./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/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_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ --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-9bd2c7f [2023-11-19 05:07:42,573 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:07:42,682 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2023-11-19 05:07:42,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:07:42,698 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:07:42,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:07:42,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:07:42,741 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:07:42,742 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:07:42,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:07:42,747 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:07:42,748 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:07:42,749 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:07:42,750 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:07:42,751 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:07:42,751 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:07:42,752 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:07:42,752 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:07:42,752 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:07:42,753 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:07:42,753 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:07:42,754 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:07:42,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:07:42,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:07:42,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:07:42,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:07:42,757 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:07:42,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:07:42,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:07:42,758 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:07:42,759 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:07:42,759 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:07:42,760 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:07:42,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:07:42,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:07:42,760 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:07:42,761 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:07:42,761 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:07:42,761 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:07:42,761 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:07:42,762 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:07:42,762 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:07:42,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:07:42,763 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:07:42,763 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:07:42,763 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:07:42,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:07:42,763 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:07:42,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:07:42,764 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_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2023-11-19 05:07:42,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:07:43,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:07:43,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:07:43,018 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:07:43,018 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:07:43,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-11-19 05:07:46,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:07:46,320 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:07:46,321 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-11-19 05:07:46,339 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/data/3ee623a17/bd6398891dd14bd19dbf2ead82188651/FLAG2b01ed554 [2023-11-19 05:07:46,362 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/data/3ee623a17/bd6398891dd14bd19dbf2ead82188651 [2023-11-19 05:07:46,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:07:46,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:07:46,379 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:07:46,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:07:46,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:07:46,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:46,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47742339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46, skipping insertion in model container [2023-11-19 05:07:46,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:46,436 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:07:46,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:07:46,816 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:07:46,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:07:46,926 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:07:46,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46 WrapperNode [2023-11-19 05:07:46,927 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:07:46,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:07:46,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:07:46,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:07:46,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:46,952 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:46,979 INFO L138 Inliner]: procedures = 129, calls = 41, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 187 [2023-11-19 05:07:46,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:07:46,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:07:46,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:07:46,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:07:46,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:46,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:46,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:46,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:47,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:47,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:47,015 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:47,017 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:47,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:07:47,022 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:07:47,022 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:07:47,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:07:47,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (1/1) ... [2023-11-19 05:07:47,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:07:47,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:47,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:07:47,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:07:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-19 05:07:47,104 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-19 05:07:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:07:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:07:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:07:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:07:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2023-11-19 05:07:47,108 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2023-11-19 05:07:47,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:07:47,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:07:47,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:07:47,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:07:47,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:07:47,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:07:47,277 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:07:47,280 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:07:47,320 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-19 05:07:47,656 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:07:47,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:07:47,752 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-19 05:07:47,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:07:47 BoogieIcfgContainer [2023-11-19 05:07:47,773 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:07:47,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:07:47,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:07:47,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:07:47,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:07:46" (1/3) ... [2023-11-19 05:07:47,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e298f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:07:47, skipping insertion in model container [2023-11-19 05:07:47,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:07:46" (2/3) ... [2023-11-19 05:07:47,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e298f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:07:47, skipping insertion in model container [2023-11-19 05:07:47,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:07:47" (3/3) ... [2023-11-19 05:07:47,788 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2023-11-19 05:07:47,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:07:47,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:07:47,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:07:47,873 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;@40efeef4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:07:47,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:07:47,878 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) [2023-11-19 05:07:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:07:47,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:47,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:47,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-19 05:07:47,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash -126973127, now seen corresponding path program 1 times [2023-11-19 05:07:47,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:47,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006569960] [2023-11-19 05:07:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:07:48,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:48,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006569960] [2023-11-19 05:07:48,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006569960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:48,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:07:48,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:07:48,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423475651] [2023-11-19 05:07:48,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:48,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:07:48,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:07:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:07:48,369 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) [2023-11-19 05:07:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:48,447 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-11-19 05:07:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:07:48,449 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 [2023-11-19 05:07:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:48,456 INFO L225 Difference]: With dead ends: 48 [2023-11-19 05:07:48,456 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 05:07:48,458 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 [2023-11-19 05:07:48,462 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-11-19 05:07:48,463 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] [2023-11-19 05:07:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 05:07:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-11-19 05:07:48,500 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) [2023-11-19 05:07:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2023-11-19 05:07:48,505 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 14 [2023-11-19 05:07:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:48,506 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2023-11-19 05:07:48,506 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) [2023-11-19 05:07:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2023-11-19 05:07:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:07:48,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:48,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:07:48,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:07:48,512 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-19 05:07:48,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:48,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1824013939, now seen corresponding path program 1 times [2023-11-19 05:07:48,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:48,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832272737] [2023-11-19 05:07:48,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:48,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:07:48,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:48,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832272737] [2023-11-19 05:07:48,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832272737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:07:48,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852833156] [2023-11-19 05:07:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:48,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:48,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:48,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:07:48,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:07:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:49,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:07:49,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:07:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:07:49,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:07:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:07:49,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852833156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:07:49,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23849537] [2023-11-19 05:07:49,279 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-19 05:07:49,280 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:07:49,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:07:49,288 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:07:49,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:07:50,141 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-11-19 05:07:50,186 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:07:50,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [23849537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:07:50,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:07:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 3, 4] total 18 [2023-11-19 05:07:50,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912933577] [2023-11-19 05:07:50,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:07:50,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:07:50,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:07:50,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:07:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:07:50,559 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) [2023-11-19 05:07:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:07:50,853 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-11-19 05:07:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:07:50,854 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 [2023-11-19 05:07:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:07:50,859 INFO L225 Difference]: With dead ends: 51 [2023-11-19 05:07:50,859 INFO L226 Difference]: Without dead ends: 51 [2023-11-19 05:07:50,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:07:50,863 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 [2023-11-19 05:07:50,864 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] [2023-11-19 05:07:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-19 05:07:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2023-11-19 05:07:50,878 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) [2023-11-19 05:07:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2023-11-19 05:07:50,880 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 18 [2023-11-19 05:07:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:07:50,881 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2023-11-19 05:07:50,882 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) [2023-11-19 05:07:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2023-11-19 05:07:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 05:07:50,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:07:50,887 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] [2023-11-19 05:07:50,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:07:51,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:51,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-19 05:07:51,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:07:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash 169288711, now seen corresponding path program 1 times [2023-11-19 05:07:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:07:51,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568638119] [2023-11-19 05:07:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:51,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:07:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:07:51,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:07:51,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568638119] [2023-11-19 05:07:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568638119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:07:51,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166423403] [2023-11-19 05:07:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:07:51,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:07:51,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:07:51,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:07:51,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:07:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:07:51,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:07:51,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:07:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:07:51,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:07:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:07:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166423403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:07:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106570431] [2023-11-19 05:07:51,517 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-19 05:07:51,518 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:07:51,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:07:51,518 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:07:51,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:07:52,593 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-11-19 05:07:53,156 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:08:00,268 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 [2023-11-19 05:08:00,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:08:00,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:08:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-19 05:08:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863475552] [2023-11-19 05:08:00,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:08:00,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:08:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:08:00,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:08:00,272 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) [2023-11-19 05:08:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:00,401 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2023-11-19 05:08:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:08:00,402 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 [2023-11-19 05:08:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:00,403 INFO L225 Difference]: With dead ends: 66 [2023-11-19 05:08:00,403 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 05:08:00,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:08:00,407 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 [2023-11-19 05:08:00,409 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] [2023-11-19 05:08:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 05:08:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2023-11-19 05:08:00,425 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) [2023-11-19 05:08:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2023-11-19 05:08:00,430 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 21 [2023-11-19 05:08:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:00,430 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2023-11-19 05:08:00,431 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) [2023-11-19 05:08:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2023-11-19 05:08:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 05:08:00,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:00,435 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] [2023-11-19 05:08:00,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:08:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:00,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-19 05:08:00,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash 101326867, now seen corresponding path program 2 times [2023-11-19 05:08:00,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:00,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590672147] [2023-11-19 05:08:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:08:00,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590672147] [2023-11-19 05:08:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590672147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:08:00,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:08:00,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:08:00,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690761634] [2023-11-19 05:08:00,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:08:00,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:08:00,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:08:00,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:08:00,979 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) [2023-11-19 05:08:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:01,218 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2023-11-19 05:08:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:08:01,219 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 [2023-11-19 05:08:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:01,222 INFO L225 Difference]: With dead ends: 121 [2023-11-19 05:08:01,222 INFO L226 Difference]: Without dead ends: 121 [2023-11-19 05:08:01,223 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 [2023-11-19 05:08:01,223 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 [2023-11-19 05:08:01,224 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] [2023-11-19 05:08:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-19 05:08:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 71. [2023-11-19 05:08:01,234 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) [2023-11-19 05:08:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2023-11-19 05:08:01,236 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 29 [2023-11-19 05:08:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:01,236 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2023-11-19 05:08:01,236 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) [2023-11-19 05:08:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2023-11-19 05:08:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 05:08:01,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:01,238 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] [2023-11-19 05:08:01,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:08:01,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-19 05:08:01,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:01,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1516827512, now seen corresponding path program 1 times [2023-11-19 05:08:01,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:01,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033379740] [2023-11-19 05:08:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:08:01,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033379740] [2023-11-19 05:08:01,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033379740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:08:01,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824689256] [2023-11-19 05:08:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:01,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:01,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:08:01,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:08:01,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:08:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:01,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:08:01,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:08:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:08:01,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:08:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:08:01,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824689256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:08:01,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579108695] [2023-11-19 05:08:01,768 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-19 05:08:01,769 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:08:01,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:08:01,769 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:08:01,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:08:02,824 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 83 for LOIs [2023-11-19 05:08:04,811 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:08:05,560 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 0 |c_sll_append_sll_create_~len#1|)) (.cse1 (= |c_sll_append_sll_create_~head~0#1.offset| 0)) (.cse3 (= |c_sll_append_sll_create_~head~0#1.base| 0)) (.cse2 (= |c_sll_append_node_create_with_sublist_~new_node~0#1.offset| 0))) (and (or (and .cse0 .cse1 .cse2) (and .cse1 .cse3 .cse2)) (or (and .cse0 .cse1 (exists ((|v_#memory_int_104| (Array Int (Array Int Int)))) (= |c_#memory_int| (store |v_#memory_int_104| |c_sll_append_sll_create_~head~0#1.base| (store (select |v_#memory_int_104| |c_sll_append_sll_create_~head~0#1.base|) 0 (select (select |c_#memory_int| |c_sll_append_sll_create_~head~0#1.base|) 0))))) (not .cse3) .cse2 (exists ((|v_#memory_$Pointer$.base_90| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_90| |c_sll_append_sll_create_~head~0#1.base| (store (select |v_#memory_$Pointer$.base_90| |c_sll_append_sll_create_~head~0#1.base|) 0 (select (select |c_#memory_$Pointer$.base| |c_sll_append_sll_create_~head~0#1.base|) 0))) |c_#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.offset_90| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_90| |c_sll_append_sll_create_~head~0#1.base| (store (select |v_#memory_$Pointer$.offset_90| |c_sll_append_sll_create_~head~0#1.base|) 0 0)) |c_#memory_$Pointer$.offset|))) (and (= (select |c_old(#valid)| |c_sll_append_node_create_with_sublist_~new_node~0#1.base|) 0) (= |c_#memory_$Pointer$.base| |c_old(#memory_$Pointer$.base)|) .cse1 (= |c_#valid| (store |c_old(#valid)| |c_sll_append_node_create_with_sublist_~new_node~0#1.base| 1)) (= |c_sll_append_node_create_with_sublist_#in~sublist_length#1| |c_sll_append_~sublist_length#1|) (= |c_old(#memory_int)| |c_#memory_int|) (= |c_sll_append_sll_create_#in~len#1| |c_sll_append_sll_create_~len#1|) .cse3 (= |c_sll_append_node_create_with_sublist_~sublist_length#1| |c_sll_append_node_create_with_sublist_#in~sublist_length#1|) (not (= |c_sll_append_node_create_with_sublist_~new_node~0#1.base| 0)) (= (store |c_old(#length)| |c_sll_append_node_create_with_sublist_~new_node~0#1.base| 8) |c_#length|) (= |c_#memory_$Pointer$.offset| |c_old(#memory_$Pointer$.offset)|) .cse2 (= |c_sll_append_#in~sublist_length#1| |c_sll_append_~sublist_length#1|) (= |c_sll_append_node_create_with_sublist_~sublist_length#1| |c_sll_append_sll_create_#in~len#1|) (exists ((|v_ULTIMATE.start_main_~max~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (Array Int Int)) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_3| Int)) (let ((.cse5 (= |c_sll_append_#in~head#1.offset| 0)) (.cse6 (= |v_ULTIMATE.start_main_~max~0#1_BEFORE_CALL_9| 5)) (.cse7 (= |c_sll_append_#in~sublist_length#1| 3)) (.cse8 (<= 1 |c_#StackHeapBarrier|)) (.cse9 (<= 2 |c_sll_append_#in~head#1.base|))) (let ((.cse4 (and .cse5 .cse6 (<= 4 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9|) .cse7 .cse8 .cse9 (= |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_3| 0))) (.cse10 (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 3))) (and (or .cse4 (and .cse5 .cse6 .cse7 .cse8 .cse9 .cse10)) (<= (+ |v_ULTIMATE.start_main_~max~0#1_BEFORE_CALL_9| 1) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9|) (or .cse4 (let ((.cse11 (select |c_old(#memory_int)| 1))) (and .cse5 (exists ((|v_#length_46| (Array Int Int))) (and (= (select |v_#length_46| 2) 29) (= (select |v_#length_46| 1) 2) (= (store |v_#length_46| |c_sll_append_#in~head#1.base| 4) |c_old(#length)|))) (= (select (select |c_old(#memory_$Pointer$.offset)| |c_sll_append_#in~head#1.base|) 0) 0) .cse6 (<= (+ |c_#StackHeapBarrier| 1) |c_sll_append_#in~head#1.base|) (= (select (select |c_old(#memory_$Pointer$.base)| |c_sll_append_#in~head#1.base|) 0) 0) (not (= |c_sll_append_#in~head#1.base| 0)) (= 48 (select .cse11 0)) .cse7 .cse8 .cse10 (= (select .cse11 1) 0) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| |c_sll_append_#in~head#1.base|) 0) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| 1) 1) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| 2) 1) (= |c_old(#valid)| (store |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| |c_sll_append_#in~head#1.base| 1)) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| 0) 0)))))))) (= |c_sll_append_~head#1.offset| |c_sll_append_#in~head#1.offset|) (= |c_sll_append_~head#1.base| |c_sll_append_#in~head#1.base|) (<= (+ |c_sll_append_node_create_with_sublist_~new_node~0#1.base| 1) |c_#StackHeapBarrier|))))) is different from true [2023-11-19 05:08:07,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1579108695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:08:07,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:08:07,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 7, 7] total 27 [2023-11-19 05:08:07,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906561726] [2023-11-19 05:08:07,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:08:07,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:08:07,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:08:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=555, Unknown=1, NotChecked=48, Total=702 [2023-11-19 05:08:07,992 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) [2023-11-19 05:08:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:08:10,684 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2023-11-19 05:08:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 05:08:10,685 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 [2023-11-19 05:08:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:08:10,687 INFO L225 Difference]: With dead ends: 173 [2023-11-19 05:08:10,687 INFO L226 Difference]: Without dead ends: 173 [2023-11-19 05:08:10,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=120, Invalid=695, Unknown=1, NotChecked=54, Total=870 [2023-11-19 05:08:10,689 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:08:10,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 195 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 707 Invalid, 0 Unknown, 165 Unchecked, 2.1s Time] [2023-11-19 05:08:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-19 05:08:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2023-11-19 05:08:10,702 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) [2023-11-19 05:08:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2023-11-19 05:08:10,704 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 31 [2023-11-19 05:08:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:08:10,705 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2023-11-19 05:08:10,705 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) [2023-11-19 05:08:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2023-11-19 05:08:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 05:08:10,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:10,707 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] [2023-11-19 05:08:10,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 05:08:10,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:10,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-19 05:08:10,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:10,913 INFO L85 PathProgramCache]: Analyzing trace with hash -982321567, now seen corresponding path program 1 times [2023-11-19 05:08:10,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:10,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670215094] [2023-11-19 05:08:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:10,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:08:11,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:11,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670215094] [2023-11-19 05:08:11,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670215094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:08:11,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336129759] [2023-11-19 05:08:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:11,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:08:11,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:08:11,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:08:11,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5650ddad-25dc-4fd3-817e-0c39ab0760c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:08:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:11,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:08:11,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:08:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:08:11,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:08:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:08:11,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336129759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:08:11,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469670558] [2023-11-19 05:08:11,541 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-19 05:08:11,541 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:08:11,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:08:11,542 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:08:11,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:08:13,015 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-11-19 05:08:13,471 INFO L180 IcfgInterpreter]: Interpretation finished