./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_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_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 1e7b1c8d88255aaa07a4a2fabadf999511fb9c76 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 1e7b1c8d88255aaa07a4a2fabadf999511fb9c76 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 14:27:43,441 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 14:27:43,442 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 14:27:43,448 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 14:27:43,448 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 14:27:43,448 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 14:27:43,449 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 14:27:43,450 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 14:27:43,451 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 14:27:43,451 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 14:27:43,452 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 14:27:43,452 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 14:27:43,453 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 14:27:43,453 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 14:27:43,454 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 14:27:43,454 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 14:27:43,454 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 14:27:43,455 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 14:27:43,456 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 14:27:43,457 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 14:27:43,458 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 14:27:43,458 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 14:27:43,459 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 14:27:43,460 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 14:27:43,460 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 14:27:43,460 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 14:27:43,461 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 14:27:43,461 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 14:27:43,462 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 14:27:43,462 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 14:27:43,462 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 14:27:43,463 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 14:27:43,463 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 14:27:43,463 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 14:27:43,464 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 14:27:43,464 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 14:27:43,464 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-02 14:27:43,472 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 14:27:43,472 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 14:27:43,473 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 14:27:43,473 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 14:27:43,473 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 14:27:43,474 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 14:27:43,474 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 14:27:43,474 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 14:27:43,474 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 14:27:43,474 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 14:27:43,474 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 14:27:43,474 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 14:27:43,475 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 14:27:43,475 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 14:27:43,475 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 14:27:43,475 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 14:27:43,475 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 14:27:43,476 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 14:27:43,476 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 14:27:43,476 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 14:27:43,476 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 14:27:43,476 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 14:27:43,476 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 14:27:43,476 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 14:27:43,477 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 14:27:43,477 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 14:27:43,477 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 14:27:43,477 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 14:27:43,477 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 14:27:43,477 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 14:27:43,477 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 14:27:43,478 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 14:27:43,478 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 14:27:43,478 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 14:27:43,478 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 14:27:43,478 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 14:27:43,478 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_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 -> 1e7b1c8d88255aaa07a4a2fabadf999511fb9c76 [2018-12-02 14:27:43,495 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 14:27:43,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 14:27:43,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 14:27:43,505 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 14:27:43,505 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 14:27:43,506 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-02 14:27:43,541 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data/0cf66dcb2/097365640ff648df923c3cb248c7e5c5/FLAG73d8c409d [2018-12-02 14:27:43,958 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 14:27:43,958 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-02 14:27:43,966 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data/0cf66dcb2/097365640ff648df923c3cb248c7e5c5/FLAG73d8c409d [2018-12-02 14:27:43,973 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data/0cf66dcb2/097365640ff648df923c3cb248c7e5c5 [2018-12-02 14:27:43,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 14:27:43,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 14:27:43,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 14:27:43,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 14:27:43,978 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 14:27:43,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:27:43" (1/1) ... [2018-12-02 14:27:43,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38aff2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:43, skipping insertion in model container [2018-12-02 14:27:43,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:27:43" (1/1) ... [2018-12-02 14:27:43,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 14:27:44,007 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 14:27:44,225 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 14:27:44,234 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 14:27:44,277 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 14:27:44,313 INFO L195 MainTranslator]: Completed translation [2018-12-02 14:27:44,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44 WrapperNode [2018-12-02 14:27:44,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 14:27:44,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 14:27:44,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 14:27:44,314 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 14:27:44,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 14:27:44,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 14:27:44,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 14:27:44,345 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 14:27:44,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... [2018-12-02 14:27:44,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 14:27:44,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 14:27:44,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 14:27:44,364 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 14:27:44,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:27:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-02 14:27:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 14:27:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 14:27:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-02 14:27:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-02 14:27:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 14:27:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 14:27:44,525 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 14:27:44,525 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-02 14:27:44,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:27:44 BoogieIcfgContainer [2018-12-02 14:27:44,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 14:27:44,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 14:27:44,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 14:27:44,528 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 14:27:44,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:27:43" (1/3) ... [2018-12-02 14:27:44,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bda367a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:27:44, skipping insertion in model container [2018-12-02 14:27:44,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:27:44" (2/3) ... [2018-12-02 14:27:44,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bda367a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:27:44, skipping insertion in model container [2018-12-02 14:27:44,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:27:44" (3/3) ... [2018-12-02 14:27:44,530 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-02 14:27:44,536 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 14:27:44,541 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-12-02 14:27:44,550 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-12-02 14:27:44,566 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 14:27:44,566 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 14:27:44,566 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 14:27:44,566 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 14:27:44,567 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 14:27:44,567 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 14:27:44,567 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 14:27:44,567 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 14:27:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-02 14:27:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-02 14:27:44,582 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:27:44,582 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:27:44,583 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:27:44,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:27:44,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2013139840, now seen corresponding path program 1 times [2018-12-02 14:27:44,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:27:44,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:44,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:27:44,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:44,623 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:27:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:27:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:44,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:27:44,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 14:27:44,708 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 14:27:44,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 14:27:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 14:27:44,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:27:44,720 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2018-12-02 14:27:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:27:44,765 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2018-12-02 14:27:44,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 14:27:44,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-02 14:27:44,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:27:44,772 INFO L225 Difference]: With dead ends: 63 [2018-12-02 14:27:44,772 INFO L226 Difference]: Without dead ends: 60 [2018-12-02 14:27:44,773 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 [2018-12-02 14:27:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-02 14:27:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2018-12-02 14:27:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-02 14:27:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-12-02 14:27:44,798 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2018-12-02 14:27:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:27:44,799 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-12-02 14:27:44,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 14:27:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-12-02 14:27:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-02 14:27:44,800 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:27:44,800 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:27:44,800 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:27:44,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:27:44,800 INFO L82 PathProgramCache]: Analyzing trace with hash -539017121, now seen corresponding path program 1 times [2018-12-02 14:27:44,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:27:44,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:44,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:27:44,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:44,802 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:27:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:27:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:44,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:27:44,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 14:27:44,828 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 14:27:44,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 14:27:44,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 14:27:44,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 14:27:44,830 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 3 states. [2018-12-02 14:27:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:27:44,868 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2018-12-02 14:27:44,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 14:27:44,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-12-02 14:27:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:27:44,869 INFO L225 Difference]: With dead ends: 60 [2018-12-02 14:27:44,869 INFO L226 Difference]: Without dead ends: 57 [2018-12-02 14:27:44,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 14:27:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-02 14:27:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2018-12-02 14:27:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-02 14:27:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2018-12-02 14:27:44,873 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 17 [2018-12-02 14:27:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:27:44,873 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2018-12-02 14:27:44,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 14:27:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2018-12-02 14:27:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 14:27:44,874 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:27:44,874 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:27:44,874 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:27:44,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:27:44,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2017437412, now seen corresponding path program 1 times [2018-12-02 14:27:44,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:27:44,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:44,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:27:44,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:44,875 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:27:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:27:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:44,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:27:44,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 14:27:44,909 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 14:27:44,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 14:27:44,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 14:27:44,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:27:44,910 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 5 states. [2018-12-02 14:27:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:27:44,954 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2018-12-02 14:27:44,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 14:27:44,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-12-02 14:27:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:27:44,955 INFO L225 Difference]: With dead ends: 58 [2018-12-02 14:27:44,955 INFO L226 Difference]: Without dead ends: 58 [2018-12-02 14:27:44,955 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 [2018-12-02 14:27:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-02 14:27:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-02 14:27:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-02 14:27:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2018-12-02 14:27:44,961 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 18 [2018-12-02 14:27:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:27:44,962 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2018-12-02 14:27:44,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 14:27:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2018-12-02 14:27:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 14:27:44,962 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:27:44,963 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:27:44,963 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:27:44,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:27:44,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2017437411, now seen corresponding path program 1 times [2018-12-02 14:27:44,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:27:44,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:44,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:27:44,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:44,965 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:27:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:27:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:45,002 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:27:45,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 14:27:45,002 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 14:27:45,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 14:27:45,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 14:27:45,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-02 14:27:45,003 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 4 states. [2018-12-02 14:27:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:27:45,021 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2018-12-02 14:27:45,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 14:27:45,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-02 14:27:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:27:45,022 INFO L225 Difference]: With dead ends: 81 [2018-12-02 14:27:45,022 INFO L226 Difference]: Without dead ends: 81 [2018-12-02 14:27:45,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-02 14:27:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-12-02 14:27:45,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2018-12-02 14:27:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-02 14:27:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2018-12-02 14:27:45,026 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 18 [2018-12-02 14:27:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:27:45,026 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2018-12-02 14:27:45,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 14:27:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2018-12-02 14:27:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 14:27:45,027 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:27:45,027 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:27:45,027 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:27:45,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:27:45,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1629427199, now seen corresponding path program 1 times [2018-12-02 14:27:45,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:27:45,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:45,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:27:45,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:45,028 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:27:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:27:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:45,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 14:27:45,089 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 14:27:45,089 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-02 14:27:45,090 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [14], [16], [20], [28], [30], [35], [37], [66], [67], [68], [70], [72], [73], [74], [75] [2018-12-02 14:27:45,110 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 14:27:45,110 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 14:27:45,200 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 14:27:45,201 INFO L272 AbstractInterpreter]: Visited 20 different actions 23 times. Never merged. Never widened. Performed 176 root evaluator evaluations with a maximum evaluation depth of 3. Performed 176 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 27 variables. [2018-12-02 14:27:45,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:27:45,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 14:27:45,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 14:27:45,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:27:45,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:27:45,214 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 14:27:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:27:45,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:27:45,262 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 [2018-12-02 14:27:45,263 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:27:45,264 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:27:45,265 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 14:27:45,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:27:45,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:27:45,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-02 14:27:45,292 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:27:45,297 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 14:27:45,297 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-02 14:27:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:45,313 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 14:27:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:45,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 14:27:45,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2018-12-02 14:27:45,491 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 14:27:45,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 14:27:45,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 14:27:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-12-02 14:27:45,492 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 9 states. [2018-12-02 14:27:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:27:48,425 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2018-12-02 14:27:48,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 14:27:48,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-12-02 14:27:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:27:48,427 INFO L225 Difference]: With dead ends: 136 [2018-12-02 14:27:48,427 INFO L226 Difference]: Without dead ends: 136 [2018-12-02 14:27:48,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2018-12-02 14:27:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-12-02 14:27:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 62. [2018-12-02 14:27:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-02 14:27:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2018-12-02 14:27:48,433 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 23 [2018-12-02 14:27:48,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:27:48,434 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2018-12-02 14:27:48,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 14:27:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2018-12-02 14:27:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 14:27:48,434 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:27:48,435 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:27:48,435 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:27:48,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:27:48,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1629427198, now seen corresponding path program 1 times [2018-12-02 14:27:48,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:27:48,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:48,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:27:48,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:27:48,437 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:27:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:27:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:48,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 14:27:48,546 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 14:27:48,546 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-02 14:27:48,546 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [14], [16], [20], [28], [30], [35], [38], [66], [67], [68], [70], [72], [73], [74], [75] [2018-12-02 14:27:48,547 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 14:27:48,547 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 14:27:48,571 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 14:27:48,571 INFO L272 AbstractInterpreter]: Visited 20 different actions 23 times. Never merged. Never widened. Performed 177 root evaluator evaluations with a maximum evaluation depth of 4. Performed 177 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 27 variables. [2018-12-02 14:27:48,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:27:48,572 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 14:27:48,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 14:27:48,573 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:27:48,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:27:48,579 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 14:27:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:27:48,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:27:48,598 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 [2018-12-02 14:27:48,598 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:27:48,603 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 [2018-12-02 14:27:48,603 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 14:27:48,607 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:27:48,607 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:19, output treesize:14 [2018-12-02 14:27:48,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:27:48,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:27:48,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-12-02 14:27:48,652 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:27:48,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2018-12-02 14:27:48,663 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 14:27:48,668 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:27:48,668 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:12 [2018-12-02 14:27:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:27:48,670 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 14:27:48,742 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2018-12-02 14:28:03,579 WARN L180 SmtUtils]: Spent 10.07 s on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2018-12-02 14:28:03,587 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2018-12-02 14:28:03,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2018-12-02 14:28:03,732 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2018-12-02 14:28:03,743 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-12-02 14:28:03,744 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2018-12-02 14:28:03,745 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,747 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,751 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:26, output treesize:5 [2018-12-02 14:28:03,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2018-12-02 14:28:03,854 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2018-12-02 14:28:03,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2018-12-02 14:28:03,870 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,870 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-12-02 14:28:03,871 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,873 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:03,878 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 14:28:03,878 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:31, output treesize:14 [2018-12-02 14:28:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:28:03,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 14:28:03,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2018-12-02 14:28:03,931 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 14:28:03,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 14:28:03,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 14:28:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=293, Unknown=2, NotChecked=0, Total=342 [2018-12-02 14:28:03,932 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 11 states. [2018-12-02 14:28:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:04,324 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2018-12-02 14:28:04,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 14:28:04,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-12-02 14:28:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:04,326 INFO L225 Difference]: With dead ends: 148 [2018-12-02 14:28:04,326 INFO L226 Difference]: Without dead ends: 148 [2018-12-02 14:28:04,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=138, Invalid=672, Unknown=2, NotChecked=0, Total=812 [2018-12-02 14:28:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-02 14:28:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 66. [2018-12-02 14:28:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-02 14:28:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2018-12-02 14:28:04,331 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 23 [2018-12-02 14:28:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:04,331 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2018-12-02 14:28:04,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 14:28:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2018-12-02 14:28:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 14:28:04,332 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:04,332 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:04,332 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:28:04,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2134985824, now seen corresponding path program 1 times [2018-12-02 14:28:04,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:28:04,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:28:04,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:04,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:28:04,333 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:28:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 14:28:04,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 14:28:04,354 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 14:28:04,354 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-02 14:28:04,355 INFO L205 CegarAbsIntRunner]: [0], [3], [4], [5], [6], [7], [14], [16], [20], [28], [30], [35], [37], [66], [67], [68], [70], [72], [73], [74], [75] [2018-12-02 14:28:04,356 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 14:28:04,356 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 14:28:04,382 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 14:28:04,382 INFO L272 AbstractInterpreter]: Visited 21 different actions 29 times. Merged at 2 different actions 4 times. Never widened. Performed 196 root evaluator evaluations with a maximum evaluation depth of 3. Performed 196 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-12-02 14:28:04,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:04,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 14:28:04,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 14:28:04,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:04,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:04,401 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 14:28:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:04,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:28:04,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 14:28:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 14:28:04,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-02 14:28:04,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 5 [2018-12-02 14:28:04,472 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 14:28:04,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 14:28:04,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 14:28:04,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:04,473 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 5 states. [2018-12-02 14:28:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:04,481 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2018-12-02 14:28:04,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 14:28:04,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-02 14:28:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:04,482 INFO L225 Difference]: With dead ends: 46 [2018-12-02 14:28:04,482 INFO L226 Difference]: Without dead ends: 44 [2018-12-02 14:28:04,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-02 14:28:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-02 14:28:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-02 14:28:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2018-12-02 14:28:04,484 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2018-12-02 14:28:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:04,484 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2018-12-02 14:28:04,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 14:28:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2018-12-02 14:28:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 14:28:04,485 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:04,485 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:04,485 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:28:04,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1783473613, now seen corresponding path program 1 times [2018-12-02 14:28:04,485 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:28:04,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:28:04,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:04,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:28:04,486 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:28:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 14:28:04,507 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:28:04,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 14:28:04,508 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 14:28:04,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 14:28:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 14:28:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:04,508 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2018-12-02 14:28:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:04,522 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2018-12-02 14:28:04,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 14:28:04,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-12-02 14:28:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:04,523 INFO L225 Difference]: With dead ends: 70 [2018-12-02 14:28:04,523 INFO L226 Difference]: Without dead ends: 70 [2018-12-02 14:28:04,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-02 14:28:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-02 14:28:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-12-02 14:28:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-02 14:28:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-12-02 14:28:04,527 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2018-12-02 14:28:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:04,527 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-12-02 14:28:04,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 14:28:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-12-02 14:28:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 14:28:04,528 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:04,528 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:04,528 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:28:04,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:04,528 INFO L82 PathProgramCache]: Analyzing trace with hash -768683348, now seen corresponding path program 1 times [2018-12-02 14:28:04,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:28:04,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:28:04,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:04,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:28:04,530 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:28:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 14:28:04,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:28:04,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 14:28:04,550 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 14:28:04,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 14:28:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 14:28:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 14:28:04,551 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 4 states. [2018-12-02 14:28:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:04,570 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2018-12-02 14:28:04,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 14:28:04,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-12-02 14:28:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:04,571 INFO L225 Difference]: With dead ends: 53 [2018-12-02 14:28:04,571 INFO L226 Difference]: Without dead ends: 53 [2018-12-02 14:28:04,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-02 14:28:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2018-12-02 14:28:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-02 14:28:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2018-12-02 14:28:04,574 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2018-12-02 14:28:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:04,574 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2018-12-02 14:28:04,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 14:28:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2018-12-02 14:28:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 14:28:04,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:04,575 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:04,575 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION]=== [2018-12-02 14:28:04,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash 29629726, now seen corresponding path program 1 times [2018-12-02 14:28:04,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:28:04,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:28:04,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:04,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:28:04,577 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:28:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 14:28:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 14:28:04,600 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 14:28:04,608 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-02 14:28:04,615 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 42 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-02 14:28:04,616 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 41 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-02 14:28:04,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:28:04 BoogieIcfgContainer [2018-12-02 14:28:04,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 14:28:04,624 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 14:28:04,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 14:28:04,624 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 14:28:04,624 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:27:44" (3/4) ... [2018-12-02 14:28:04,627 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 14:28:04,627 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 14:28:04,627 INFO L168 Benchmark]: Toolchain (without parser) took 20651.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 204.5 MB). Free memory was 953.4 MB in the beginning and 980.2 MB in the end (delta: -26.7 MB). Peak memory consumption was 177.7 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:04,628 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 14:28:04,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 953.4 MB in the beginning and 1.1 GB in the end (delta: -144.9 MB). Peak memory consumption was 32.0 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:04,629 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.57 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. [2018-12-02 14:28:04,629 INFO L168 Benchmark]: Boogie Preprocessor took 19.05 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. [2018-12-02 14:28:04,629 INFO L168 Benchmark]: RCFGBuilder took 161.68 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: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:04,629 INFO L168 Benchmark]: TraceAbstraction took 20097.64 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 76.0 MB). Free memory was 1.1 GB in the beginning and 980.2 MB in the end (delta: 92.8 MB). Peak memory consumption was 168.8 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:04,630 INFO L168 Benchmark]: Witness Printer took 3.37 ms. Allocated memory is still 1.2 GB. Free memory is still 980.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 14:28:04,632 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 336.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 953.4 MB in the beginning and 1.1 GB in the end (delta: -144.9 MB). Peak memory consumption was 32.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.57 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 19.05 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 161.68 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: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20097.64 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 76.0 MB). Free memory was 1.1 GB in the beginning and 980.2 MB in the end (delta: 92.8 MB). Peak memory consumption was 168.8 MB. Max. memory is 11.5 GB. * Witness Printer took 3.37 ms. Allocated memory is still 1.2 GB. Free memory is still 980.2 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 ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 42 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 41 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: 1458]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1458. 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={44:0}] [L1459] CALL entry_point() VAL [ldv_global_msg_list={44:0}] [L1439] int len = 10; VAL [ldv_global_msg_list={44:0}, len=10] [L1440] CALL, EXPR ldv_malloc(sizeof(struct A18*)*len) VAL [\old(size)=40, ldv_global_msg_list={44:0}] [L1073] COND TRUE __VERIFIER_nondet_int() [L1074] return malloc(size); VAL [\old(size)=40, \result={45:0}, ldv_global_msg_list={44:0}, malloc(size)={45:0}, size=40] [L1440] RET, EXPR ldv_malloc(sizeof(struct A18*)*len) VAL [ldv_global_msg_list={44:0}, ldv_malloc(sizeof(struct A18*)*len)={45:0}, len=10] [L1440] struct A18 **array = (struct A18 **)ldv_malloc(sizeof(struct A18*)*len); [L1441] struct A18 *p; [L1442] int i=0; [L1443] int j; VAL [array={45:0}, i=0, ldv_global_msg_list={44:0}, len=10] [L1444] COND FALSE !(!array) VAL [array={45:0}, i=0, ldv_global_msg_list={44:0}, len=10] [L1445] COND TRUE i=0) VAL [array={45:0}, i=0, j=-1, ldv_global_msg_list={44:0}, len=10, p={0:0}] [L1459] RET entry_point() VAL [ldv_global_msg_list={44:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 7 error locations. UNSAFE Result, 20.0s OverallTime, 10 OverallIterations, 2 TraceHistogramMax, 3.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 428 SDtfs, 405 SDslu, 1084 SDs, 0 SdLazy, 911 SolverSat, 76 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 240 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 312 ConstructedInterpolants, 28 QuantifiedInterpolants, 37416 SizeOfPredicates, 14 NumberOfNonLiveVariables, 402 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 25/44 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 [2018-12-02 14:28:05,941 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 14:28:05,942 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 14:28:05,948 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 14:28:05,948 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 14:28:05,948 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 14:28:05,949 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 14:28:05,950 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 14:28:05,951 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 14:28:05,951 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 14:28:05,951 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 14:28:05,951 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 14:28:05,952 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 14:28:05,952 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 14:28:05,953 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 14:28:05,953 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 14:28:05,953 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 14:28:05,954 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 14:28:05,955 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 14:28:05,956 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 14:28:05,956 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 14:28:05,957 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 14:28:05,958 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 14:28:05,958 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 14:28:05,958 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 14:28:05,959 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 14:28:05,959 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 14:28:05,960 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 14:28:05,960 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 14:28:05,960 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 14:28:05,961 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 14:28:05,961 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 14:28:05,961 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 14:28:05,961 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 14:28:05,961 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 14:28:05,962 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 14:28:05,962 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-02 14:28:05,969 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 14:28:05,969 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 14:28:05,970 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 14:28:05,970 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 14:28:05,970 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 14:28:05,970 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 14:28:05,970 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 14:28:05,970 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 14:28:05,970 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 14:28:05,970 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 14:28:05,971 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 14:28:05,971 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 14:28:05,971 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 14:28:05,971 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 14:28:05,971 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 14:28:05,971 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 14:28:05,971 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 14:28:05,971 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 14:28:05,972 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 14:28:05,972 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 14:28:05,973 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 14:28:05,973 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 14:28:05,973 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 14:28:05,973 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 14:28:05,973 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 14:28:05,973 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 14:28:05,973 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 14:28:05,973 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 14:28:05,973 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_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 -> 1e7b1c8d88255aaa07a4a2fabadf999511fb9c76 [2018-12-02 14:28:05,992 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 14:28:06,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 14:28:06,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 14:28:06,005 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 14:28:06,006 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 14:28:06,006 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-02 14:28:06,047 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data/87279739e/6bcfa7ad53c24cffbcd77cf2eee9e403/FLAG19640e38d [2018-12-02 14:28:06,403 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 14:28:06,404 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-02 14:28:06,411 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data/87279739e/6bcfa7ad53c24cffbcd77cf2eee9e403/FLAG19640e38d [2018-12-02 14:28:06,419 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/data/87279739e/6bcfa7ad53c24cffbcd77cf2eee9e403 [2018-12-02 14:28:06,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 14:28:06,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 14:28:06,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 14:28:06,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 14:28:06,424 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 14:28:06,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76840cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06, skipping insertion in model container [2018-12-02 14:28:06,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 14:28:06,454 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 14:28:06,644 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 14:28:06,657 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 14:28:06,732 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 14:28:06,764 INFO L195 MainTranslator]: Completed translation [2018-12-02 14:28:06,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06 WrapperNode [2018-12-02 14:28:06,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 14:28:06,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 14:28:06,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 14:28:06,766 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 14:28:06,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 14:28:06,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 14:28:06,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 14:28:06,787 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 14:28:06,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... [2018-12-02 14:28:06,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 14:28:06,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 14:28:06,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 14:28:06,806 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 14:28:06,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 14:28:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-02 14:28:06,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-02 14:28:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 14:28:06,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 14:28:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 14:28:06,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 14:28:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 14:28:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 14:28:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 14:28:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-02 14:28:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-02 14:28:06,838 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-02 14:28:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 14:28:06,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 14:28:07,031 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 14:28:07,031 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-02 14:28:07,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:28:07 BoogieIcfgContainer [2018-12-02 14:28:07,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 14:28:07,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 14:28:07,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 14:28:07,034 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 14:28:07,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:28:06" (1/3) ... [2018-12-02 14:28:07,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3f6e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:28:07, skipping insertion in model container [2018-12-02 14:28:07,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:28:06" (2/3) ... [2018-12-02 14:28:07,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3f6e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:28:07, skipping insertion in model container [2018-12-02 14:28:07,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:28:07" (3/3) ... [2018-12-02 14:28:07,036 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-02 14:28:07,041 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 14:28:07,045 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-12-02 14:28:07,054 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-12-02 14:28:07,068 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 14:28:07,069 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 14:28:07,069 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 14:28:07,069 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 14:28:07,069 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 14:28:07,069 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 14:28:07,069 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 14:28:07,069 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 14:28:07,069 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 14:28:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-02 14:28:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-02 14:28:07,082 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:07,083 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:07,084 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:07,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:07,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2013139840, now seen corresponding path program 1 times [2018-12-02 14:28:07,090 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:07,090 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:07,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:07,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:28:07,178 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 14:28:07,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:28:07,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 14:28:07,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 14:28:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 14:28:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:07,192 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2018-12-02 14:28:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:07,291 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2018-12-02 14:28:07,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 14:28:07,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-02 14:28:07,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:07,299 INFO L225 Difference]: With dead ends: 63 [2018-12-02 14:28:07,299 INFO L226 Difference]: Without dead ends: 60 [2018-12-02 14:28:07,300 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 [2018-12-02 14:28:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-02 14:28:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2018-12-02 14:28:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-02 14:28:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-12-02 14:28:07,325 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2018-12-02 14:28:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:07,326 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-12-02 14:28:07,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 14:28:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-12-02 14:28:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-02 14:28:07,327 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:07,327 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:07,327 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:07,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:07,327 INFO L82 PathProgramCache]: Analyzing trace with hash -539017121, now seen corresponding path program 1 times [2018-12-02 14:28:07,328 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:07,328 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:07,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:07,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:28:07,371 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 14:28:07,372 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:28:07,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 14:28:07,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 14:28:07,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 14:28:07,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 14:28:07,374 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 3 states. [2018-12-02 14:28:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:07,437 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2018-12-02 14:28:07,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 14:28:07,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-12-02 14:28:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:07,438 INFO L225 Difference]: With dead ends: 60 [2018-12-02 14:28:07,438 INFO L226 Difference]: Without dead ends: 57 [2018-12-02 14:28:07,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 14:28:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-02 14:28:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2018-12-02 14:28:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-02 14:28:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2018-12-02 14:28:07,443 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 17 [2018-12-02 14:28:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:07,443 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2018-12-02 14:28:07,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 14:28:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2018-12-02 14:28:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 14:28:07,443 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:07,443 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:07,444 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:07,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2017437412, now seen corresponding path program 1 times [2018-12-02 14:28:07,444 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:07,444 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:07,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:07,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:28:07,507 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 14:28:07,509 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:28:07,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 14:28:07,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 14:28:07,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 14:28:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-02 14:28:07,510 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2018-12-02 14:28:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:07,553 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2018-12-02 14:28:07,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 14:28:07,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-02 14:28:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:07,555 INFO L225 Difference]: With dead ends: 76 [2018-12-02 14:28:07,555 INFO L226 Difference]: Without dead ends: 76 [2018-12-02 14:28:07,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-02 14:28:07,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-02 14:28:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2018-12-02 14:28:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-02 14:28:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2018-12-02 14:28:07,561 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 18 [2018-12-02 14:28:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:07,562 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2018-12-02 14:28:07,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 14:28:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2018-12-02 14:28:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 14:28:07,563 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:07,563 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:07,563 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:07,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:07,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1629427199, now seen corresponding path program 1 times [2018-12-02 14:28:07,564 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:07,564 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:07,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:07,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:07,642 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 [2018-12-02 14:28:07,644 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:07,646 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:07,646 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 14:28:08,658 WARN L854 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#t~malloc12.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |ldv_malloc_#t~malloc12.base|) (_ bv0 1)) (= (store |c_old(#valid)| |ldv_malloc_#t~malloc12.base| (_ bv1 1)) |c_#valid|))) is different from true [2018-12-02 14:28:08,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:28:08,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:28:08,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-02 14:28:08,667 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:08,674 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 14:28:08,675 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-02 14:28:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-12-02 14:28:08,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 14:28:08,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 14:28:08,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:08,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:08,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:08,769 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 [2018-12-02 14:28:08,769 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:08,770 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:08,771 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 14:28:08,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:28:08,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:28:08,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-02 14:28:08,784 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:08,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 14:28:08,797 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-02 14:28:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-12-02 14:28:08,802 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 14:28:08,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 14:28:08,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-02 14:28:08,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 14:28:08,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 14:28:08,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2018-12-02 14:28:08,856 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 8 states. [2018-12-02 14:28:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:11,221 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2018-12-02 14:28:11,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 14:28:11,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-12-02 14:28:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:11,223 INFO L225 Difference]: With dead ends: 95 [2018-12-02 14:28:11,223 INFO L226 Difference]: Without dead ends: 95 [2018-12-02 14:28:11,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=26, Invalid=67, Unknown=1, NotChecked=16, Total=110 [2018-12-02 14:28:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-02 14:28:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2018-12-02 14:28:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-02 14:28:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2018-12-02 14:28:11,228 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 23 [2018-12-02 14:28:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:11,228 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2018-12-02 14:28:11,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 14:28:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2018-12-02 14:28:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 14:28:11,228 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:11,229 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:11,229 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:11,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1629427198, now seen corresponding path program 1 times [2018-12-02 14:28:11,229 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:11,229 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:11,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:11,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:11,316 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 [2018-12-02 14:28:11,316 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:11,330 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 [2018-12-02 14:28:11,330 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:11,339 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:11,339 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-02 14:28:12,127 WARN L854 $PredicateComparison]: unable to prove that (exists ((ldv_malloc_~size (_ BitVec 32)) (|ldv_malloc_#t~malloc12.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |ldv_malloc_#t~malloc12.base| ldv_malloc_~size)) (= (select |c_old(#valid)| |ldv_malloc_#t~malloc12.base|) (_ bv0 1)))) is different from true [2018-12-02 14:28:12,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:28:12,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:28:12,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-12-02 14:28:12,141 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2018-12-02 14:28:12,169 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,183 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,183 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:30, output treesize:14 [2018-12-02 14:28:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-12-02 14:28:12,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 14:28:12,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 14:28:12,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:12,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:12,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:12,524 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 [2018-12-02 14:28:12,524 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,534 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 [2018-12-02 14:28:12,534 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,540 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,540 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-02 14:28:12,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:28:12,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 14:28:12,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2018-12-02 14:28:12,552 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2018-12-02 14:28:12,568 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,580 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 14:28:12,580 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:14 [2018-12-02 14:28:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-12-02 14:28:12,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 14:28:12,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 14:28:12,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-02 14:28:12,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 14:28:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 14:28:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=88, Unknown=1, NotChecked=18, Total=132 [2018-12-02 14:28:12,750 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 10 states. [2018-12-02 14:28:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:13,278 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2018-12-02 14:28:13,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 14:28:13,278 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-12-02 14:28:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:13,279 INFO L225 Difference]: With dead ends: 100 [2018-12-02 14:28:13,279 INFO L226 Difference]: Without dead ends: 100 [2018-12-02 14:28:13,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=221, Unknown=1, NotChecked=30, Total=306 [2018-12-02 14:28:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-02 14:28:13,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2018-12-02 14:28:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-02 14:28:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2018-12-02 14:28:13,283 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 23 [2018-12-02 14:28:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:13,283 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2018-12-02 14:28:13,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 14:28:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2018-12-02 14:28:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 14:28:13,283 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:13,284 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:13,284 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:13,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2134985824, now seen corresponding path program 1 times [2018-12-02 14:28:13,284 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:13,284 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 14:28:13,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:13,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:28:13,343 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 14:28:13,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:28:13,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 14:28:13,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 14:28:13,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 14:28:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:13,346 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 5 states. [2018-12-02 14:28:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:13,378 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2018-12-02 14:28:13,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 14:28:13,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-02 14:28:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:13,379 INFO L225 Difference]: With dead ends: 46 [2018-12-02 14:28:13,379 INFO L226 Difference]: Without dead ends: 44 [2018-12-02 14:28:13,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-02 14:28:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-02 14:28:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-02 14:28:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2018-12-02 14:28:13,382 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2018-12-02 14:28:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:13,382 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2018-12-02 14:28:13,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 14:28:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2018-12-02 14:28:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 14:28:13,382 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:13,382 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:13,382 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:13,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:13,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1783473613, now seen corresponding path program 1 times [2018-12-02 14:28:13,383 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:13,383 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:13,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:13,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 14:28:13,427 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 14:28:13,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:28:13,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 14:28:13,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 14:28:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 14:28:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:13,429 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2018-12-02 14:28:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:13,462 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2018-12-02 14:28:13,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 14:28:13,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-12-02 14:28:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:13,463 INFO L225 Difference]: With dead ends: 70 [2018-12-02 14:28:13,463 INFO L226 Difference]: Without dead ends: 70 [2018-12-02 14:28:13,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-02 14:28:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-02 14:28:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-12-02 14:28:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-02 14:28:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-12-02 14:28:13,466 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2018-12-02 14:28:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:13,466 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-12-02 14:28:13,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 14:28:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-12-02 14:28:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 14:28:13,466 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:13,466 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:13,466 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:13,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:13,467 INFO L82 PathProgramCache]: Analyzing trace with hash -768683348, now seen corresponding path program 1 times [2018-12-02 14:28:13,467 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:13,467 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/bin-2019/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 14:28:13,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:28:13,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:28:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 14:28:13,524 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 14:28:13,526 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:28:13,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 14:28:13,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 14:28:13,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 14:28:13,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 14:28:13,527 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 4 states. [2018-12-02 14:28:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:28:13,579 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2018-12-02 14:28:13,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 14:28:13,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-12-02 14:28:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:28:13,580 INFO L225 Difference]: With dead ends: 53 [2018-12-02 14:28:13,581 INFO L226 Difference]: Without dead ends: 53 [2018-12-02 14:28:13,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 14:28:13,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-02 14:28:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2018-12-02 14:28:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-02 14:28:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2018-12-02 14:28:13,584 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2018-12-02 14:28:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:28:13,584 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2018-12-02 14:28:13,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 14:28:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2018-12-02 14:28:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 14:28:13,585 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:28:13,585 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:28:13,585 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-02 14:28:13,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:28:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 29629726, now seen corresponding path program 1 times [2018-12-02 14:28:13,585 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 14:28:13,585 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d0dc64c5-1d32-46a2-bce9-bcd462f51340/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 [2018-12-02 14:28:13,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:28:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 14:28:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 14:28:13,692 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 14:28:13,698 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-02 14:28:13,704 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# [2018-12-02 14:28:13,704 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# [2018-12-02 14:28:13,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:28:13 BoogieIcfgContainer [2018-12-02 14:28:13,710 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 14:28:13,710 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 14:28:13,710 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 14:28:13,710 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 14:28:13,710 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:28:07" (3/4) ... [2018-12-02 14:28:13,712 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 14:28:13,713 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 14:28:13,713 INFO L168 Benchmark]: Toolchain (without parser) took 7291.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.7 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -179.4 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:13,714 INFO L168 Benchmark]: CDTParser took 0.17 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. [2018-12-02 14:28:13,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -177.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:13,714 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.23 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:13,714 INFO L168 Benchmark]: Boogie Preprocessor took 18.37 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. [2018-12-02 14:28:13,715 INFO L168 Benchmark]: RCFGBuilder took 226.29 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: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:13,715 INFO L168 Benchmark]: TraceAbstraction took 6677.62 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -33.9 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. [2018-12-02 14:28:13,715 INFO L168 Benchmark]: Witness Printer took 2.75 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. [2018-12-02 14:28:13,717 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 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 342.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -177.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.23 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.37 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 226.29 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: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6677.62 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -33.9 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.75 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. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - 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: 1458]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1458. 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={-2146401247:0}] [L1459] CALL entry_point() VAL [ldv_global_msg_list={-2146401247:0}] [L1439] int len = 10; VAL [ldv_global_msg_list={-2146401247:0}, len=10] [L1440] CALL, EXPR ldv_malloc(sizeof(struct A18*)*len) VAL [\old(size)=40, ldv_global_msg_list={-2146401247:0}] [L1073] COND TRUE __VERIFIER_nondet_int() [L1074] return malloc(size); VAL [\old(size)=40, \result={1082401:0}, ldv_global_msg_list={-2146401247:0}, malloc(size)={1082401:0}, size=40] [L1440] RET, EXPR ldv_malloc(sizeof(struct A18*)*len) VAL [ldv_global_msg_list={-2146401247:0}, ldv_malloc(sizeof(struct A18*)*len)={1082401:0}, len=10] [L1440] struct A18 **array = (struct A18 **)ldv_malloc(sizeof(struct A18*)*len); [L1441] struct A18 *p; [L1442] int i=0; [L1443] int j; VAL [array={1082401:0}, i=0, ldv_global_msg_list={-2146401247:0}, len=10] [L1444] COND FALSE !(!array) VAL [array={1082401:0}, i=0, ldv_global_msg_list={-2146401247:0}, len=10] [L1445] COND TRUE i=0) VAL [array={1082401:0}, i=0, j=4294967295, ldv_global_msg_list={-2146401247:0}, len=10, p={0:0}] [L1459] RET entry_point() VAL [ldv_global_msg_list={-2146401247:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 7 error locations. UNSAFE Result, 6.6s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 348 SDtfs, 285 SDslu, 763 SDs, 0 SdLazy, 540 SolverSat, 49 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 233 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=5, 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, 8 MinimizatonAttempts, 147 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 244 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 207 ConstructedInterpolants, 14 QuantifiedInterpolants, 19573 SizeOfPredicates, 24 NumberOfNonLiveVariables, 877 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 18/28 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...