./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/splice-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/splice-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cac090f4bce8d8ee66db31cac76f8c06713c6de9 ................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/splice-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cac090f4bce8d8ee66db31cac76f8c06713c6de9 .................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:38:51,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:51,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:51,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:51,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:51,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:51,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:51,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:51,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:51,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:51,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:51,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:51,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:51,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:51,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:51,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:51,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:51,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:51,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:51,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:51,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:51,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:51,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:51,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:51,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:51,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:51,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:51,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:51,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:51,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:51,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:51,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:51,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:51,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:52,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:52,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:52,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:52,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:52,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:52,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:52,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:52,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:38:52,068 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:52,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:52,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:52,070 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:52,071 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:52,071 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:52,071 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:38:52,072 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:52,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:52,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:38:52,074 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:38:52,074 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:52,074 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:38:52,075 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:38:52,075 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:38:52,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:38:52,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:38:52,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:52,077 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:52,077 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:38:52,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:38:52,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:52,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:52,078 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:38:52,079 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:38:52,079 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:38:52,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:52,080 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:52,080 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:52,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:52,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:52,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:52,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:52,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:52,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:52,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:52,083 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:38:52,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:38:52,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:52,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:52,084 INFO L138 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-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cac090f4bce8d8ee66db31cac76f8c06713c6de9 [2020-11-28 07:38:52,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:38:52,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:38:52,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:38:52,485 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:38:52,491 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:38:52,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/../../sv-benchmarks/c/list-properties/splice-2.i [2020-11-28 07:38:52,593 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data/355f8b7cb/ad817a591c95416d9aa14148609efcf0/FLAG65c4b0d8e [2020-11-28 07:38:53,256 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:53,258 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/sv-benchmarks/c/list-properties/splice-2.i [2020-11-28 07:38:53,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data/355f8b7cb/ad817a591c95416d9aa14148609efcf0/FLAG65c4b0d8e [2020-11-28 07:38:53,506 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data/355f8b7cb/ad817a591c95416d9aa14148609efcf0 [2020-11-28 07:38:53,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:53,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:53,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:53,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:53,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:53,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:53" (1/1) ... [2020-11-28 07:38:53,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f79d55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:53, skipping insertion in model container [2020-11-28 07:38:53,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:53" (1/1) ... [2020-11-28 07:38:53,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:53,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:54,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:54,018 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:54,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:54,131 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:54,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54 WrapperNode [2020-11-28 07:38:54,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:54,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:54,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:54,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:54,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:54,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:54,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:54,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:54,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... [2020-11-28 07:38:54,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:54,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:54,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:54,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:54,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:38:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:38:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:38:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 07:38:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 07:38:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:38:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:54,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:55,344 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:55,344 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-28 07:38:55,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:55 BoogieIcfgContainer [2020-11-28 07:38:55,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:55,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:55,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:55,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:55,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:53" (1/3) ... [2020-11-28 07:38:55,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e9ebae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:55, skipping insertion in model container [2020-11-28 07:38:55,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:54" (2/3) ... [2020-11-28 07:38:55,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e9ebae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:55, skipping insertion in model container [2020-11-28 07:38:55,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:55" (3/3) ... [2020-11-28 07:38:55,358 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-2.i [2020-11-28 07:38:55,379 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:55,385 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2020-11-28 07:38:55,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2020-11-28 07:38:55,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:55,436 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:38:55,436 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:55,436 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:55,436 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:55,436 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:55,437 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:55,437 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-11-28 07:38:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:38:55,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:55,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:38:55,466 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:38:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:55,473 INFO L82 PathProgramCache]: Analyzing trace with hash 6037676, now seen corresponding path program 1 times [2020-11-28 07:38:55,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:55,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266222552] [2020-11-28 07:38:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:55,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266222552] [2020-11-28 07:38:55,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:55,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:38:55,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253557892] [2020-11-28 07:38:55,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:38:55,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:55,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:38:55,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:38:55,724 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 2 states. [2020-11-28 07:38:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:55,747 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-11-28 07:38:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:38:55,750 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-28 07:38:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:55,763 INFO L225 Difference]: With dead ends: 66 [2020-11-28 07:38:55,764 INFO L226 Difference]: Without dead ends: 63 [2020-11-28 07:38:55,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:38:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-28 07:38:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-28 07:38:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 07:38:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-11-28 07:38:55,822 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 4 [2020-11-28 07:38:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:55,822 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-11-28 07:38:55,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:38:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-11-28 07:38:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:38:55,824 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:55,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:38:55,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:38:55,825 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:38:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:55,829 INFO L82 PathProgramCache]: Analyzing trace with hash 187132298, now seen corresponding path program 1 times [2020-11-28 07:38:55,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:55,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980442636] [2020-11-28 07:38:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:55,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980442636] [2020-11-28 07:38:55,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:55,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:38:55,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324748686] [2020-11-28 07:38:55,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:55,963 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2020-11-28 07:38:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:56,299 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-11-28 07:38:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:56,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-28 07:38:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:56,303 INFO L225 Difference]: With dead ends: 70 [2020-11-28 07:38:56,303 INFO L226 Difference]: Without dead ends: 70 [2020-11-28 07:38:56,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-28 07:38:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-11-28 07:38:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-28 07:38:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-11-28 07:38:56,314 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 5 [2020-11-28 07:38:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:56,314 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-11-28 07:38:56,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-11-28 07:38:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:38:56,315 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:56,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:38:56,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:38:56,316 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:38:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash 187132299, now seen corresponding path program 1 times [2020-11-28 07:38:56,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:56,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982904305] [2020-11-28 07:38:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:56,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982904305] [2020-11-28 07:38:56,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:56,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:38:56,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968863702] [2020-11-28 07:38:56,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:56,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:56,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:56,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:56,449 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 4 states. [2020-11-28 07:38:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:56,762 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-11-28 07:38:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:56,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-28 07:38:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:56,766 INFO L225 Difference]: With dead ends: 74 [2020-11-28 07:38:56,766 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 07:38:56,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 07:38:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-11-28 07:38:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-28 07:38:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-11-28 07:38:56,775 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 5 [2020-11-28 07:38:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:56,775 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-11-28 07:38:56,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:56,776 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-11-28 07:38:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:38:56,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:56,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:56,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:38:56,777 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:38:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:56,778 INFO L82 PathProgramCache]: Analyzing trace with hash -9234414, now seen corresponding path program 1 times [2020-11-28 07:38:56,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:56,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819874755] [2020-11-28 07:38:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:56,805 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:56,835 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:56,870 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:38:56,871 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:56,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:38:56,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:56 BoogieIcfgContainer [2020-11-28 07:38:56,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:56,899 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:56,899 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:56,899 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:56,900 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:55" (3/4) ... [2020-11-28 07:38:56,904 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:38:56,904 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:56,907 INFO L168 Benchmark]: Toolchain (without parser) took 3391.80 ms. Allocated memory was 77.6 MB in the beginning and 121.6 MB in the end (delta: 44.0 MB). Free memory was 45.0 MB in the beginning and 85.1 MB in the end (delta: -40.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:56,908 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 77.6 MB. Free memory was 47.9 MB in the beginning and 47.8 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:56,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.26 ms. Allocated memory was 77.6 MB in the beginning and 100.7 MB in the end (delta: 23.1 MB). Free memory was 44.8 MB in the beginning and 65.4 MB in the end (delta: -20.6 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:56,910 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.64 ms. Allocated memory is still 100.7 MB. Free memory was 65.4 MB in the beginning and 63.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:56,911 INFO L168 Benchmark]: Boogie Preprocessor took 38.23 ms. Allocated memory is still 100.7 MB. Free memory was 63.3 MB in the beginning and 61.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:56,912 INFO L168 Benchmark]: RCFGBuilder took 1120.38 ms. Allocated memory is still 100.7 MB. Free memory was 61.9 MB in the beginning and 49.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:56,913 INFO L168 Benchmark]: TraceAbstraction took 1549.26 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 49.4 MB in the beginning and 85.1 MB in the end (delta: -35.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:56,914 INFO L168 Benchmark]: Witness Printer took 5.60 ms. Allocated memory is still 121.6 MB. Free memory is still 85.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:56,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 77.6 MB. Free memory was 47.9 MB in the beginning and 47.8 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 614.26 ms. Allocated memory was 77.6 MB in the beginning and 100.7 MB in the end (delta: 23.1 MB). Free memory was 44.8 MB in the beginning and 65.4 MB in the end (delta: -20.6 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.64 ms. Allocated memory is still 100.7 MB. Free memory was 65.4 MB in the beginning and 63.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.23 ms. Allocated memory is still 100.7 MB. Free memory was 63.3 MB in the beginning and 61.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1120.38 ms. Allocated memory is still 100.7 MB. Free memory was 61.9 MB in the beginning and 49.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1549.26 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 49.4 MB in the beginning and 85.1 MB in the end (delta: -35.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.60 ms. Allocated memory is still 121.6 MB. Free memory is still 85.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List l1; [L537] List l2; [L538] List b; [L539] List u; [L540] List p = a; [L541] COND FALSE !(__VERIFIER_nondet_int()) [L554] p->h = 3 [L555] EXPR a->h [L555] COND TRUE a->h == 3 [L555] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 67 locations, 30 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 194 SDslu, 29 SDs, 0 SdLazy, 136 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 233 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:38:59,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:59,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:59,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:59,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:59,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:59,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:59,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:59,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:59,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:59,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:59,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:59,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:59,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:59,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:59,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:59,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:59,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:59,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:59,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:59,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:59,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:59,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:59,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:59,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:59,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:59,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:59,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:59,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:59,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:59,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:59,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:59,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:59,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:59,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:59,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:59,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:59,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:59,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:59,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:59,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:59,910 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-11-28 07:38:59,961 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:59,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:59,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:59,964 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:59,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:59,964 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:59,965 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:59,965 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:59,965 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:59,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:38:59,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:38:59,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:59,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:59,968 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:38:59,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:38:59,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:59,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:59,969 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:38:59,969 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:38:59,970 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:38:59,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:59,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:59,970 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:38:59,971 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:38:59,971 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:59,971 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:59,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:59,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:38:59,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:59,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:59,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:59,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:59,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:59,973 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:38:59,973 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:38:59,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:59,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:59,974 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cac090f4bce8d8ee66db31cac76f8c06713c6de9 [2020-11-28 07:39:00,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:39:00,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:39:00,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:39:00,446 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:39:00,450 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:39:00,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/../../sv-benchmarks/c/list-properties/splice-2.i [2020-11-28 07:39:00,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data/5c55b2a22/70b4c0b8add948f1943035716f6bd33a/FLAG6fde70a92 [2020-11-28 07:39:01,241 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:39:01,241 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/sv-benchmarks/c/list-properties/splice-2.i [2020-11-28 07:39:01,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data/5c55b2a22/70b4c0b8add948f1943035716f6bd33a/FLAG6fde70a92 [2020-11-28 07:39:01,484 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/data/5c55b2a22/70b4c0b8add948f1943035716f6bd33a [2020-11-28 07:39:01,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:39:01,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:39:01,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:01,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:39:01,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:39:01,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:01" (1/1) ... [2020-11-28 07:39:01,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffe228d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:01, skipping insertion in model container [2020-11-28 07:39:01,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:01" (1/1) ... [2020-11-28 07:39:01,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:39:01,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:39:01,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:01,954 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:39:02,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:02,155 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:39:02,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02 WrapperNode [2020-11-28 07:39:02,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:02,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:02,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:39:02,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:39:02,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:02,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:39:02,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:39:02,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:39:02,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... [2020-11-28 07:39:02,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:39:02,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:39:02,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:39:02,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:39:02,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:39:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-28 07:39:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:39:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 07:39:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:39:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 07:39:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-28 07:39:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:39:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:39:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:39:03,229 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:39:03,231 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-28 07:39:03,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:03 BoogieIcfgContainer [2020-11-28 07:39:03,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:39:03,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:39:03,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:39:03,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:39:03,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:39:01" (1/3) ... [2020-11-28 07:39:03,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285e14ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:03, skipping insertion in model container [2020-11-28 07:39:03,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:02" (2/3) ... [2020-11-28 07:39:03,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285e14ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:03, skipping insertion in model container [2020-11-28 07:39:03,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:03" (3/3) ... [2020-11-28 07:39:03,248 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-2.i [2020-11-28 07:39:03,261 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:39:03,266 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2020-11-28 07:39:03,280 INFO L253 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2020-11-28 07:39:03,318 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:39:03,318 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:39:03,319 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:39:03,319 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:39:03,319 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:39:03,319 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:39:03,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:39:03,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:39:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2020-11-28 07:39:03,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:39:03,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:03,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:39:03,355 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:39:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:03,363 INFO L82 PathProgramCache]: Analyzing trace with hash 889599241, now seen corresponding path program 1 times [2020-11-28 07:39:03,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:39:03,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343028863] [2020-11-28 07:39:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-28 07:39:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:03,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:39:03,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:39:03,614 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 07:39:03,616 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:39:03,625 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:39:03,626 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:39:03,626 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-28 07:39:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:03,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:39:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:03,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343028863] [2020-11-28 07:39:03,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:03,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:39:03,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811690810] [2020-11-28 07:39:03,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:03,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:39:03,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:03,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:03,716 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 4 states. [2020-11-28 07:39:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:04,439 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-11-28 07:39:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:04,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:39:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:04,458 INFO L225 Difference]: With dead ends: 86 [2020-11-28 07:39:04,458 INFO L226 Difference]: Without dead ends: 80 [2020-11-28 07:39:04,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:39:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-28 07:39:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-11-28 07:39:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-28 07:39:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-11-28 07:39:04,511 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 6 [2020-11-28 07:39:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:04,512 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-11-28 07:39:04,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-11-28 07:39:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:39:04,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:04,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:39:04,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:39:04,730 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:39:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:04,732 INFO L82 PathProgramCache]: Analyzing trace with hash 889599242, now seen corresponding path program 1 times [2020-11-28 07:39:04,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:39:04,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363455337] [2020-11-28 07:39:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-28 07:39:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:39:04,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:39:04,854 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 07:39:04,854 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:39:04,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:39:04,868 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:39:04,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-28 07:39:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:04,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:39:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:05,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363455337] [2020-11-28 07:39:05,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:05,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-28 07:39:05,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826416327] [2020-11-28 07:39:05,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:39:05,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:39:05,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:39:05,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:39:05,042 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 6 states. [2020-11-28 07:39:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:05,909 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-11-28 07:39:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:39:05,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-28 07:39:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:05,913 INFO L225 Difference]: With dead ends: 90 [2020-11-28 07:39:05,913 INFO L226 Difference]: Without dead ends: 90 [2020-11-28 07:39:05,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:39:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-28 07:39:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2020-11-28 07:39:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-28 07:39:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-11-28 07:39:05,928 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 6 [2020-11-28 07:39:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:05,928 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-11-28 07:39:05,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:39:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-11-28 07:39:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:39:05,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:05,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:06,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:39:06,150 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:39:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:06,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2102797394, now seen corresponding path program 1 times [2020-11-28 07:39:06,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:39:06,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852615028] [2020-11-28 07:39:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_67ec5ba5-1295-4ff1-abf6-8cf8d6a2d7a1/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-28 07:39:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:39:06,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:39:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:39:06,312 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:39:06,371 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-28 07:39:06,371 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:39:06,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-28 07:39:06,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:39:06 BoogieIcfgContainer [2020-11-28 07:39:06,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:39:06,620 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:39:06,621 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:39:06,621 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:39:06,621 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:03" (3/4) ... [2020-11-28 07:39:06,625 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:39:06,625 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:39:06,631 INFO L168 Benchmark]: Toolchain (without parser) took 5133.85 ms. Allocated memory was 73.4 MB in the beginning and 94.4 MB in the end (delta: 21.0 MB). Free memory was 38.4 MB in the beginning and 51.1 MB in the end (delta: -12.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:06,631 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 73.4 MB. Free memory is still 56.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:06,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.69 ms. Allocated memory is still 73.4 MB. Free memory was 38.1 MB in the beginning and 44.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:06,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.00 ms. Allocated memory is still 73.4 MB. Free memory was 44.9 MB in the beginning and 42.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:06,635 INFO L168 Benchmark]: Boogie Preprocessor took 39.98 ms. Allocated memory is still 73.4 MB. Free memory was 42.8 MB in the beginning and 41.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:06,638 INFO L168 Benchmark]: RCFGBuilder took 942.79 ms. Allocated memory is still 73.4 MB. Free memory was 41.0 MB in the beginning and 34.9 MB in the end (delta: 6.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:06,645 INFO L168 Benchmark]: TraceAbstraction took 3384.41 ms. Allocated memory was 73.4 MB in the beginning and 94.4 MB in the end (delta: 21.0 MB). Free memory was 34.5 MB in the beginning and 51.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:06,646 INFO L168 Benchmark]: Witness Printer took 5.13 ms. Allocated memory is still 94.4 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:06,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 73.4 MB. Free memory is still 56.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 661.69 ms. Allocated memory is still 73.4 MB. Free memory was 38.1 MB in the beginning and 44.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 91.00 ms. Allocated memory is still 73.4 MB. Free memory was 44.9 MB in the beginning and 42.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.98 ms. Allocated memory is still 73.4 MB. Free memory was 42.8 MB in the beginning and 41.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 942.79 ms. Allocated memory is still 73.4 MB. Free memory was 41.0 MB in the beginning and 34.9 MB in the end (delta: 6.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3384.41 ms. Allocated memory was 73.4 MB in the beginning and 94.4 MB in the end (delta: 21.0 MB). Free memory was 34.5 MB in the beginning and 51.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.13 ms. Allocated memory is still 94.4 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List l1; [L537] List l2; [L538] List b; [L539] List u; [L540] List p = a; [L541] COND FALSE !(__VERIFIER_nondet_int()) [L554] p->h = 3 [L555] EXPR a->h [L555] COND TRUE a->h == 3 [L555] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 79 locations, 30 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 352 SDslu, 51 SDs, 0 SdLazy, 188 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 700 SizeOfPredicates, 8 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...