Result 172 states and 241 transitions. [2023-11-12 00:45:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 00:45:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 13 states have internal predecessors, (21), 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 31 [2023-11-12 00:45:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:12,382 INFO L225 Difference]: With dead ends: 172 [2023-11-12 00:45:12,382 INFO L226 Difference]: Without dead ends: 172 [2023-11-12 00:45:12,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:45:12,384 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:12,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 208 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 787 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-12 00:45:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-12 00:45:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 99. [2023-11-12 00:45:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 88 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-12 00:45:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2023-11-12 00:45:12,402 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 31 [2023-11-12 00:45:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:12,402 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2023-11-12 00:45:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 13 states have internal predecessors, (21), 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) [2023-11-12 00:45:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2023-11-12 00:45:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 00:45:12,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:12,405 INFO L195 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, 1] [2023-11-12 00:45:12,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:45:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:12,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:45:12,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash -982321567, now seen corresponding path program 1 times [2023-11-12 00:45:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:12,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588353693] [2023-11-12 00:45:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:12,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:45:12,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:12,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588353693] [2023-11-12 00:45:12,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588353693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958515223] [2023-11-12 00:45:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:12,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:12,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:12,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:45:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:13,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:45:13,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:45:13,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:45:13,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958515223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:13,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1027918594] [2023-11-12 00:45:13,301 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:45:13,301 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:13,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:13,302 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:13,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:14,599 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-11-12 00:45:15,122 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:47,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1503#(and (or (exists ((|v_#memory_$Pointer$.offset_105| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_BEFORE_RETURN_8| Int) (|v_#memory_int_125| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| Int) (|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int))) (|v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| Int) (|v_#memory_int_123| (Array Int (Array Int Int))) (|v_#memory_int_124| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_BEFORE_RETURN_8| Int)) (and (= |v_#memory_int_125| (store |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 0 (select (select |v_#memory_int_125| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 0)))) (= |v_#memory_int_38| (store |v_#memory_int_124| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (select |v_#memory_int_124| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 (select (select |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4)))) (= |v_#memory_int_39| (store |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (select |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 0 (select (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 0)))) (= (store |v_#memory_int_123| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_int_123| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 (select (select |v_#memory_int_124| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0))) |v_#memory_int_124|) (= (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) 0) (= (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) 0) (= |#memory_$Pointer$.offset| (store (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) (store (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) 0))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) (store (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|))) (not (= |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| 0)) (or (not (= (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) 0)) (not (= (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) 0))) (= (store |v_#memory_$Pointer$.base_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.base_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 (select (select |v_#memory_$Pointer$.base_106| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0))) |v_#memory_$Pointer$.base_106|) (= |#memory_int| (store |v_#memory_int_125| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) (store (select |v_#memory_int_125| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) (select (select |#memory_int| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|))))))) (exists ((|v_#memory_$Pointer$.offset_105| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_BEFORE_RETURN_7| Int) (|v_#memory_int_125| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| Int) (|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int))) (|v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| Int) (|v_#memory_int_123| (Array Int (Array Int Int))) (|v_#memory_int_124| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_BEFORE_RETURN_7| Int)) (and (= |v_#memory_int_39| (store |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (select |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 0 (select (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 0)))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) (store (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|))) (= (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) 0) (= |#memory_int| (store |v_#memory_int_125| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) (store (select |v_#memory_int_125| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) (select (select |#memory_int| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|))))) (or (not (= 0 (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|))) (not (= (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) 0))) (= (store |v_#memory_int_123| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_int_123| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 (select (select |v_#memory_int_124| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0))) |v_#memory_int_124|) (= (store |v_#memory_int_124| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (select |v_#memory_int_124| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 (select (select |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4))) |v_#memory_int_38|) (not (= |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| 0)) (= |#memory_$Pointer$.offset| (store (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) (store (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) 0))) (= (store |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 0 (select (select |v_#memory_int_125| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 0))) |v_#memory_int_125|) (= (store |v_#memory_$Pointer$.base_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.base_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 (select (select |v_#memory_$Pointer$.base_106| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0))) |v_#memory_$Pointer$.base_106|) (= (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) 0)))) (<= 1 |#StackHeapBarrier|) (= 3 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| 0) (exists ((|v_#valid_94| (Array Int Int)) (|v_ULTIMATE.start_main_~#head~1#1.base_25| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#head~1#1.base_25|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#head~1#1.base_25|) 0) 0) (= (store |v_#valid_94| |v_ULTIMATE.start_main_~#head~1#1.base_25| 0) |#valid|) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#head~1#1.base_25|) 0)))) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-11-12 00:45:47,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:47,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:47,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-11-12 00:45:47,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362897065] [2023-11-12 00:45:47,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:47,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:45:47,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:45:47,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=918, Unknown=5, NotChecked=0, Total=1056 [2023-11-12 00:45:47,196 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:45:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:47,488 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2023-11-12 00:45:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:45:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-12 00:45:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:47,490 INFO L225 Difference]: With dead ends: 121 [2023-11-12 00:45:47,490 INFO L226 Difference]: Without dead ends: 118 [2023-11-12 00:45:47,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=159, Invalid=1096, Unknown=5, NotChecked=0, Total=1260 [2023-11-12 00:45:47,492 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 73 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:47,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 201 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:45:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-12 00:45:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2023-11-12 00:45:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.3267326732673268) internal successors, (134), 101 states have internal predecessors, (134), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-12 00:45:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 151 transitions. [2023-11-12 00:45:47,505 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 151 transitions. Word has length 32 [2023-11-12 00:45:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:47,505 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 151 transitions. [2023-11-12 00:45:47,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:45:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 151 transitions. [2023-11-12 00:45:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 00:45:47,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:47,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:47,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:47,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:45:47,715 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:45:47,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash 781985677, now seen corresponding path program 2 times [2023-11-12 00:45:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:47,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024378010] [2023-11-12 00:45:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:47,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:45:47,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:47,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024378010] [2023-11-12 00:45:47,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024378010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:47,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350159905] [2023-11-12 00:45:47,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:45:47,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:47,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:47,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:48,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4fd9fa5-b548-4c49-a884-3ffd6e803752/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:45:48,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 00:45:48,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:48,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-12 00:45:48,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:48,580 INFO L322 Elim1Store]: treesize reduction 14, result has 56.3 percent of original size [2023-11-12 00:45:48,581 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 85 [2023-11-12 00:45:48,622 INFO L322 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2023-11-12 00:45:48,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 52 [2023-11-12 00:45:48,667 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-12 00:45:48,757 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-12 00:45:48,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2023-11-12 00:45:48,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-11-12 00:45:48,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2023-11-12 00:45:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:45:49,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:49,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350159905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:49,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:45:49,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2023-11-12 00:45:49,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904467285] [2023-11-12 00:45:49,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:45:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:45:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:45:49,006 INFO L87 Difference]: Start difference. First operand 112 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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)