./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/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 20fbdf1deafb883d59b25bfdcd58a0b89c69ce87 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/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 20fbdf1deafb883d59b25bfdcd58a0b89c69ce87 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 09:38:49,961 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 09:38:49,963 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 09:38:49,969 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 09:38:49,969 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 09:38:49,969 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 09:38:49,970 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 09:38:49,971 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 09:38:49,972 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 09:38:49,972 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 09:38:49,972 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 09:38:49,973 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 09:38:49,973 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 09:38:49,973 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 09:38:49,974 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 09:38:49,974 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 09:38:49,975 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 09:38:49,976 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 09:38:49,977 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 09:38:49,977 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 09:38:49,978 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 09:38:49,979 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 09:38:49,980 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 09:38:49,980 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 09:38:49,980 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 09:38:49,980 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 09:38:49,981 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 09:38:49,981 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 09:38:49,982 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 09:38:49,982 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 09:38:49,982 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 09:38:49,983 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 09:38:49,983 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 09:38:49,983 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 09:38:49,984 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 09:38:49,984 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 09:38:49,984 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 09:38:49,992 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 09:38:49,992 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 09:38:49,992 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 09:38:49,992 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 09:38:49,992 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 09:38:49,992 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 09:38:49,993 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 09:38:49,993 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 09:38:49,993 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 09:38:49,993 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 09:38:49,993 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 09:38:49,993 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 09:38:49,993 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 09:38:49,993 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 09:38:49,994 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 09:38:49,994 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 09:38:49,995 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 09:38:49,995 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 09:38:49,995 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/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 -> 20fbdf1deafb883d59b25bfdcd58a0b89c69ce87 [2018-12-09 09:38:50,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 09:38:50,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 09:38:50,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 09:38:50,025 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 09:38:50,026 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 09:38:50,026 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i [2018-12-09 09:38:50,071 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data/3cdf5ba33/2a2c2c47ca124f5abbbb4c6372df642e/FLAGd22c6a634 [2018-12-09 09:38:50,481 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 09:38:50,482 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i [2018-12-09 09:38:50,488 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data/3cdf5ba33/2a2c2c47ca124f5abbbb4c6372df642e/FLAGd22c6a634 [2018-12-09 09:38:50,497 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data/3cdf5ba33/2a2c2c47ca124f5abbbb4c6372df642e [2018-12-09 09:38:50,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 09:38:50,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 09:38:50,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 09:38:50,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 09:38:50,502 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 09:38:50,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@142c46d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50, skipping insertion in model container [2018-12-09 09:38:50,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 09:38:50,531 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 09:38:50,745 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:38:50,757 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 09:38:50,800 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:38:50,835 INFO L195 MainTranslator]: Completed translation [2018-12-09 09:38:50,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50 WrapperNode [2018-12-09 09:38:50,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 09:38:50,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 09:38:50,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 09:38:50,836 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 09:38:50,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 09:38:50,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 09:38:50,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 09:38:50,862 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 09:38:50,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... [2018-12-09 09:38:50,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 09:38:50,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 09:38:50,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 09:38:50,884 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 09:38:50,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/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 [2018-12-09 09:38:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 09:38:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_init [2018-12-09 09:38:50,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_init [2018-12-09 09:38:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2018-12-09 09:38:50,916 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2018-12-09 09:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-09 09:38:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-09 09:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 09:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_init [2018-12-09 09:38:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init [2018-12-09 09:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-12-09 09:38:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-12-09 09:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 09:38:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 09:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 09:38:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 09:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-09 09:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_init_internal [2018-12-09 09:38:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init_internal [2018-12-09 09:38:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_create [2018-12-09 09:38:50,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_create [2018-12-09 09:38:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-09 09:38:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-09 09:38:50,918 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-09 09:38:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 09:38:50,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 09:38:51,023 WARN L615 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-12-09 09:38:51,092 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 09:38:51,092 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 09:38:51,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:38:51 BoogieIcfgContainer [2018-12-09 09:38:51,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 09:38:51,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 09:38:51,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 09:38:51,094 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 09:38:51,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:38:50" (1/3) ... [2018-12-09 09:38:51,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736303b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:38:51, skipping insertion in model container [2018-12-09 09:38:51,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:38:50" (2/3) ... [2018-12-09 09:38:51,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736303b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:38:51, skipping insertion in model container [2018-12-09 09:38:51,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:38:51" (3/3) ... [2018-12-09 09:38:51,096 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test22_2_false-valid-memtrack_true-termination.i [2018-12-09 09:38:51,102 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 09:38:51,106 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-09 09:38:51,115 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-09 09:38:51,129 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 09:38:51,129 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 09:38:51,129 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 09:38:51,129 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 09:38:51,130 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 09:38:51,130 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 09:38:51,130 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 09:38:51,130 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 09:38:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-12-09 09:38:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 09:38:51,144 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:51,144 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:51,145 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:51,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1361157941, now seen corresponding path program 1 times [2018-12-09 09:38:51,150 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:51,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:51,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,181 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:51,270 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:51,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 09:38:51,271 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:51,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:38:51,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:38:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:38:51,283 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 5 states. [2018-12-09 09:38:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:51,371 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2018-12-09 09:38:51,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:38:51,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 09:38:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:51,381 INFO L225 Difference]: With dead ends: 74 [2018-12-09 09:38:51,381 INFO L226 Difference]: Without dead ends: 71 [2018-12-09 09:38:51,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:38:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-09 09:38:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2018-12-09 09:38:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-09 09:38:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2018-12-09 09:38:51,413 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 17 [2018-12-09 09:38:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:51,413 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2018-12-09 09:38:51,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:38:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2018-12-09 09:38:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 09:38:51,414 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:51,414 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:51,414 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:51,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:51,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1361157942, now seen corresponding path program 1 times [2018-12-09 09:38:51,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:51,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:51,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,416 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:51,469 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:51,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 09:38:51,469 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:51,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 09:38:51,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 09:38:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-09 09:38:51,470 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 6 states. [2018-12-09 09:38:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:51,533 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2018-12-09 09:38:51,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 09:38:51,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-09 09:38:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:51,535 INFO L225 Difference]: With dead ends: 70 [2018-12-09 09:38:51,535 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 09:38:51,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:38:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 09:38:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2018-12-09 09:38:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-09 09:38:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2018-12-09 09:38:51,539 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 17 [2018-12-09 09:38:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:51,539 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2018-12-09 09:38:51,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 09:38:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2018-12-09 09:38:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 09:38:51,540 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:51,540 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:51,540 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:51,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1389787092, now seen corresponding path program 1 times [2018-12-09 09:38:51,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:51,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:51,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,541 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:51,572 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:51,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 09:38:51,572 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:51,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:38:51,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:38:51,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:38:51,572 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 5 states. [2018-12-09 09:38:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:51,584 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2018-12-09 09:38:51,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:38:51,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 09:38:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:51,585 INFO L225 Difference]: With dead ends: 64 [2018-12-09 09:38:51,585 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 09:38:51,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:38:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 09:38:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-12-09 09:38:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 09:38:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2018-12-09 09:38:51,589 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 17 [2018-12-09 09:38:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:51,589 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2018-12-09 09:38:51,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:38:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2018-12-09 09:38:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 09:38:51,590 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:51,590 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:51,590 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:51,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:51,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1058628532, now seen corresponding path program 1 times [2018-12-09 09:38:51,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:51,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:51,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,592 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:51,615 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:51,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 09:38:51,616 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:51,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:38:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:38:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:38:51,616 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 5 states. [2018-12-09 09:38:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:51,625 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2018-12-09 09:38:51,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:38:51,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-09 09:38:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:51,626 INFO L225 Difference]: With dead ends: 64 [2018-12-09 09:38:51,626 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 09:38:51,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:38:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 09:38:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-12-09 09:38:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 09:38:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2018-12-09 09:38:51,629 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 22 [2018-12-09 09:38:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:51,629 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2018-12-09 09:38:51,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:38:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2018-12-09 09:38:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 09:38:51,630 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:51,630 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:51,630 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:51,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:51,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1439387405, now seen corresponding path program 1 times [2018-12-09 09:38:51,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:51,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:51,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,632 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:51,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:51,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 09:38:51,656 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:51,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 09:38:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 09:38:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:38:51,657 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 3 states. [2018-12-09 09:38:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:51,691 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-12-09 09:38:51,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 09:38:51,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-12-09 09:38:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:51,692 INFO L225 Difference]: With dead ends: 68 [2018-12-09 09:38:51,692 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 09:38:51,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:38:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 09:38:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-09 09:38:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 09:38:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-12-09 09:38:51,695 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 22 [2018-12-09 09:38:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:51,695 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-12-09 09:38:51,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 09:38:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-12-09 09:38:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-09 09:38:51,696 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:51,696 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:51,696 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:51,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1937675523, now seen corresponding path program 1 times [2018-12-09 09:38:51,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:51,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:51,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,698 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:51,766 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:51,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-12-09 09:38:51,766 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:51,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 09:38:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 09:38:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-12-09 09:38:51,767 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 11 states. [2018-12-09 09:38:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:51,920 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-12-09 09:38:51,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 09:38:51,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-12-09 09:38:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:51,921 INFO L225 Difference]: With dead ends: 57 [2018-12-09 09:38:51,921 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 09:38:51,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-12-09 09:38:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 09:38:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-09 09:38:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 09:38:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-12-09 09:38:51,924 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 32 [2018-12-09 09:38:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:51,924 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-12-09 09:38:51,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 09:38:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-12-09 09:38:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-09 09:38:51,925 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:51,925 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:51,925 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:51,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:51,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1937675522, now seen corresponding path program 1 times [2018-12-09 09:38:51,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:51,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:51,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:51,927 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:51,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:51,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-09 09:38:51,985 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:51,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 09:38:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 09:38:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-09 09:38:51,986 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 9 states. [2018-12-09 09:38:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:52,076 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-12-09 09:38:52,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 09:38:52,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-12-09 09:38:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:52,077 INFO L225 Difference]: With dead ends: 60 [2018-12-09 09:38:52,077 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 09:38:52,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-12-09 09:38:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 09:38:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-09 09:38:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 09:38:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-12-09 09:38:52,079 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 32 [2018-12-09 09:38:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:52,079 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-12-09 09:38:52,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 09:38:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-12-09 09:38:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-09 09:38:52,080 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:52,080 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:52,080 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:52,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1956552744, now seen corresponding path program 1 times [2018-12-09 09:38:52,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:52,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:52,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:52,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:52,082 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:52,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:52,165 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:52,165 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2018-12-09 09:38:52,167 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [7], [11], [15], [19], [20], [24], [26], [27], [39], [42], [44], [45], [50], [53], [54], [58], [62], [66], [70], [71], [72], [73], [74], [76], [78], [80], [81], [82], [84], [86] [2018-12-09 09:38:52,188 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 09:38:52,188 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 09:38:52,311 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 09:38:52,312 INFO L272 AbstractInterpreter]: Visited 33 different actions 41 times. Merged at 3 different actions 5 times. Never widened. Performed 352 root evaluator evaluations with a maximum evaluation depth of 4. Performed 352 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 25 variables. [2018-12-09 09:38:52,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:52,325 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 09:38:52,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:52,326 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:52,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:52,335 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:38:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:52,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:52,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:52,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:52,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2018-12-09 09:38:52,511 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:52,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 09:38:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 09:38:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2018-12-09 09:38:52,511 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 13 states. [2018-12-09 09:38:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:52,652 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-12-09 09:38:52,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 09:38:52,652 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2018-12-09 09:38:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:52,653 INFO L225 Difference]: With dead ends: 61 [2018-12-09 09:38:52,653 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 09:38:52,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-12-09 09:38:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 09:38:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-09 09:38:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 09:38:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-12-09 09:38:52,655 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 33 [2018-12-09 09:38:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:52,656 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-12-09 09:38:52,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 09:38:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-12-09 09:38:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 09:38:52,656 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:52,656 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:52,656 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:52,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:52,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1876422594, now seen corresponding path program 2 times [2018-12-09 09:38:52,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:52,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:52,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:52,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:52,658 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:52,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:52,728 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:52,728 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:38:52,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:38:52,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:52,729 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:52,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:38:52,735 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:38:52,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 09:38:52,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:38:52,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:52,780 INFO L478 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 [2018-12-09 09:38:52,781 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 09:38:52,785 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 09:38:52,786 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2018-12-09 09:38:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 09:38:52,951 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 09:38:53,161 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 09:38:53,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [11] total 32 [2018-12-09 09:38:53,161 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:53,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 09:38:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 09:38:53,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2018-12-09 09:38:53,162 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 13 states. [2018-12-09 09:38:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:53,359 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2018-12-09 09:38:53,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 09:38:53,359 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-12-09 09:38:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:53,360 INFO L225 Difference]: With dead ends: 58 [2018-12-09 09:38:53,360 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 09:38:53,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2018-12-09 09:38:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 09:38:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-09 09:38:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 09:38:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-12-09 09:38:53,363 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 34 [2018-12-09 09:38:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:53,363 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-12-09 09:38:53,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 09:38:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-12-09 09:38:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-09 09:38:53,363 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:53,363 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:53,364 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:53,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash -47845941, now seen corresponding path program 1 times [2018-12-09 09:38:53,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:53,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:53,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:38:53,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:53,365 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 09:38:53,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:53,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-12-09 09:38:53,418 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:53,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 09:38:53,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 09:38:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-12-09 09:38:53,419 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 11 states. [2018-12-09 09:38:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:53,539 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-12-09 09:38:53,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 09:38:53,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2018-12-09 09:38:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:53,540 INFO L225 Difference]: With dead ends: 56 [2018-12-09 09:38:53,540 INFO L226 Difference]: Without dead ends: 56 [2018-12-09 09:38:53,541 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-12-09 09:38:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-09 09:38:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-09 09:38:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 09:38:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-12-09 09:38:53,543 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 39 [2018-12-09 09:38:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:53,543 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-12-09 09:38:53,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 09:38:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-12-09 09:38:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-09 09:38:53,544 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:53,544 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:53,544 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:53,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:53,544 INFO L82 PathProgramCache]: Analyzing trace with hash -47845940, now seen corresponding path program 1 times [2018-12-09 09:38:53,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:53,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:53,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:53,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:53,546 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:53,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:53,630 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:53,630 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-12-09 09:38:53,630 INFO L205 CegarAbsIntRunner]: [0], [1], [4], [5], [7], [11], [15], [19], [20], [24], [26], [27], [31], [34], [39], [42], [44], [45], [50], [53], [54], [58], [62], [66], [70], [71], [72], [73], [74], [76], [78], [80], [81], [82], [84], [86], [87], [88] [2018-12-09 09:38:53,631 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 09:38:53,631 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 09:38:53,687 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 09:38:53,687 INFO L272 AbstractInterpreter]: Visited 38 different actions 50 times. Merged at 3 different actions 8 times. Widened at 1 different actions 1 times. Performed 422 root evaluator evaluations with a maximum evaluation depth of 4. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 3 fixpoints after 2 different actions. Largest state had 25 variables. [2018-12-09 09:38:53,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:53,689 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 09:38:53,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:53,689 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:53,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:53,695 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:38:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:53,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:53,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:53,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:53,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2018-12-09 09:38:53,837 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:53,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 09:38:53,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 09:38:53,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-12-09 09:38:53,838 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 15 states. [2018-12-09 09:38:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:53,976 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-12-09 09:38:53,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 09:38:53,977 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-12-09 09:38:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:53,977 INFO L225 Difference]: With dead ends: 59 [2018-12-09 09:38:53,977 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 09:38:53,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2018-12-09 09:38:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 09:38:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-09 09:38:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 09:38:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-12-09 09:38:53,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 39 [2018-12-09 09:38:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:53,981 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-12-09 09:38:53,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 09:38:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-12-09 09:38:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 09:38:53,981 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:53,981 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:53,982 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:53,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:53,982 INFO L82 PathProgramCache]: Analyzing trace with hash -744196766, now seen corresponding path program 2 times [2018-12-09 09:38:53,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:53,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:53,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:53,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:53,983 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:54,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:54,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:54,080 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:38:54,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:38:54,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:54,081 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:54,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:38:54,088 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:38:54,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 09:38:54,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:38:54,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:54,119 INFO L478 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 [2018-12-09 09:38:54,119 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 09:38:54,128 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 09:38:54,128 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2018-12-09 09:38:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 09:38:54,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 09:38:54,519 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 09:38:54,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [12] total 33 [2018-12-09 09:38:54,519 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:54,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 09:38:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 09:38:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2018-12-09 09:38:54,520 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 13 states. [2018-12-09 09:38:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:54,707 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-12-09 09:38:54,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 09:38:54,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-12-09 09:38:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:54,708 INFO L225 Difference]: With dead ends: 55 [2018-12-09 09:38:54,708 INFO L226 Difference]: Without dead ends: 55 [2018-12-09 09:38:54,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2018-12-09 09:38:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-09 09:38:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-09 09:38:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 09:38:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-12-09 09:38:54,711 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 40 [2018-12-09 09:38:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:54,711 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-12-09 09:38:54,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 09:38:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-12-09 09:38:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-09 09:38:54,712 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:54,712 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:54,712 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:54,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1067944240, now seen corresponding path program 1 times [2018-12-09 09:38:54,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:54,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:54,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:38:54,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:54,713 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 09:38:54,740 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:54,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 09:38:54,740 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:54,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 09:38:54,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 09:38:54,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:38:54,741 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 7 states. [2018-12-09 09:38:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:54,758 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-12-09 09:38:54,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 09:38:54,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2018-12-09 09:38:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:54,759 INFO L225 Difference]: With dead ends: 57 [2018-12-09 09:38:54,759 INFO L226 Difference]: Without dead ends: 55 [2018-12-09 09:38:54,759 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:38:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-09 09:38:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-09 09:38:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 09:38:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-12-09 09:38:54,761 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 38 [2018-12-09 09:38:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:54,762 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-12-09 09:38:54,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 09:38:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-12-09 09:38:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 09:38:54,763 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:54,763 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:54,763 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:54,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash -189517611, now seen corresponding path program 1 times [2018-12-09 09:38:54,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:54,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:54,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:54,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:54,764 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 09:38:54,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:38:54,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-09 09:38:54,813 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:38:54,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 09:38:54,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 09:38:54,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-09 09:38:54,814 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 9 states. [2018-12-09 09:38:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:54,846 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-12-09 09:38:54,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 09:38:54,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2018-12-09 09:38:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:54,847 INFO L225 Difference]: With dead ends: 59 [2018-12-09 09:38:54,847 INFO L226 Difference]: Without dead ends: 55 [2018-12-09 09:38:54,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-12-09 09:38:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-09 09:38:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-09 09:38:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 09:38:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-12-09 09:38:54,850 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 43 [2018-12-09 09:38:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:54,850 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-12-09 09:38:54,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 09:38:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-12-09 09:38:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-09 09:38:54,851 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:54,851 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:54,851 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:54,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1274775663, now seen corresponding path program 1 times [2018-12-09 09:38:54,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:54,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:54,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:54,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:54,853 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:54,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:54,946 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:54,946 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 55 with the following transitions: [2018-12-09 09:38:54,946 INFO L205 CegarAbsIntRunner]: [0], [1], [4], [5], [7], [11], [15], [17], [18], [19], [20], [24], [26], [27], [30], [31], [32], [35], [38], [39], [42], [44], [45], [50], [52], [53], [54], [58], [60], [61], [62], [66], [69], [70], [71], [72], [73], [74], [75], [76], [77], [78], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89] [2018-12-09 09:38:54,948 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 09:38:54,948 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 09:38:55,007 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 09:38:55,008 INFO L272 AbstractInterpreter]: Visited 52 different actions 64 times. Merged at 3 different actions 8 times. Widened at 1 different actions 1 times. Performed 459 root evaluator evaluations with a maximum evaluation depth of 4. Performed 459 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 3 fixpoints after 2 different actions. Largest state had 26 variables. [2018-12-09 09:38:55,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:55,010 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 09:38:55,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:55,011 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:55,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:55,020 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:38:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:55,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:55,107 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:55,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:55,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 22 [2018-12-09 09:38:55,261 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:55,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 09:38:55,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 09:38:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-12-09 09:38:55,262 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 17 states. [2018-12-09 09:38:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:55,390 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-12-09 09:38:55,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 09:38:55,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2018-12-09 09:38:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:55,391 INFO L225 Difference]: With dead ends: 58 [2018-12-09 09:38:55,391 INFO L226 Difference]: Without dead ends: 56 [2018-12-09 09:38:55,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2018-12-09 09:38:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-09 09:38:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-09 09:38:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 09:38:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-12-09 09:38:55,393 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-12-09 09:38:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:55,393 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-12-09 09:38:55,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 09:38:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-12-09 09:38:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-09 09:38:55,393 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:55,393 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:55,393 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:55,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash 20324889, now seen corresponding path program 2 times [2018-12-09 09:38:55,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:55,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:55,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:55,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:55,394 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:55,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:55,471 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:55,471 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:38:55,471 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:38:55,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:55,471 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:55,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:38:55,477 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:38:55,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 09:38:55,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:38:55,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:55,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:55,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:55,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 25 [2018-12-09 09:38:55,748 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:55,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-09 09:38:55,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-09 09:38:55,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-12-09 09:38:55,749 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-12-09 09:38:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:55,938 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-12-09 09:38:55,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 09:38:55,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-12-09 09:38:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:55,939 INFO L225 Difference]: With dead ends: 59 [2018-12-09 09:38:55,939 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 09:38:55,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2018-12-09 09:38:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 09:38:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-09 09:38:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 09:38:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-12-09 09:38:55,941 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-12-09 09:38:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:55,941 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-12-09 09:38:55,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-09 09:38:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-12-09 09:38:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 09:38:55,942 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:55,942 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:55,942 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:55,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash -212943441, now seen corresponding path program 3 times [2018-12-09 09:38:55,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:55,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:55,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:38:55,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:55,944 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:56,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:56,045 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:56,045 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:38:56,045 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:38:56,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:56,045 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:56,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 09:38:56,053 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 09:38:56,079 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 09:38:56,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:38:56,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:56,151 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:56,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:56,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2018-12-09 09:38:56,345 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:56,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-09 09:38:56,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-09 09:38:56,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2018-12-09 09:38:56,346 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 21 states. [2018-12-09 09:38:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:56,530 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-12-09 09:38:56,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 09:38:56,530 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-12-09 09:38:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:56,531 INFO L225 Difference]: With dead ends: 60 [2018-12-09 09:38:56,531 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 09:38:56,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2018-12-09 09:38:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 09:38:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-09 09:38:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 09:38:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-12-09 09:38:56,533 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-12-09 09:38:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:56,533 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-12-09 09:38:56,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-09 09:38:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-12-09 09:38:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 09:38:56,534 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:56,534 INFO L402 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:56,534 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:56,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1145672921, now seen corresponding path program 4 times [2018-12-09 09:38:56,534 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:56,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:56,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:38:56,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:56,535 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:56,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:56,624 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:56,625 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:38:56,625 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:38:56,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:56,625 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:56,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:56,632 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:38:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:56,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:56,729 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:56,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:56,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 31 [2018-12-09 09:38:56,964 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:56,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-09 09:38:56,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-09 09:38:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2018-12-09 09:38:56,965 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 23 states. [2018-12-09 09:38:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:57,164 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-12-09 09:38:57,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 09:38:57,164 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2018-12-09 09:38:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:57,164 INFO L225 Difference]: With dead ends: 61 [2018-12-09 09:38:57,164 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 09:38:57,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=1138, Unknown=0, NotChecked=0, Total=1482 [2018-12-09 09:38:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 09:38:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-09 09:38:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 09:38:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-12-09 09:38:57,167 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-12-09 09:38:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:57,167 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-12-09 09:38:57,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-09 09:38:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-12-09 09:38:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-09 09:38:57,167 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:57,167 INFO L402 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:57,167 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:57,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:57,168 INFO L82 PathProgramCache]: Analyzing trace with hash 313107183, now seen corresponding path program 5 times [2018-12-09 09:38:57,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:57,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:57,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:57,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:57,169 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:57,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:57,268 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:57,268 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:38:57,268 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:38:57,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:57,268 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:57,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:38:57,275 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:38:57,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-09 09:38:57,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:38:57,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:57,837 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:58,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:58,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 34 [2018-12-09 09:38:58,089 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:58,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-09 09:38:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-09 09:38:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2018-12-09 09:38:58,090 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 25 states. [2018-12-09 09:38:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:58,322 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-12-09 09:38:58,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 09:38:58,323 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2018-12-09 09:38:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:58,323 INFO L225 Difference]: With dead ends: 62 [2018-12-09 09:38:58,323 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 09:38:58,323 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2018-12-09 09:38:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 09:38:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-09 09:38:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-09 09:38:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-12-09 09:38:58,325 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-12-09 09:38:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:58,325 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-12-09 09:38:58,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-09 09:38:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-12-09 09:38:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-09 09:38:58,325 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:58,325 INFO L402 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:58,325 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:58,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:58,326 INFO L82 PathProgramCache]: Analyzing trace with hash 273373081, now seen corresponding path program 6 times [2018-12-09 09:38:58,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:58,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:58,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:38:58,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:58,326 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:58,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:58,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:58,455 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:38:58,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:38:58,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:58,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:58,464 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 09:38:58,464 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 09:38:58,492 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 09:38:58,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:38:58,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:58,600 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:58,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:58,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 37 [2018-12-09 09:38:58,882 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:58,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-09 09:38:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-09 09:38:58,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2018-12-09 09:38:58,883 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2018-12-09 09:38:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:38:59,162 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-12-09 09:38:59,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-09 09:38:59,163 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2018-12-09 09:38:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:38:59,163 INFO L225 Difference]: With dead ends: 63 [2018-12-09 09:38:59,163 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 09:38:59,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1640, Unknown=0, NotChecked=0, Total=2162 [2018-12-09 09:38:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 09:38:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-09 09:38:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 09:38:59,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-12-09 09:38:59,165 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-12-09 09:38:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:38:59,165 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-12-09 09:38:59,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-09 09:38:59,165 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-12-09 09:38:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-12-09 09:38:59,165 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:38:59,165 INFO L402 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:38:59,165 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:38:59,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:38:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash -958384081, now seen corresponding path program 7 times [2018-12-09 09:38:59,166 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:38:59,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:59,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:38:59,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:38:59,166 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:38:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:59,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:59,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:38:59,303 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:38:59,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:38:59,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:38:59,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:38:59,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:38:59,311 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:38:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:38:59,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:38:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:59,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:38:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:38:59,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:38:59,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 40 [2018-12-09 09:38:59,754 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:38:59,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-09 09:38:59,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-09 09:38:59,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2018-12-09 09:38:59,755 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 29 states. [2018-12-09 09:39:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:00,048 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-12-09 09:39:00,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 09:39:00,048 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2018-12-09 09:39:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:00,048 INFO L225 Difference]: With dead ends: 64 [2018-12-09 09:39:00,049 INFO L226 Difference]: Without dead ends: 62 [2018-12-09 09:39:00,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=617, Invalid=1933, Unknown=0, NotChecked=0, Total=2550 [2018-12-09 09:39:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-09 09:39:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-12-09 09:39:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 09:39:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-12-09 09:39:00,050 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-12-09 09:39:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:00,050 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-12-09 09:39:00,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-09 09:39:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-12-09 09:39:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-09 09:39:00,051 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:00,051 INFO L402 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:00,051 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:39:00,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:00,051 INFO L82 PathProgramCache]: Analyzing trace with hash -488150439, now seen corresponding path program 8 times [2018-12-09 09:39:00,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:39:00,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:00,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:00,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:00,052 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:39:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:00,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:00,199 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:39:00,199 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:39:00,199 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:39:00,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:00,199 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:00,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:39:00,206 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:39:01,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 09:39:01,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:39:01,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:01,748 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:02,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:39:02,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 43 [2018-12-09 09:39:02,076 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:39:02,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-09 09:39:02,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-09 09:39:02,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2018-12-09 09:39:02,077 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 31 states. [2018-12-09 09:39:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:02,409 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-12-09 09:39:02,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-09 09:39:02,409 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-12-09 09:39:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:02,409 INFO L225 Difference]: With dead ends: 65 [2018-12-09 09:39:02,409 INFO L226 Difference]: Without dead ends: 63 [2018-12-09 09:39:02,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=714, Invalid=2256, Unknown=0, NotChecked=0, Total=2970 [2018-12-09 09:39:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-09 09:39:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-12-09 09:39:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-09 09:39:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-12-09 09:39:02,411 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-12-09 09:39:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:02,411 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-12-09 09:39:02,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-09 09:39:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-12-09 09:39:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-09 09:39:02,412 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:02,412 INFO L402 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:02,412 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:39:02,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:02,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1204190575, now seen corresponding path program 9 times [2018-12-09 09:39:02,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:39:02,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:02,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:39:02,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:02,413 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:39:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:02,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:02,564 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:39:02,564 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:39:02,564 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:39:02,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:02,564 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:02,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 09:39:02,571 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 09:39:02,597 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 09:39:02,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:39:02,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:02,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:03,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:39:03,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 46 [2018-12-09 09:39:03,108 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:39:03,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-09 09:39:03,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-09 09:39:03,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1617, Unknown=0, NotChecked=0, Total=2070 [2018-12-09 09:39:03,108 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 33 states. [2018-12-09 09:39:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:03,458 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-12-09 09:39:03,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-09 09:39:03,458 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2018-12-09 09:39:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:03,459 INFO L225 Difference]: With dead ends: 66 [2018-12-09 09:39:03,459 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 09:39:03,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=813, Invalid=2609, Unknown=0, NotChecked=0, Total=3422 [2018-12-09 09:39:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 09:39:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-09 09:39:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 09:39:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-12-09 09:39:03,461 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-12-09 09:39:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:03,461 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-12-09 09:39:03,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-09 09:39:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-12-09 09:39:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-09 09:39:03,461 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:03,461 INFO L402 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:03,461 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:39:03,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:03,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2127154457, now seen corresponding path program 10 times [2018-12-09 09:39:03,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:39:03,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:03,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:39:03,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:03,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:39:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:03,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:03,649 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:39:03,649 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:39:03,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:39:03,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:03,649 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:03,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:03,657 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:39:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:03,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:03,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:04,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:39:04,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 49 [2018-12-09 09:39:04,280 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:39:04,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-09 09:39:04,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-09 09:39:04,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1845, Unknown=0, NotChecked=0, Total=2352 [2018-12-09 09:39:04,281 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 35 states. [2018-12-09 09:39:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:04,819 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-12-09 09:39:04,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-09 09:39:04,820 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 63 [2018-12-09 09:39:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:04,820 INFO L225 Difference]: With dead ends: 67 [2018-12-09 09:39:04,820 INFO L226 Difference]: Without dead ends: 65 [2018-12-09 09:39:04,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=914, Invalid=2992, Unknown=0, NotChecked=0, Total=3906 [2018-12-09 09:39:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-09 09:39:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-12-09 09:39:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-09 09:39:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-12-09 09:39:04,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-12-09 09:39:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:04,825 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-12-09 09:39:04,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-09 09:39:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-12-09 09:39:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-09 09:39:04,825 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:04,826 INFO L402 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:04,826 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:39:04,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:04,826 INFO L82 PathProgramCache]: Analyzing trace with hash 674263727, now seen corresponding path program 11 times [2018-12-09 09:39:04,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:39:04,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:04,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:04,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:04,827 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:39:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:04,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:04,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:39:04,990 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:39:04,990 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:39:04,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:04,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:04,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:39:04,997 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:39:07,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-12-09 09:39:07,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:39:07,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:07,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:07,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:39:07,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 52 [2018-12-09 09:39:07,800 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:39:07,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-09 09:39:07,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-09 09:39:07,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=2090, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 09:39:07,801 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 37 states. [2018-12-09 09:39:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:08,201 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-12-09 09:39:08,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-09 09:39:08,202 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 64 [2018-12-09 09:39:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:08,202 INFO L225 Difference]: With dead ends: 68 [2018-12-09 09:39:08,202 INFO L226 Difference]: Without dead ends: 66 [2018-12-09 09:39:08,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1017, Invalid=3405, Unknown=0, NotChecked=0, Total=4422 [2018-12-09 09:39:08,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-09 09:39:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-12-09 09:39:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-09 09:39:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-12-09 09:39:08,204 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-12-09 09:39:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:08,204 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-12-09 09:39:08,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-09 09:39:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-12-09 09:39:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-09 09:39:08,204 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:08,204 INFO L402 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:08,205 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:39:08,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:08,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1415675943, now seen corresponding path program 12 times [2018-12-09 09:39:08,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:39:08,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:08,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:39:08,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:08,205 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:39:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:08,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:08,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:39:08,390 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:39:08,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:39:08,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:08,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:08,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 09:39:08,397 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 09:39:08,423 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 09:39:08,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:39:08,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:08,624 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:09,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:39:09,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2018-12-09 09:39:09,116 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:39:09,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-09 09:39:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-09 09:39:09,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=2352, Unknown=0, NotChecked=0, Total=2970 [2018-12-09 09:39:09,117 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 39 states. [2018-12-09 09:39:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:09,558 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-12-09 09:39:09,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-09 09:39:09,558 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 65 [2018-12-09 09:39:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:09,559 INFO L225 Difference]: With dead ends: 69 [2018-12-09 09:39:09,559 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 09:39:09,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1122, Invalid=3848, Unknown=0, NotChecked=0, Total=4970 [2018-12-09 09:39:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 09:39:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-09 09:39:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-09 09:39:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-12-09 09:39:09,561 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-12-09 09:39:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:09,561 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-12-09 09:39:09,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-09 09:39:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-12-09 09:39:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-12-09 09:39:09,561 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:09,561 INFO L402 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:09,562 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:39:09,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:09,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1779296273, now seen corresponding path program 13 times [2018-12-09 09:39:09,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:39:09,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:09,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:39:09,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:09,562 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:39:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:09,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:09,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:39:09,753 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:39:09,753 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:39:09,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:09,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:09,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:09,759 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:39:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:09,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:10,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:10,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:39:10,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 57 [2018-12-09 09:39:10,527 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:39:10,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-09 09:39:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-09 09:39:10,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=2536, Unknown=0, NotChecked=0, Total=3192 [2018-12-09 09:39:10,528 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 41 states. [2018-12-09 09:39:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:11,534 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-12-09 09:39:11,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-09 09:39:11,534 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2018-12-09 09:39:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:11,535 INFO L225 Difference]: With dead ends: 70 [2018-12-09 09:39:11,535 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 09:39:11,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1209, Invalid=4193, Unknown=0, NotChecked=0, Total=5402 [2018-12-09 09:39:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 09:39:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-09 09:39:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-09 09:39:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-12-09 09:39:11,538 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-12-09 09:39:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:11,538 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-12-09 09:39:11,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-09 09:39:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-12-09 09:39:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-09 09:39:11,539 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:11,539 INFO L402 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:11,539 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION]=== [2018-12-09 09:39:11,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash -166624615, now seen corresponding path program 14 times [2018-12-09 09:39:11,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:39:11,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:11,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:11,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:39:11,540 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:39:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:39:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:39:11,587 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 09:39:11,595 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2018-12-09 09:39:11,597 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-09 09:39:11,604 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 17 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-09 09:39:11,604 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 18 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-09 09:39:11,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:39:11 BoogieIcfgContainer [2018-12-09 09:39:11,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 09:39:11,610 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 09:39:11,610 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 09:39:11,610 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 09:39:11,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:38:51" (3/4) ... [2018-12-09 09:39:11,613 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 09:39:11,613 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 09:39:11,613 INFO L168 Benchmark]: Toolchain (without parser) took 21114.34 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 466.6 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -188.5 MB). Peak memory consumption was 278.2 MB. Max. memory is 11.5 GB. [2018-12-09 09:39:11,614 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:39:11,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -174.7 MB). Peak memory consumption was 30.8 MB. Max. memory is 11.5 GB. [2018-12-09 09:39:11,614 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:39:11,615 INFO L168 Benchmark]: Boogie Preprocessor took 21.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:39:11,615 INFO L168 Benchmark]: RCFGBuilder took 208.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2018-12-09 09:39:11,615 INFO L168 Benchmark]: TraceAbstraction took 20517.21 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 315.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -41.5 MB). Peak memory consumption was 273.6 MB. Max. memory is 11.5 GB. [2018-12-09 09:39:11,615 INFO L168 Benchmark]: Witness Printer took 2.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:39:11,616 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 335.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -174.7 MB). Peak memory consumption was 30.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 208.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20517.21 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 315.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -41.5 MB). Peak memory consumption was 273.6 MB. Max. memory is 11.5 GB. * Witness Printer took 2.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 17 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 18 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1441]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1441. Possible FailurePath: [L1135] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [\old(ldv_global_msg_list)=null, \old(ldv_global_msg_list)=null, ldv_global_msg_list={1:0}] [L1442] CALL entry_point() VAL [ldv_global_msg_list={1:0}] [L1436] struct ldv_kobject *kobj; VAL [ldv_global_msg_list={1:0}] [L1437] CALL, EXPR ldv_kobject_create() VAL [ldv_global_msg_list={1:0}] [L1406] struct ldv_kobject *kobj; VAL [ldv_global_msg_list={1:0}] [L1408] CALL, EXPR ldv_malloc(sizeof(*kobj)) VAL [\old(size)=16, ldv_global_msg_list={1:0}] [L1073] COND TRUE __VERIFIER_nondet_int() [L1074] return malloc(size); VAL [\old(size)=16, \result={22:0}, ldv_global_msg_list={1:0}, malloc(size)={22:0}, size=16] [L1408] RET, EXPR ldv_malloc(sizeof(*kobj)) VAL [ldv_global_msg_list={1:0}, ldv_malloc(sizeof(*kobj))={22:0}] [L1408] kobj = ldv_malloc(sizeof(*kobj)) [L1409] COND FALSE !(!kobj) VAL [kobj={22:0}, ldv_global_msg_list={1:0}] [L1411] FCALL memset(kobj, 0, sizeof(*kobj)) VAL [kobj={22:0}, ldv_global_msg_list={1:0}, memset(kobj, 0, sizeof(*kobj))={22:0}] [L1413] CALL ldv_kobject_init(kobj) VAL [kobj={22:0}, ldv_global_msg_list={1:0}] [L1394] COND FALSE !(!kobj) VAL [kobj={22:0}, kobj={22:0}, ldv_global_msg_list={1:0}] [L1398] CALL ldv_kobject_init_internal(kobj) VAL [kobj={22:0}, ldv_global_msg_list={1:0}] [L1380] COND FALSE !(!kobj) VAL [kobj={22:0}, kobj={22:0}, ldv_global_msg_list={1:0}] [L1382] CALL ldv_kref_init(&kobj->kref) VAL [kref={22:12}, ldv_global_msg_list={1:0}] [L1294] ((&kref->refcount)->counter) = (1) VAL [kref={22:12}, kref={22:12}, ldv_global_msg_list={1:0}] [L1382] RET ldv_kref_init(&kobj->kref) VAL [kobj={22:0}, kobj={22:0}, ldv_global_msg_list={1:0}] [L1383] CALL LDV_INIT_LIST_HEAD(&kobj->entry) VAL [ldv_global_msg_list={1:0}, list={22:4}] [L1099] list->next = list VAL [ldv_global_msg_list={1:0}, list={22:4}, list={22:4}] [L1100] list->prev = list VAL [ldv_global_msg_list={1:0}, list={22:4}, list={22:4}] [L1383] RET LDV_INIT_LIST_HEAD(&kobj->entry) VAL [kobj={22:0}, kobj={22:0}, ldv_global_msg_list={1:0}] [L1398] RET ldv_kobject_init_internal(kobj) VAL [kobj={22:0}, kobj={22:0}, ldv_global_msg_list={1:0}] [L1413] RET ldv_kobject_init(kobj) VAL [kobj={22:0}, ldv_global_msg_list={1:0}] [L1414] return kobj; VAL [\result={22:0}, kobj={22:0}, ldv_global_msg_list={1:0}] [L1437] RET, EXPR ldv_kobject_create() VAL [ldv_global_msg_list={1:0}, ldv_kobject_create()={22:0}] [L1437] kobj = ldv_kobject_create() [L1442] RET entry_point() VAL [ldv_global_msg_list={1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 63 locations, 9 error locations. UNSAFE Result, 20.4s OverallTime, 28 OverallIterations, 16 TraceHistogramMax, 5.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1252 SDtfs, 422 SDslu, 13849 SDs, 0 SdLazy, 6156 SolverSat, 224 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2387 GetRequests, 1559 SyntacticMatches, 22 SemanticMatches, 806 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6045 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 27 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 2198 NumberOfCodeBlocks, 2193 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 2996 ConstructedInterpolants, 19 QuantifiedInterpolants, 419490 SizeOfPredicates, 35 NumberOfNonLiveVariables, 4682 ConjunctsInSsa, 249 ConjunctsInUnsatCore, 61 InterpolantComputations, 14 PerfectInterpolantSequences, 33/2082 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: 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 0.1.23-635dfa2 [2018-12-09 09:39:12,919 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 09:39:12,920 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 09:39:12,926 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 09:39:12,926 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 09:39:12,926 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 09:39:12,927 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 09:39:12,928 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 09:39:12,929 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 09:39:12,929 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 09:39:12,929 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 09:39:12,930 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 09:39:12,930 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 09:39:12,931 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 09:39:12,931 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 09:39:12,931 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 09:39:12,932 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 09:39:12,933 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 09:39:12,934 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 09:39:12,935 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 09:39:12,935 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 09:39:12,936 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 09:39:12,937 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 09:39:12,937 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 09:39:12,937 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 09:39:12,938 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 09:39:12,938 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 09:39:12,939 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 09:39:12,939 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 09:39:12,940 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 09:39:12,940 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 09:39:12,940 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 09:39:12,940 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 09:39:12,940 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 09:39:12,941 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 09:39:12,941 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 09:39:12,941 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-09 09:39:12,949 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 09:39:12,949 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 09:39:12,949 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 09:39:12,949 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 09:39:12,950 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 09:39:12,950 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 09:39:12,950 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 09:39:12,950 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 09:39:12,950 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 09:39:12,950 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 09:39:12,951 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 09:39:12,951 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 09:39:12,951 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 09:39:12,951 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 09:39:12,951 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 09:39:12,951 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 09:39:12,951 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 09:39:12,952 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 09:39:12,952 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 09:39:12,952 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 09:39:12,952 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 09:39:12,952 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 09:39:12,952 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-09 09:39:12,952 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-09 09:39:12,953 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 09:39:12,953 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 09:39:12,953 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 09:39:12,953 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 09:39:12,953 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 09:39:12,953 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 09:39:12,953 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 09:39:12,953 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 09:39:12,954 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 09:39:12,954 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-09 09:39:12,954 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 09:39:12,954 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-09 09:39:12,954 INFO L133 SettingsManager]: * Logic for external solver=AUFBV 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/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/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 -> 20fbdf1deafb883d59b25bfdcd58a0b89c69ce87 [2018-12-09 09:39:12,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 09:39:12,979 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 09:39:12,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 09:39:12,982 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 09:39:12,982 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 09:39:12,983 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i [2018-12-09 09:39:13,017 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data/5e12cba57/822e981ede0d417eac80f9a18a468efe/FLAG8d2acff05 [2018-12-09 09:39:13,410 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 09:39:13,411 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i [2018-12-09 09:39:13,419 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data/5e12cba57/822e981ede0d417eac80f9a18a468efe/FLAG8d2acff05 [2018-12-09 09:39:13,749 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/data/5e12cba57/822e981ede0d417eac80f9a18a468efe [2018-12-09 09:39:13,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 09:39:13,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 09:39:13,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 09:39:13,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 09:39:13,755 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 09:39:13,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:39:13" (1/1) ... [2018-12-09 09:39:13,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd2593e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:13, skipping insertion in model container [2018-12-09 09:39:13,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:39:13" (1/1) ... [2018-12-09 09:39:13,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 09:39:13,792 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 09:39:13,980 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:39:13,993 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 09:39:14,059 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:39:14,092 INFO L195 MainTranslator]: Completed translation [2018-12-09 09:39:14,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14 WrapperNode [2018-12-09 09:39:14,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 09:39:14,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 09:39:14,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 09:39:14,093 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 09:39:14,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 09:39:14,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 09:39:14,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 09:39:14,115 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 09:39:14,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... [2018-12-09 09:39:14,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 09:39:14,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 09:39:14,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 09:39:14,133 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 09:39:14,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/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 [2018-12-09 09:39:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 09:39:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_init [2018-12-09 09:39:14,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_init [2018-12-09 09:39:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2018-12-09 09:39:14,164 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-09 09:39:14,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_init [2018-12-09 09:39:14,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-12-09 09:39:14,165 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 09:39:14,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 09:39:14,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_init_internal [2018-12-09 09:39:14,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init_internal [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-09 09:39:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_create [2018-12-09 09:39:14,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_create [2018-12-09 09:39:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-09 09:39:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-09 09:39:14,166 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-09 09:39:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 09:39:14,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 09:39:14,288 WARN L615 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-12-09 09:39:14,363 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 09:39:14,363 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 09:39:14,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:39:14 BoogieIcfgContainer [2018-12-09 09:39:14,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 09:39:14,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 09:39:14,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 09:39:14,365 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 09:39:14,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:39:13" (1/3) ... [2018-12-09 09:39:14,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718581be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:39:14, skipping insertion in model container [2018-12-09 09:39:14,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:39:14" (2/3) ... [2018-12-09 09:39:14,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718581be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:39:14, skipping insertion in model container [2018-12-09 09:39:14,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:39:14" (3/3) ... [2018-12-09 09:39:14,367 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test22_2_false-valid-memtrack_true-termination.i [2018-12-09 09:39:14,372 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 09:39:14,377 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-09 09:39:14,385 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-09 09:39:14,399 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 09:39:14,400 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 09:39:14,400 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 09:39:14,400 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 09:39:14,400 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 09:39:14,400 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 09:39:14,400 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 09:39:14,400 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 09:39:14,400 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 09:39:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-12-09 09:39:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 09:39:14,413 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:14,413 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:14,414 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:14,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1361157941, now seen corresponding path program 1 times [2018-12-09 09:39:14,420 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:14,420 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:14,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:14,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:14,522 INFO L478 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 [2018-12-09 09:39:14,523 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 09:39:14,527 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 09:39:14,528 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-09 09:39:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:14,548 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:14,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:14,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 09:39:14,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:39:14,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:39:14,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:39:14,569 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 5 states. [2018-12-09 09:39:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:14,709 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2018-12-09 09:39:14,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:39:14,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 09:39:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:14,718 INFO L225 Difference]: With dead ends: 74 [2018-12-09 09:39:14,718 INFO L226 Difference]: Without dead ends: 71 [2018-12-09 09:39:14,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:39:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-09 09:39:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2018-12-09 09:39:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-09 09:39:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2018-12-09 09:39:14,745 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 17 [2018-12-09 09:39:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:14,745 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2018-12-09 09:39:14,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:39:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2018-12-09 09:39:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 09:39:14,746 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:14,746 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:14,746 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:14,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:14,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1361157942, now seen corresponding path program 1 times [2018-12-09 09:39:14,747 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:14,747 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:14,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:14,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:14,810 INFO L478 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 [2018-12-09 09:39:14,810 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 09:39:14,815 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 09:39:14,815 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-09 09:39:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:14,845 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:14,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:14,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 09:39:14,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 09:39:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 09:39:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-09 09:39:14,848 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 6 states. [2018-12-09 09:39:14,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:14,994 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2018-12-09 09:39:14,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 09:39:14,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-09 09:39:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:14,996 INFO L225 Difference]: With dead ends: 70 [2018-12-09 09:39:14,996 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 09:39:14,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:39:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 09:39:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2018-12-09 09:39:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-09 09:39:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2018-12-09 09:39:15,003 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 17 [2018-12-09 09:39:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:15,003 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2018-12-09 09:39:15,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 09:39:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2018-12-09 09:39:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 09:39:15,004 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:15,004 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:15,005 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:15,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:15,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1389787092, now seen corresponding path program 1 times [2018-12-09 09:39:15,005 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:15,005 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:15,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:15,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:15,075 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:15,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:15,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 09:39:15,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:39:15,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:39:15,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:39:15,078 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 5 states. [2018-12-09 09:39:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:15,093 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2018-12-09 09:39:15,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:39:15,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 09:39:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:15,094 INFO L225 Difference]: With dead ends: 64 [2018-12-09 09:39:15,094 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 09:39:15,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:39:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 09:39:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-12-09 09:39:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 09:39:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2018-12-09 09:39:15,097 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 17 [2018-12-09 09:39:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:15,098 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2018-12-09 09:39:15,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:39:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2018-12-09 09:39:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 09:39:15,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:15,098 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:15,098 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:15,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1058628532, now seen corresponding path program 1 times [2018-12-09 09:39:15,099 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:15,099 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:15,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:15,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:15,145 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:15,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:15,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 09:39:15,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:39:15,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:39:15,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:39:15,146 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 5 states. [2018-12-09 09:39:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:15,161 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2018-12-09 09:39:15,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:39:15,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-09 09:39:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:15,162 INFO L225 Difference]: With dead ends: 64 [2018-12-09 09:39:15,162 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 09:39:15,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:39:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 09:39:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-12-09 09:39:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 09:39:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2018-12-09 09:39:15,165 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 22 [2018-12-09 09:39:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:15,166 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2018-12-09 09:39:15,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:39:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2018-12-09 09:39:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 09:39:15,166 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:15,166 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:15,167 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:15,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:15,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1439387405, now seen corresponding path program 1 times [2018-12-09 09:39:15,167 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:15,167 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:15,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:15,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:15,209 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:15,210 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:15,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 09:39:15,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 09:39:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 09:39:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:39:15,211 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 3 states. [2018-12-09 09:39:15,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:15,277 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-12-09 09:39:15,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 09:39:15,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-12-09 09:39:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:15,279 INFO L225 Difference]: With dead ends: 68 [2018-12-09 09:39:15,279 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 09:39:15,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:39:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 09:39:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-09 09:39:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 09:39:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-12-09 09:39:15,283 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 22 [2018-12-09 09:39:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:15,283 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-12-09 09:39:15,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 09:39:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-12-09 09:39:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-09 09:39:15,284 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:15,284 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:15,285 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:15,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:15,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1937675523, now seen corresponding path program 1 times [2018-12-09 09:39:15,285 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:15,286 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:15,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:15,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:15,364 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:15,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:15,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 09:39:15,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 09:39:15,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 09:39:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 09:39:15,366 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 4 states. [2018-12-09 09:39:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:15,395 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-12-09 09:39:15,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 09:39:15,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2018-12-09 09:39:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:15,396 INFO L225 Difference]: With dead ends: 61 [2018-12-09 09:39:15,397 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 09:39:15,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 09:39:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 09:39:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-09 09:39:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 09:39:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-12-09 09:39:15,401 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 32 [2018-12-09 09:39:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:15,401 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-12-09 09:39:15,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 09:39:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-12-09 09:39:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-09 09:39:15,402 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:15,402 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:15,402 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:15,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:15,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1956552743, now seen corresponding path program 1 times [2018-12-09 09:39:15,403 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:15,403 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:15,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:15,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:15,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:15,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:15,547 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:15,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:15,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:15,577 INFO L478 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 [2018-12-09 09:39:15,578 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 09:39:15,580 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 09:39:15,581 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-09 09:39:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:39:15,732 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:15,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 09:39:15,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5] total 18 [2018-12-09 09:39:15,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 09:39:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 09:39:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2018-12-09 09:39:15,750 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 18 states. [2018-12-09 09:39:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:16,782 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-12-09 09:39:16,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 09:39:16,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-12-09 09:39:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:16,783 INFO L225 Difference]: With dead ends: 65 [2018-12-09 09:39:16,783 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 09:39:16,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2018-12-09 09:39:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 09:39:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-09 09:39:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 09:39:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-12-09 09:39:16,786 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 33 [2018-12-09 09:39:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:16,786 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-12-09 09:39:16,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 09:39:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-12-09 09:39:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 09:39:16,787 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:16,787 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:16,787 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:16,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1153066366, now seen corresponding path program 1 times [2018-12-09 09:39:16,787 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:16,788 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:16,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:16,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:16,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:17,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:17,034 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:17,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:17,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:17,086 INFO L478 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 [2018-12-09 09:39:17,086 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 09:39:17,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 09:39:17,090 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-09 09:39:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 09:39:17,352 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:17,367 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 09:39:17,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 8] total 25 [2018-12-09 09:39:17,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-09 09:39:17,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-09 09:39:17,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2018-12-09 09:39:17,369 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-12-09 09:39:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:19,756 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2018-12-09 09:39:19,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-09 09:39:19,756 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2018-12-09 09:39:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:19,757 INFO L225 Difference]: With dead ends: 70 [2018-12-09 09:39:19,757 INFO L226 Difference]: Without dead ends: 66 [2018-12-09 09:39:19,758 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2018-12-09 09:39:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-09 09:39:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-12-09 09:39:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-09 09:39:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-12-09 09:39:19,760 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 36 [2018-12-09 09:39:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:19,760 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-12-09 09:39:19,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-09 09:39:19,760 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-12-09 09:39:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-12-09 09:39:19,761 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:19,761 INFO L402 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:19,761 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:19,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:19,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1250977589, now seen corresponding path program 1 times [2018-12-09 09:39:19,762 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:19,762 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:19,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:19,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:19,932 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:39:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:39:20,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:39:20,407 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:39:20,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:20,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:20,469 INFO L478 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 [2018-12-09 09:39:20,469 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 09:39:20,471 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 09:39:20,471 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-09 09:39:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-09 09:39:20,979 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:20,995 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 09:39:20,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [14, 14] total 36 [2018-12-09 09:39:20,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-09 09:39:20,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-09 09:39:20,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2018-12-09 09:39:20,997 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 36 states. [2018-12-09 09:39:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:23,487 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-12-09 09:39:23,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-09 09:39:23,487 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2018-12-09 09:39:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:23,488 INFO L225 Difference]: With dead ends: 74 [2018-12-09 09:39:23,488 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 09:39:23,489 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=511, Invalid=2681, Unknown=0, NotChecked=0, Total=3192 [2018-12-09 09:39:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 09:39:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-12-09 09:39:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-12-09 09:39:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-12-09 09:39:23,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 47 [2018-12-09 09:39:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:23,492 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-12-09 09:39:23,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-09 09:39:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-12-09 09:39:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-09 09:39:23,492 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:23,492 INFO L402 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:23,493 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:23,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:23,493 INFO L82 PathProgramCache]: Analyzing trace with hash 403513612, now seen corresponding path program 1 times [2018-12-09 09:39:23,493 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:23,493 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:23,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:23,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:23,676 INFO L478 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 [2018-12-09 09:39:23,676 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 09:39:23,680 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 09:39:23,680 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-09 09:39:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-12-09 09:39:23,837 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:23,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:23,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 09:39:23,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 09:39:23,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 09:39:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-12-09 09:39:23,840 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 13 states. [2018-12-09 09:39:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:24,241 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-12-09 09:39:24,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 09:39:24,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-12-09 09:39:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:24,242 INFO L225 Difference]: With dead ends: 68 [2018-12-09 09:39:24,242 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 09:39:24,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-12-09 09:39:24,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 09:39:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-09 09:39:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-09 09:39:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-12-09 09:39:24,245 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 53 [2018-12-09 09:39:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:24,245 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-12-09 09:39:24,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 09:39:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-12-09 09:39:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-09 09:39:24,245 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:24,245 INFO L402 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:24,246 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:24,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:24,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2070676730, now seen corresponding path program 1 times [2018-12-09 09:39:24,246 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:24,246 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:24,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:24,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-12-09 09:39:24,335 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:24,337 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:24,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 09:39:24,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 09:39:24,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 09:39:24,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:39:24,337 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 7 states. [2018-12-09 09:39:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:24,365 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-12-09 09:39:24,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 09:39:24,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2018-12-09 09:39:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:24,365 INFO L225 Difference]: With dead ends: 70 [2018-12-09 09:39:24,365 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 09:39:24,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:39:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 09:39:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-09 09:39:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-09 09:39:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-12-09 09:39:24,367 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 51 [2018-12-09 09:39:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:24,368 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-12-09 09:39:24,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 09:39:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-12-09 09:39:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 09:39:24,368 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:24,368 INFO L402 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:24,368 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:24,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash -984290069, now seen corresponding path program 1 times [2018-12-09 09:39:24,369 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:24,369 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:24,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:39:24,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:39:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-12-09 09:39:24,484 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:39:24,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:39:24,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-09 09:39:24,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 09:39:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 09:39:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-09 09:39:24,486 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 9 states. [2018-12-09 09:39:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:39:24,539 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-12-09 09:39:24,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 09:39:24,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2018-12-09 09:39:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:39:24,540 INFO L225 Difference]: With dead ends: 72 [2018-12-09 09:39:24,540 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 09:39:24,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-12-09 09:39:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 09:39:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-09 09:39:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-09 09:39:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-12-09 09:39:24,543 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 56 [2018-12-09 09:39:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:39:24,543 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-12-09 09:39:24,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 09:39:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-12-09 09:39:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-09 09:39:24,544 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:39:24,544 INFO L402 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:39:24,544 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ldv_kref_initErr0REQUIRES_VIOLATION, ldv_kref_initErr1REQUIRES_VIOLATION, ldv_kobject_createErr0REQUIRES_VIOLATION, ldv_kobject_createErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATION, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATION]=== [2018-12-09 09:39:24,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:39:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash -166624615, now seen corresponding path program 1 times [2018-12-09 09:39:24,545 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:39:24,545 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf1630ad-98db-4bd5-ba4b-517682dfd4fe/bin-2019/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:39:24,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:39:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:39:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:39:30,778 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 09:39:30,787 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2018-12-09 09:39:30,789 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-09 09:39:30,796 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: BitvecLiteral 0bv32 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-09 09:39:30,796 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: BitvecLiteral 0bv32 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-09 09:39:30,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:39:30 BoogieIcfgContainer [2018-12-09 09:39:30,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 09:39:30,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 09:39:30,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 09:39:30,803 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 09:39:30,803 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:39:14" (3/4) ... [2018-12-09 09:39:30,805 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 09:39:30,805 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 09:39:30,806 INFO L168 Benchmark]: Toolchain (without parser) took 17054.72 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 299.4 MB). Free memory was 938.0 MB in the beginning and 878.9 MB in the end (delta: 59.1 MB). Peak memory consumption was 358.5 MB. Max. memory is 11.5 GB. [2018-12-09 09:39:30,807 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:39:30,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -157.6 MB). Peak memory consumption was 37.3 MB. Max. memory is 11.5 GB. [2018-12-09 09:39:30,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:39:30,807 INFO L168 Benchmark]: Boogie Preprocessor took 18.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:39:30,808 INFO L168 Benchmark]: RCFGBuilder took 230.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2018-12-09 09:39:30,808 INFO L168 Benchmark]: TraceAbstraction took 16438.82 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 165.2 MB). Free memory was 1.1 GB in the beginning and 878.9 MB in the end (delta: 192.5 MB). Peak memory consumption was 357.7 MB. Max. memory is 11.5 GB. [2018-12-09 09:39:30,808 INFO L168 Benchmark]: Witness Printer took 2.85 ms. Allocated memory is still 1.3 GB. Free memory is still 878.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:39:30,810 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 340.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -157.6 MB). Peak memory consumption was 37.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 230.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16438.82 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 165.2 MB). Free memory was 1.1 GB in the beginning and 878.9 MB in the end (delta: 192.5 MB). Peak memory consumption was 357.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.85 ms. Allocated memory is still 1.3 GB. Free memory is still 878.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: BitvecLiteral 0bv32 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: BitvecLiteral 0bv32 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1441]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1441. Possible FailurePath: [L1135] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [\old(ldv_global_msg_list)=null, \old(ldv_global_msg_list)=null, ldv_global_msg_list={-485990135:0}] [L1442] CALL entry_point() VAL [ldv_global_msg_list={-485990135:0}] [L1436] struct ldv_kobject *kobj; VAL [ldv_global_msg_list={-485990135:0}] [L1437] CALL, EXPR ldv_kobject_create() VAL [ldv_global_msg_list={-485990135:0}] [L1406] struct ldv_kobject *kobj; VAL [ldv_global_msg_list={-485990135:0}] [L1408] CALL, EXPR ldv_malloc(sizeof(*kobj)) VAL [\old(size)=16, ldv_global_msg_list={-485990135:0}] [L1073] COND TRUE __VERIFIER_nondet_int() [L1074] return malloc(size); VAL [\old(size)=16, \result={1:0}, ldv_global_msg_list={-485990135:0}, malloc(size)={1:0}, size=16] [L1408] RET, EXPR ldv_malloc(sizeof(*kobj)) VAL [ldv_global_msg_list={-485990135:0}, ldv_malloc(sizeof(*kobj))={1:0}] [L1408] kobj = ldv_malloc(sizeof(*kobj)) [L1409] COND FALSE !(!kobj) VAL [kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1411] FCALL memset(kobj, 0, sizeof(*kobj)) VAL [kobj={1:0}, ldv_global_msg_list={-485990135:0}, memset(kobj, 0, sizeof(*kobj))={1:0}] [L1413] CALL ldv_kobject_init(kobj) VAL [kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1394] COND FALSE !(!kobj) VAL [kobj={1:0}, kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1398] CALL ldv_kobject_init_internal(kobj) VAL [kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1380] COND FALSE !(!kobj) VAL [kobj={1:0}, kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1382] CALL ldv_kref_init(&kobj->kref) VAL [kref={1:12}, ldv_global_msg_list={-485990135:0}] [L1294] ((&kref->refcount)->counter) = (1) VAL [kref={1:12}, kref={1:12}, ldv_global_msg_list={-485990135:0}] [L1382] RET ldv_kref_init(&kobj->kref) VAL [kobj={1:0}, kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1383] CALL LDV_INIT_LIST_HEAD(&kobj->entry) VAL [ldv_global_msg_list={-485990135:0}, list={1:4}] [L1099] list->next = list VAL [ldv_global_msg_list={-485990135:0}, list={1:4}, list={1:4}] [L1100] list->prev = list VAL [ldv_global_msg_list={-485990135:0}, list={1:4}, list={1:4}] [L1383] RET LDV_INIT_LIST_HEAD(&kobj->entry) VAL [kobj={1:0}, kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1398] RET ldv_kobject_init_internal(kobj) VAL [kobj={1:0}, kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1413] RET ldv_kobject_init(kobj) VAL [kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1414] return kobj; VAL [\result={1:0}, kobj={1:0}, ldv_global_msg_list={-485990135:0}] [L1437] RET, EXPR ldv_kobject_create() VAL [ldv_global_msg_list={-485990135:0}, ldv_kobject_create()={1:0}] [L1437] kobj = ldv_kobject_create() [L1442] RET entry_point() VAL [ldv_global_msg_list={-485990135:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 63 locations, 9 error locations. UNSAFE Result, 16.4s OverallTime, 13 OverallIterations, 16 TraceHistogramMax, 6.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 583 SDtfs, 304 SDslu, 2696 SDs, 0 SdLazy, 2382 SolverSat, 146 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 675 GetRequests, 497 SyntacticMatches, 11 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 586 NumberOfCodeBlocks, 586 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 617 ConstructedInterpolants, 59 QuantifiedInterpolants, 70216 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2242 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 474/606 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...