./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.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_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i -s /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 86b203c3a804c103d90401bd32cfcff28939b920 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i -s /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 86b203c3a804c103d90401bd32cfcff28939b920 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 16:56:38,845 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 16:56:38,845 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 16:56:38,851 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 16:56:38,852 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 16:56:38,852 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 16:56:38,853 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 16:56:38,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 16:56:38,854 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 16:56:38,854 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 16:56:38,855 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 16:56:38,855 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 16:56:38,855 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 16:56:38,856 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 16:56:38,856 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 16:56:38,857 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 16:56:38,857 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 16:56:38,858 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 16:56:38,859 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 16:56:38,859 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 16:56:38,860 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 16:56:38,860 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 16:56:38,861 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 16:56:38,861 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 16:56:38,861 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 16:56:38,862 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 16:56:38,862 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 16:56:38,863 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 16:56:38,863 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 16:56:38,864 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 16:56:38,864 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 16:56:38,864 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 16:56:38,864 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 16:56:38,864 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 16:56:38,865 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 16:56:38,865 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 16:56:38,865 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-08 16:56:38,872 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 16:56:38,872 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 16:56:38,872 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 16:56:38,873 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 16:56:38,873 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 16:56:38,874 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 16:56:38,874 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 16:56:38,874 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 16:56:38,874 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 16:56:38,874 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 16:56:38,874 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 16:56:38,874 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 16:56:38,874 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 16:56:38,875 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 16:56:38,875 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 16:56:38,875 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 16:56:38,876 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 16:56:38,876 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 16:56:38,876 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 16:56:38,876 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 16:56:38,876 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_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 -> 86b203c3a804c103d90401bd32cfcff28939b920 [2018-12-08 16:56:38,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 16:56:38,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 16:56:38,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 16:56:38,902 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 16:56:38,902 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 16:56:38,902 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i [2018-12-08 16:56:38,938 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data/c82eb18eb/68d91b9f6f63413f93278f29dc139647/FLAGc4ad17b2a [2018-12-08 16:56:39,393 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 16:56:39,394 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i [2018-12-08 16:56:39,400 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data/c82eb18eb/68d91b9f6f63413f93278f29dc139647/FLAGc4ad17b2a [2018-12-08 16:56:39,408 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data/c82eb18eb/68d91b9f6f63413f93278f29dc139647 [2018-12-08 16:56:39,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 16:56:39,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 16:56:39,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 16:56:39,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 16:56:39,413 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 16:56:39,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672981cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39, skipping insertion in model container [2018-12-08 16:56:39,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 16:56:39,438 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 16:56:39,577 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:56:39,584 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 16:56:39,660 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:56:39,683 INFO L195 MainTranslator]: Completed translation [2018-12-08 16:56:39,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39 WrapperNode [2018-12-08 16:56:39,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 16:56:39,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 16:56:39,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 16:56:39,684 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 16:56:39,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 16:56:39,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 16:56:39,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 16:56:39,704 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 16:56:39,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... [2018-12-08 16:56:39,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 16:56:39,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 16:56:39,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 16:56:39,721 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 16:56:39,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-08 16:56:39,751 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-08 16:56:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 16:56:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2018-12-08 16:56:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2018-12-08 16:56:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 16:56:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 16:56:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 16:56:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 16:56:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-08 16:56:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-08 16:56:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 16:56:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 16:56:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 16:56:39,876 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 16:56:39,876 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 16:56:39,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:56:39 BoogieIcfgContainer [2018-12-08 16:56:39,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 16:56:39,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 16:56:39,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 16:56:39,880 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 16:56:39,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 04:56:39" (1/3) ... [2018-12-08 16:56:39,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b8cb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:56:39, skipping insertion in model container [2018-12-08 16:56:39,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:39" (2/3) ... [2018-12-08 16:56:39,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b8cb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:56:39, skipping insertion in model container [2018-12-08 16:56:39,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:56:39" (3/3) ... [2018-12-08 16:56:39,881 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy_true-valid-memsafety.i [2018-12-08 16:56:39,887 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 16:56:39,891 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2018-12-08 16:56:39,899 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2018-12-08 16:56:39,916 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 16:56:39,916 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-08 16:56:39,916 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 16:56:39,916 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 16:56:39,916 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 16:56:39,916 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 16:56:39,916 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 16:56:39,917 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 16:56:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-12-08 16:56:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 16:56:39,931 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:39,932 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:39,933 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-08 16:56:39,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:39,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1281537684, now seen corresponding path program 1 times [2018-12-08 16:56:39,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:56:39,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:39,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:39,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:39,970 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:56:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:40,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:56:40,122 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:56:40,122 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-08 16:56:40,124 INFO L205 CegarAbsIntRunner]: [0], [1], [11], [14], [38], [44], [46], [47], [48], [49], [50], [52], [53], [54], [55] [2018-12-08 16:56:40,145 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:56:40,145 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:56:40,222 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:56:40,223 INFO L272 AbstractInterpreter]: Visited 15 different actions 19 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 14 variables. [2018-12-08 16:56:40,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:40,227 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:56:40,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:56:40,228 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:40,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:40,235 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:56:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:40,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:40,280 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 [2018-12-08 16:56:40,281 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:40,287 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:40,288 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-08 16:56:40,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:40,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:40,318 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 [2018-12-08 16:56:40,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:40,324 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. [2018-12-08 16:56:40,325 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-08 16:56:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:40,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:56:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:40,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:56:40,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2018-12-08 16:56:40,611 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:56:40,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 16:56:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 16:56:40,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-12-08 16:56:40,622 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 10 states. [2018-12-08 16:56:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:56:41,372 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-08 16:56:41,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 16:56:41,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-12-08 16:56:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:56:41,381 INFO L225 Difference]: With dead ends: 39 [2018-12-08 16:56:41,381 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 16:56:41,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-12-08 16:56:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 16:56:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-08 16:56:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 16:56:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-08 16:56:41,409 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 19 [2018-12-08 16:56:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:56:41,410 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-08 16:56:41,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 16:56:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-08 16:56:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 16:56:41,411 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:41,411 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:41,411 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-08 16:56:41,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:41,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1281537685, now seen corresponding path program 1 times [2018-12-08 16:56:41,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:56:41,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:41,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:41,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:41,413 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:56:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:41,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:56:41,496 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:56:41,496 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-08 16:56:41,496 INFO L205 CegarAbsIntRunner]: [0], [1], [11], [15], [38], [44], [46], [47], [48], [49], [50], [52], [53], [54], [55] [2018-12-08 16:56:41,497 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:56:41,498 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:56:41,521 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:56:41,522 INFO L272 AbstractInterpreter]: Visited 15 different actions 19 times. Never merged. Never widened. Performed 87 root evaluator evaluations with a maximum evaluation depth of 3. Performed 87 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 14 variables. [2018-12-08 16:56:41,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:41,527 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:56:41,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:56:41,527 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:41,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:41,534 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:56:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:41,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:41,555 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 [2018-12-08 16:56:41,556 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:41,566 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 [2018-12-08 16:56:41,566 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:41,572 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:41,572 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-08 16:56:41,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:41,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:41,657 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 [2018-12-08 16:56:41,657 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:41,663 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 [2018-12-08 16:56:41,664 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:41,669 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-08 16:56:41,669 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2018-12-08 16:56:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:41,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:56:41,750 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2018-12-08 16:56:45,022 WARN L180 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2018-12-08 16:56:45,361 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-12-08 16:56:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:45,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:56:45,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2018-12-08 16:56:45,420 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:56:45,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 16:56:45,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 16:56:45,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=396, Unknown=2, NotChecked=0, Total=462 [2018-12-08 16:56:45,421 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 15 states. [2018-12-08 16:56:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:56:45,572 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-12-08 16:56:45,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 16:56:45,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2018-12-08 16:56:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:56:45,573 INFO L225 Difference]: With dead ends: 28 [2018-12-08 16:56:45,573 INFO L226 Difference]: Without dead ends: 28 [2018-12-08 16:56:45,574 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=108, Invalid=592, Unknown=2, NotChecked=0, Total=702 [2018-12-08 16:56:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-08 16:56:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-08 16:56:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-08 16:56:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-12-08 16:56:45,576 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2018-12-08 16:56:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:56:45,576 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-12-08 16:56:45,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 16:56:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-12-08 16:56:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-08 16:56:45,577 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:45,577 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:45,577 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-08 16:56:45,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1934355428, now seen corresponding path program 1 times [2018-12-08 16:56:45,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:56:45,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:45,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:45,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:45,579 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:56:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 16:56:45,646 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:56:45,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-08 16:56:45,646 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:56:45,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 16:56:45,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 16:56:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-08 16:56:45,646 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2018-12-08 16:56:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:56:45,699 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-12-08 16:56:45,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 16:56:45,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-12-08 16:56:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:56:45,700 INFO L225 Difference]: With dead ends: 27 [2018-12-08 16:56:45,700 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 16:56:45,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-12-08 16:56:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 16:56:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-08 16:56:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 16:56:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-08 16:56:45,702 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 28 [2018-12-08 16:56:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:56:45,702 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-08 16:56:45,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 16:56:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-08 16:56:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 16:56:45,702 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:45,702 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:45,703 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-08 16:56:45,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:45,703 INFO L82 PathProgramCache]: Analyzing trace with hash -164523811, now seen corresponding path program 1 times [2018-12-08 16:56:45,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:56:45,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:45,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:45,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:45,704 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:56:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:45,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:56:45,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-12-08 16:56:45,804 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:56:45,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 16:56:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 16:56:45,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:56:45,805 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-12-08 16:56:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:56:45,960 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-08 16:56:45,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 16:56:45,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-12-08 16:56:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:56:45,961 INFO L225 Difference]: With dead ends: 26 [2018-12-08 16:56:45,961 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 16:56:45,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2018-12-08 16:56:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 16:56:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-08 16:56:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 16:56:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-12-08 16:56:45,963 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 29 [2018-12-08 16:56:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:56:45,963 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-12-08 16:56:45,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 16:56:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-12-08 16:56:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-08 16:56:45,963 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:45,963 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:45,964 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-12-08 16:56:45,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash -805270777, now seen corresponding path program 1 times [2018-12-08 16:56:45,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:56:45,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:45,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:45,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:56:45,965 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:56:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 16:56:46,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:56:46,186 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:56:46,186 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-12-08 16:56:46,186 INFO L205 CegarAbsIntRunner]: [0], [1], [11], [13], [16], [17], [20], [23], [24], [27], [29], [31], [33], [35], [37], [38], [44], [46], [47], [48], [49], [50], [52], [53], [54], [55] [2018-12-08 16:56:46,187 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:56:46,187 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:56:46,211 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:56:46,212 INFO L272 AbstractInterpreter]: Visited 26 different actions 30 times. Never merged. Never widened. Performed 163 root evaluator evaluations with a maximum evaluation depth of 3. Performed 163 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 25 variables. [2018-12-08 16:56:46,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:46,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:56:46,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:56:46,213 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:46,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:46,221 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:56:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:46,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:46,269 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,272 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,273 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:23 [2018-12-08 16:56:46,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-08 16:56:46,295 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 8 treesize of output 7 [2018-12-08 16:56:46,295 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,297 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,302 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,302 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:35 [2018-12-08 16:56:46,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2018-12-08 16:56:46,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2018-12-08 16:56:46,345 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,349 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,353 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,353 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:50, output treesize:35 [2018-12-08 16:56:46,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2018-12-08 16:56:46,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2018-12-08 16:56:46,357 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,360 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,364 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,364 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2018-12-08 16:56:46,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:46,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-08 16:56:46,410 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 23 treesize of output 15 [2018-12-08 16:56:46,411 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,420 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,424 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. [2018-12-08 16:56:46,425 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2018-12-08 16:56:46,446 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:46,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:46,448 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 [2018-12-08 16:56:46,448 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:46,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-08 16:56:46,454 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:25 [2018-12-08 16:56:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-08 16:56:46,479 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:56:46,836 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:56:46,838 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: This case should habe been handled by DER at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:217) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:209) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.convert(DerPreprocessor.java:190) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:253) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:211) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:221) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.elimAllRec(ElimStorePlain.java:199) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:293) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-12-08 16:56:46,845 INFO L168 Benchmark]: Toolchain (without parser) took 7434.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:56:46,848 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:56:46,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -161.9 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-12-08 16:56:46,851 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-08 16:56:46,852 INFO L168 Benchmark]: Boogie Preprocessor took 16.28 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:56:46,853 INFO L168 Benchmark]: RCFGBuilder took 156.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-12-08 16:56:46,854 INFO L168 Benchmark]: TraceAbstraction took 6966.09 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 35.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -43.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:56:46,861 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 272.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -161.9 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.28 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 156.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6966.09 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 35.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -43.8 MB). There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: This case should habe been handled by DER: de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:217) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-08 16:56:48,174 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 16:56:48,175 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 16:56:48,181 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 16:56:48,182 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 16:56:48,182 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 16:56:48,183 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 16:56:48,184 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 16:56:48,184 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 16:56:48,185 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 16:56:48,185 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 16:56:48,185 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 16:56:48,186 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 16:56:48,186 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 16:56:48,187 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 16:56:48,187 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 16:56:48,188 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 16:56:48,188 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 16:56:48,189 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 16:56:48,190 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 16:56:48,191 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 16:56:48,191 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 16:56:48,192 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 16:56:48,193 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 16:56:48,193 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 16:56:48,193 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 16:56:48,194 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 16:56:48,194 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 16:56:48,194 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 16:56:48,195 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 16:56:48,195 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 16:56:48,195 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 16:56:48,196 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 16:56:48,196 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 16:56:48,196 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 16:56:48,196 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 16:56:48,197 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-08 16:56:48,204 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 16:56:48,204 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 16:56:48,205 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 16:56:48,205 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 16:56:48,205 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 16:56:48,205 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 16:56:48,205 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 16:56:48,205 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 16:56:48,205 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 16:56:48,205 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 16:56:48,206 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 16:56:48,206 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 16:56:48,206 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 16:56:48,206 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 16:56:48,206 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 16:56:48,206 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 16:56:48,206 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 16:56:48,206 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 16:56:48,207 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 16:56:48,207 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 16:56:48,208 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 16:56:48,208 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 16:56:48,208 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 16:56:48,208 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 16:56:48,208 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-08 16:56:48,208 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 16:56:48,208 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-08 16:56:48,208 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_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 -> 86b203c3a804c103d90401bd32cfcff28939b920 [2018-12-08 16:56:48,230 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 16:56:48,238 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 16:56:48,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 16:56:48,241 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 16:56:48,241 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 16:56:48,242 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i [2018-12-08 16:56:48,284 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data/e412d69b1/5489e267f1444592a10e20ba1aea7447/FLAGdc4d09f55 [2018-12-08 16:56:48,676 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 16:56:48,677 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i [2018-12-08 16:56:48,683 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data/e412d69b1/5489e267f1444592a10e20ba1aea7447/FLAGdc4d09f55 [2018-12-08 16:56:49,044 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/data/e412d69b1/5489e267f1444592a10e20ba1aea7447 [2018-12-08 16:56:49,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 16:56:49,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 16:56:49,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 16:56:49,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 16:56:49,061 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 16:56:49,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1534ec65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49, skipping insertion in model container [2018-12-08 16:56:49,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 16:56:49,094 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 16:56:49,241 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:56:49,246 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 16:56:49,271 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:56:49,294 INFO L195 MainTranslator]: Completed translation [2018-12-08 16:56:49,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49 WrapperNode [2018-12-08 16:56:49,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 16:56:49,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 16:56:49,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 16:56:49,296 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 16:56:49,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 16:56:49,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 16:56:49,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 16:56:49,351 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 16:56:49,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... [2018-12-08 16:56:49,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 16:56:49,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 16:56:49,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 16:56:49,369 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 16:56:49,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-08 16:56:49,400 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-08 16:56:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 16:56:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2018-12-08 16:56:49,400 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2018-12-08 16:56:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 16:56:49,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 16:56:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 16:56:49,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 16:56:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-08 16:56:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-08 16:56:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 16:56:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 16:56:49,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 16:56:49,548 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 16:56:49,549 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 16:56:49,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:56:49 BoogieIcfgContainer [2018-12-08 16:56:49,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 16:56:49,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 16:56:49,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 16:56:49,551 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 16:56:49,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 04:56:49" (1/3) ... [2018-12-08 16:56:49,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dba6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:56:49, skipping insertion in model container [2018-12-08 16:56:49,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:56:49" (2/3) ... [2018-12-08 16:56:49,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dba6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:56:49, skipping insertion in model container [2018-12-08 16:56:49,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:56:49" (3/3) ... [2018-12-08 16:56:49,553 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy_true-valid-memsafety.i [2018-12-08 16:56:49,560 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 16:56:49,564 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2018-12-08 16:56:49,574 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2018-12-08 16:56:49,592 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 16:56:49,592 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 16:56:49,592 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-08 16:56:49,593 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 16:56:49,593 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 16:56:49,593 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 16:56:49,593 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 16:56:49,593 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 16:56:49,593 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 16:56:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-12-08 16:56:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 16:56:49,612 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:49,613 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:49,614 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr7REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION]=== [2018-12-08 16:56:49,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:49,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1281537684, now seen corresponding path program 1 times [2018-12-08 16:56:49,621 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 16:56:49,622 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:49,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:49,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:49,714 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 [2018-12-08 16:56:49,715 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:49,719 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:49,719 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-08 16:56:50,136 WARN L854 $PredicateComparison]: unable to prove that (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |alloc_node_#t~malloc2.base| (_ bv1 1)))) is different from true [2018-12-08 16:56:50,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 14 treesize of output 11 [2018-12-08 16:56:50,146 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:50,157 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. [2018-12-08 16:56:50,157 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2018-12-08 16:56:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-08 16:56:50,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:56:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:50,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:56:50,266 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:50,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:50,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:50,295 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 [2018-12-08 16:56:50,295 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:50,297 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:50,297 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-08 16:56:50,884 WARN L854 $PredicateComparison]: unable to prove that (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |alloc_node_#t~malloc2.base| (_ bv1 1))) (= (select |c_old(#valid)| |alloc_node_#t~malloc2.base|) (_ bv0 1)))) is different from true [2018-12-08 16:56:50,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:50,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:50,896 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 [2018-12-08 16:56:50,896 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:50,905 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. [2018-12-08 16:56:50,905 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-08 16:56:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-08 16:56:50,926 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:56:50,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:56:50,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 10 [2018-12-08 16:56:50,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 16:56:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 16:56:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=66, Unknown=7, NotChecked=34, Total=132 [2018-12-08 16:56:50,995 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2018-12-08 16:56:51,876 WARN L180 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2018-12-08 16:56:52,783 WARN L180 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-12-08 16:56:54,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:56:54,950 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-08 16:56:54,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 16:56:54,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-12-08 16:56:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:56:54,956 INFO L225 Difference]: With dead ends: 39 [2018-12-08 16:56:54,956 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 16:56:54,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=50, Invalid=156, Unknown=12, NotChecked=54, Total=272 [2018-12-08 16:56:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 16:56:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-08 16:56:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 16:56:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-08 16:56:54,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 19 [2018-12-08 16:56:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:56:54,984 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-08 16:56:54,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 16:56:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-08 16:56:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 16:56:54,986 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:54,986 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:54,986 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr7REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION]=== [2018-12-08 16:56:54,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:54,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1281537685, now seen corresponding path program 1 times [2018-12-08 16:56:54,986 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 16:56:54,987 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:55,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:55,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:55,041 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 [2018-12-08 16:56:55,041 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:55,049 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 [2018-12-08 16:56:55,049 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:55,058 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:55,058 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-08 16:56:55,817 WARN L854 $PredicateComparison]: unable to prove that (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |alloc_node_#t~malloc2.base| (_ bv4 32))) (= (select |c_old(#valid)| |alloc_node_#t~malloc2.base|) (_ bv0 1)))) is different from true [2018-12-08 16:56:55,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:55,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:55,829 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 [2018-12-08 16:56:55,830 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:55,842 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 [2018-12-08 16:56:55,842 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:55,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-08 16:56:55,851 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:18 [2018-12-08 16:56:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-08 16:56:55,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:56:56,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:56:56,045 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:56:56,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:56,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:56,066 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 [2018-12-08 16:56:56,066 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,075 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 [2018-12-08 16:56:56,075 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,084 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-08 16:56:56,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:56,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:56,095 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 [2018-12-08 16:56:56,096 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,105 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 [2018-12-08 16:56:56,106 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,114 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-08 16:56:56,114 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2018-12-08 16:56:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-08 16:56:56,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:56:56,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:56:56,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-08 16:56:56,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 16:56:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 16:56:56,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2018-12-08 16:56:56,208 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2018-12-08 16:56:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:56:56,443 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-12-08 16:56:56,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 16:56:56,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-12-08 16:56:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:56:56,444 INFO L225 Difference]: With dead ends: 28 [2018-12-08 16:56:56,444 INFO L226 Difference]: Without dead ends: 28 [2018-12-08 16:56:56,445 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2018-12-08 16:56:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-08 16:56:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-08 16:56:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-08 16:56:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-12-08 16:56:56,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2018-12-08 16:56:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:56:56,448 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-12-08 16:56:56,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 16:56:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-12-08 16:56:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-08 16:56:56,449 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:56,449 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:56,449 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr7REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION]=== [2018-12-08 16:56:56,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1934355428, now seen corresponding path program 1 times [2018-12-08 16:56:56,450 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 16:56:56,450 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 16:56:56,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:56,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:56,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-08 16:56:56,516 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 8 treesize of output 7 [2018-12-08 16:56:56,517 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,518 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,520 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,520 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2018-12-08 16:56:56,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2018-12-08 16:56:56,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 16 treesize of output 7 [2018-12-08 16:56:56,543 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,545 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,546 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,546 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:23, output treesize:7 [2018-12-08 16:56:56,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-12-08 16:56:56,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-12-08 16:56:56,550 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,551 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,552 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,552 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-12-08 16:56:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 16:56:56,567 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 16:56:56,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:56:56,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-08 16:56:56,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 16:56:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 16:56:56,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-08 16:56:56,569 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2018-12-08 16:56:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:56:56,662 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-12-08 16:56:56,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 16:56:56,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-12-08 16:56:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:56:56,663 INFO L225 Difference]: With dead ends: 27 [2018-12-08 16:56:56,663 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 16:56:56,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-12-08 16:56:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 16:56:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-08 16:56:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 16:56:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-08 16:56:56,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 28 [2018-12-08 16:56:56,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:56:56,665 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-08 16:56:56,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 16:56:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-08 16:56:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 16:56:56,666 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:56,666 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:56,666 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr7REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION]=== [2018-12-08 16:56:56,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:56,666 INFO L82 PathProgramCache]: Analyzing trace with hash -164523811, now seen corresponding path program 1 times [2018-12-08 16:56:56,666 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 16:56:56,666 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/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 [2018-12-08 16:56:56,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:56,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:56,732 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 [2018-12-08 16:56:56,732 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,733 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,734 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-08 16:56:56,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:56,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:56,794 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 19 treesize of output 23 [2018-12-08 16:56:56,794 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,800 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,800 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2018-12-08 16:56:56,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-08 16:56:56,824 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-08 16:56:56,824 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,826 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,834 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,834 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2018-12-08 16:56:56,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2018-12-08 16:56:56,889 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2018-12-08 16:56:56,890 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,894 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,900 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,900 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:27 [2018-12-08 16:56:56,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2018-12-08 16:56:56,906 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 21 treesize of output 12 [2018-12-08 16:56:56,906 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,911 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,916 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,917 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:19 [2018-12-08 16:56:56,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 16:56:56,964 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 21 treesize of output 17 [2018-12-08 16:56:56,965 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:56,973 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. [2018-12-08 16:56:56,973 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:13 [2018-12-08 16:56:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:56:56,994 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 16:56:56,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:56:56,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-12-08 16:56:56,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 16:56:56,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 16:56:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:56:57,002 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-12-08 16:56:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:56:57,377 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-08 16:56:57,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 16:56:57,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-12-08 16:56:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:56:57,378 INFO L225 Difference]: With dead ends: 26 [2018-12-08 16:56:57,378 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 16:56:57,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-12-08 16:56:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 16:56:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-08 16:56:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 16:56:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-12-08 16:56:57,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 29 [2018-12-08 16:56:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:56:57,381 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-12-08 16:56:57,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 16:56:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-12-08 16:56:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-08 16:56:57,382 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:56:57,382 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:56:57,382 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr7REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION]=== [2018-12-08 16:56:57,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:56:57,383 INFO L82 PathProgramCache]: Analyzing trace with hash -805270777, now seen corresponding path program 1 times [2018-12-08 16:56:57,383 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 16:56:57,383 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 16:56:57,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:56:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:56:57,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:56:57,470 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 [2018-12-08 16:56:57,470 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,471 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,471 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-08 16:56:57,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-08 16:56:57,618 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-08 16:56:57,619 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,621 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,633 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,633 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:44 [2018-12-08 16:56:57,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 38 [2018-12-08 16:56:57,720 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2018-12-08 16:56:57,720 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,726 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,736 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:44 [2018-12-08 16:56:57,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2018-12-08 16:56:57,741 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 33 treesize of output 22 [2018-12-08 16:56:57,741 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,747 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,755 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:56:57,755 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:32 [2018-12-08 16:57:00,425 WARN L180 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-12-08 16:57:20,094 WARN L180 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 25 [2018-12-08 16:57:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 16:57:20,097 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 16:57:20,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:57:20,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2018-12-08 16:57:20,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-08 16:57:20,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-08 16:57:20,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=253, Unknown=11, NotChecked=0, Total=306 [2018-12-08 16:57:20,099 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2018-12-08 16:57:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:57:33,909 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-12-08 16:57:33,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 16:57:33,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2018-12-08 16:57:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:57:33,911 INFO L225 Difference]: With dead ends: 25 [2018-12-08 16:57:33,911 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 16:57:33,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=96, Invalid=647, Unknown=13, NotChecked=0, Total=756 [2018-12-08 16:57:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 16:57:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 16:57:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 16:57:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 16:57:33,912 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2018-12-08 16:57:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:57:33,912 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 16:57:33,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-08 16:57:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 16:57:33,913 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 16:57:33,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 04:57:33 BoogieIcfgContainer [2018-12-08 16:57:33,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 16:57:33,916 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 16:57:33,916 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 16:57:33,916 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 16:57:33,917 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:56:49" (3/4) ... [2018-12-08 16:57:33,919 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 16:57:33,922 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 16:57:33,923 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2018-12-08 16:57:33,923 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 16:57:33,923 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure alloc_node [2018-12-08 16:57:33,925 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-08 16:57:33,926 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-08 16:57:33,926 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 16:57:33,948 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5f1d063b-c64d-4c0d-8e32-93fd55161f20/bin-2019/utaipan/witness.graphml [2018-12-08 16:57:33,949 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 16:57:33,949 INFO L168 Benchmark]: Toolchain (without parser) took 44898.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 938.0 MB in the beginning and 970.6 MB in the end (delta: -32.6 MB). Peak memory consumption was 146.2 MB. Max. memory is 11.5 GB. [2018-12-08 16:57:33,950 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:57:33,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.17 ms. Allocated memory is still 1.0 GB. Free memory was 938.0 MB in the beginning and 916.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2018-12-08 16:57:33,950 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.89 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 916.5 MB in the beginning and 1.1 GB in the end (delta: -171.1 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-12-08 16:57:33,950 INFO L168 Benchmark]: Boogie Preprocessor took 18.14 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:57:33,951 INFO L168 Benchmark]: RCFGBuilder took 180.28 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2018-12-08 16:57:33,951 INFO L168 Benchmark]: TraceAbstraction took 44366.23 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 72.4 MB). Free memory was 1.1 GB in the beginning and 978.1 MB in the end (delta: 91.6 MB). Peak memory consumption was 163.9 MB. Max. memory is 11.5 GB. [2018-12-08 16:57:33,951 INFO L168 Benchmark]: Witness Printer took 32.72 ms. Allocated memory is still 1.2 GB. Free memory was 978.1 MB in the beginning and 970.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2018-12-08 16:57:33,953 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 241.17 ms. Allocated memory is still 1.0 GB. Free memory was 938.0 MB in the beginning and 916.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 54.89 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 916.5 MB in the beginning and 1.1 GB in the end (delta: -171.1 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.14 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 180.28 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 44366.23 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 72.4 MB). Free memory was 1.1 GB in the beginning and 978.1 MB in the end (delta: 91.6 MB). Peak memory consumption was 163.9 MB. Max. memory is 11.5 GB. * Witness Printer took 32.72 ms. Allocated memory is still 1.2 GB. Free memory was 978.1 MB in the beginning and 970.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 572]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 568]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 570]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 573]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 571]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 571]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 570]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 574]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 572]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 574]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 571]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 573]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 571]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 13 error locations. SAFE Result, 44.3s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 18.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 76 SDtfs, 96 SDslu, 334 SDs, 0 SdLazy, 745 SolverSat, 48 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 12.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 30.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 25.3s InterpolantComputationTime, 163 NumberOfCodeBlocks, 163 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 174 ConstructedInterpolants, 29 QuantifiedInterpolants, 43781 SizeOfPredicates, 43 NumberOfNonLiveVariables, 533 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 20/40 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...