./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_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/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_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/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_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/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_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/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 [2018-12-02 17:07:44,778 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 17:07:44,779 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 17:07:44,785 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 17:07:44,785 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 17:07:44,786 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 17:07:44,786 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 17:07:44,787 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 17:07:44,788 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 17:07:44,788 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 17:07:44,789 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 17:07:44,789 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 17:07:44,789 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 17:07:44,790 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 17:07:44,790 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 17:07:44,791 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 17:07:44,791 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 17:07:44,792 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 17:07:44,793 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 17:07:44,793 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 17:07:44,794 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 17:07:44,794 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 17:07:44,795 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 17:07:44,795 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 17:07:44,795 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 17:07:44,796 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 17:07:44,796 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 17:07:44,797 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 17:07:44,797 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 17:07:44,797 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 17:07:44,798 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 17:07:44,798 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 17:07:44,798 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 17:07:44,798 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 17:07:44,798 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 17:07:44,799 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 17:07:44,799 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-02 17:07:44,806 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 17:07:44,806 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 17:07:44,807 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 17:07:44,807 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 17:07:44,807 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 17:07:44,808 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 17:07:44,808 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 17:07:44,808 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 17:07:44,808 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 17:07:44,808 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 17:07:44,808 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 17:07:44,808 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 17:07:44,808 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 17:07:44,809 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 17:07:44,809 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 17:07:44,809 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 17:07:44,810 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 17:07:44,810 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 17:07:44,810 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 17:07:44,810 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 17:07:44,810 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_e9faf979-812e-4ee3-856c-97bec8a9a422/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 [2018-12-02 17:07:44,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 17:07:44,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 17:07:44,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 17:07:44,835 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 17:07:44,835 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 17:07:44,836 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i [2018-12-02 17:07:44,868 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data/a14898c06/7bd4863e702f4b42b5d136cd6cb80311/FLAG34bf43191 [2018-12-02 17:07:45,265 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 17:07:45,265 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i [2018-12-02 17:07:45,271 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data/a14898c06/7bd4863e702f4b42b5d136cd6cb80311/FLAG34bf43191 [2018-12-02 17:07:45,280 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data/a14898c06/7bd4863e702f4b42b5d136cd6cb80311 [2018-12-02 17:07:45,282 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 17:07:45,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 17:07:45,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 17:07:45,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 17:07:45,286 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 17:07:45,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211e4e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45, skipping insertion in model container [2018-12-02 17:07:45,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 17:07:45,316 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 17:07:45,454 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 17:07:45,460 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 17:07:45,524 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 17:07:45,543 INFO L195 MainTranslator]: Completed translation [2018-12-02 17:07:45,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45 WrapperNode [2018-12-02 17:07:45,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 17:07:45,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 17:07:45,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 17:07:45,544 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 17:07:45,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 17:07:45,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 17:07:45,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 17:07:45,561 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 17:07:45,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... [2018-12-02 17:07:45,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 17:07:45,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 17:07:45,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 17:07:45,576 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 17:07:45,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 17:07:45,608 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-02 17:07:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-02 17:07:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 17:07:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2018-12-02 17:07:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2018-12-02 17:07:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 17:07:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 17:07:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 17:07:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 17:07:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 17:07:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 17:07:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 17:07:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 17:07:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 17:07:45,748 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 17:07:45,748 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 17:07:45,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:45 BoogieIcfgContainer [2018-12-02 17:07:45,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 17:07:45,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 17:07:45,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 17:07:45,751 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 17:07:45,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:07:45" (1/3) ... [2018-12-02 17:07:45,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8236927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:07:45, skipping insertion in model container [2018-12-02 17:07:45,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:45" (2/3) ... [2018-12-02 17:07:45,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8236927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:07:45, skipping insertion in model container [2018-12-02 17:07:45,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:45" (3/3) ... [2018-12-02 17:07:45,753 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy_true-valid-memsafety.i [2018-12-02 17:07:45,761 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 17:07:45,767 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2018-12-02 17:07:45,776 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2018-12-02 17:07:45,795 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 17:07:45,795 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 17:07:45,795 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 17:07:45,795 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 17:07:45,796 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 17:07:45,796 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 17:07:45,796 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 17:07:45,796 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 17:07:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-12-02 17:07:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 17:07:45,810 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:07:45,811 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 17:07:45,812 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-02 17:07:45,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:45,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1281537684, now seen corresponding path program 1 times [2018-12-02 17:07:45,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 17:07:45,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:45,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:45,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:45,853 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 17:07:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:07:46,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 17:07:46,004 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 17:07:46,004 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-02 17:07:46,006 INFO L205 CegarAbsIntRunner]: [0], [1], [11], [14], [38], [44], [46], [47], [48], [49], [50], [52], [53], [54], [55] [2018-12-02 17:07:46,027 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 17:07:46,027 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 17:07:46,103 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 17:07:46,104 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. [2018-12-02 17:07:46,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:46,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 17:07:46,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 17:07:46,109 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 17:07:46,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:46,115 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 17:07:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:46,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:07:46,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:07:46,161 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:46,162 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:46,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 17:07:46,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:46,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:46,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-02 17:07:46,192 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:46,197 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 17:07:46,197 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-02 17:07:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:07:46,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 17:07:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:07:46,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 17:07:46,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2018-12-02 17:07:46,512 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 17:07:46,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 17:07:46,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 17:07:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-12-02 17:07:46,523 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 10 states. [2018-12-02 17:07:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:07:47,268 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-02 17:07:47,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 17:07:47,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-12-02 17:07:47,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:07:47,274 INFO L225 Difference]: With dead ends: 39 [2018-12-02 17:07:47,274 INFO L226 Difference]: Without dead ends: 33 [2018-12-02 17:07:47,276 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 [2018-12-02 17:07:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-02 17:07:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-02 17:07:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-02 17:07:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-02 17:07:47,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 19 [2018-12-02 17:07:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:07:47,303 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-02 17:07:47,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 17:07:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-02 17:07:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 17:07:47,305 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:07:47,305 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 17:07:47,305 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-02 17:07:47,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:47,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1281537685, now seen corresponding path program 1 times [2018-12-02 17:07:47,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 17:07:47,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:47,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:47,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:47,307 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 17:07:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:07:47,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 17:07:47,396 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 17:07:47,397 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-02 17:07:47,397 INFO L205 CegarAbsIntRunner]: [0], [1], [11], [15], [38], [44], [46], [47], [48], [49], [50], [52], [53], [54], [55] [2018-12-02 17:07:47,397 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 17:07:47,398 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 17:07:47,416 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 17:07:47,416 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. [2018-12-02 17:07:47,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:47,417 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 17:07:47,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 17:07:47,418 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 17:07:47,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:47,426 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 17:07:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:47,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:07:47,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:07:47,446 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:47,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:07:47,451 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:47,455 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:47,455 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-02 17:07:47,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:47,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:47,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-12-02 17:07:47,529 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:47,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2018-12-02 17:07:47,536 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:47,542 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. [2018-12-02 17:07:47,542 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2018-12-02 17:07:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:07:47,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 17:07:47,617 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2018-12-02 17:07:52,162 WARN L180 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2018-12-02 17:07:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:07:52,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 17:07:52,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2018-12-02 17:07:52,356 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 17:07:52,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 17:07:52,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 17:07:52,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=396, Unknown=2, NotChecked=0, Total=462 [2018-12-02 17:07:52,357 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 15 states. [2018-12-02 17:07:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:07:52,507 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-12-02 17:07:52,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 17:07:52,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2018-12-02 17:07:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:07:52,508 INFO L225 Difference]: With dead ends: 28 [2018-12-02 17:07:52,508 INFO L226 Difference]: Without dead ends: 28 [2018-12-02 17:07:52,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=108, Invalid=592, Unknown=2, NotChecked=0, Total=702 [2018-12-02 17:07:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-02 17:07:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-02 17:07:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-02 17:07:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-12-02 17:07:52,510 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2018-12-02 17:07:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:07:52,511 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-12-02 17:07:52,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 17:07:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-12-02 17:07:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-02 17:07:52,511 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:07:52,511 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] [2018-12-02 17:07:52,511 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-02 17:07:52,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:52,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1934355428, now seen corresponding path program 1 times [2018-12-02 17:07:52,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 17:07:52,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:52,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:52,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:52,513 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 17:07:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 17:07:52,563 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 17:07:52,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-02 17:07:52,564 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 17:07:52,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 17:07:52,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 17:07:52,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-02 17:07:52,564 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2018-12-02 17:07:52,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:07:52,632 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-12-02 17:07:52,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 17:07:52,632 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-12-02 17:07:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:07:52,633 INFO L225 Difference]: With dead ends: 27 [2018-12-02 17:07:52,633 INFO L226 Difference]: Without dead ends: 27 [2018-12-02 17:07:52,633 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 [2018-12-02 17:07:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-02 17:07:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-02 17:07:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 17:07:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-02 17:07:52,635 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 28 [2018-12-02 17:07:52,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:07:52,635 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-02 17:07:52,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 17:07:52,635 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-02 17:07:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 17:07:52,636 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:07:52,636 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] [2018-12-02 17:07:52,636 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-02 17:07:52,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash -164523811, now seen corresponding path program 1 times [2018-12-02 17:07:52,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 17:07:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:52,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:52,637 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 17:07:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:07:52,733 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 17:07:52,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-12-02 17:07:52,733 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 17:07:52,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 17:07:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 17:07:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-12-02 17:07:52,734 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-12-02 17:07:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:07:52,868 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-02 17:07:52,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 17:07:52,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-12-02 17:07:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:07:52,869 INFO L225 Difference]: With dead ends: 26 [2018-12-02 17:07:52,869 INFO L226 Difference]: Without dead ends: 26 [2018-12-02 17:07:52,869 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 [2018-12-02 17:07:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-02 17:07:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-02 17:07:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-02 17:07:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-12-02 17:07:52,871 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 29 [2018-12-02 17:07:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:07:52,872 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-12-02 17:07:52,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 17:07:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-12-02 17:07:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-02 17:07:52,872 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:07:52,872 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] [2018-12-02 17:07:52,873 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-02 17:07:52,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash -805270777, now seen corresponding path program 1 times [2018-12-02 17:07:52,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 17:07:52,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:52,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:52,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 17:07:52,874 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 17:07:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 17:07:53,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 17:07:53,092 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 17:07:53,092 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-12-02 17:07:53,092 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] [2018-12-02 17:07:53,093 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 17:07:53,093 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 17:07:53,119 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 17:07:53,119 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. [2018-12-02 17:07:53,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:53,120 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 17:07:53,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 17:07:53,120 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 17:07:53,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:53,129 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 17:07:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:53,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:07:53,173 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,182 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,182 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:23 [2018-12-02 17:07:53,213 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 [2018-12-02 17:07:53,214 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 [2018-12-02 17:07:53,214 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,216 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,220 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,221 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:35 [2018-12-02 17:07:53,259 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 [2018-12-02 17:07:53,261 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 [2018-12-02 17:07:53,261 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,265 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,269 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,269 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:50, output treesize:35 [2018-12-02 17:07:53,272 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 [2018-12-02 17:07:53,273 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 [2018-12-02 17:07:53,273 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,277 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,280 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,280 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2018-12-02 17:07:53,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:53,325 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 [2018-12-02 17:07:53,327 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 [2018-12-02 17:07:53,327 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,338 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,342 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 17:07:53,342 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2018-12-02 17:07:53,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:53,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:53,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-02 17:07:53,365 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:53,372 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. [2018-12-02 17:07:53,372 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:25 [2018-12-02 17:07:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 17:07:53,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 17:07:53,737 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 17:07:53,738 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) [2018-12-02 17:07:53,742 INFO L168 Benchmark]: Toolchain (without parser) took 8459.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -183.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 17:07:53,743 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 17:07:53,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -163.5 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. [2018-12-02 17:07:53,744 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-02 17:07:53,744 INFO L168 Benchmark]: Boogie Preprocessor took 14.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 17:07:53,744 INFO L168 Benchmark]: RCFGBuilder took 172.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2018-12-02 17:07:53,745 INFO L168 Benchmark]: TraceAbstraction took 7992.52 ms. Allocated memory was 1.2 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: -42.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 17:07:53,747 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 260.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -163.5 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 172.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7992.52 ms. Allocated memory was 1.2 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: -42.2 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 [2018-12-02 17:07:55,016 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 17:07:55,017 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 17:07:55,024 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 17:07:55,024 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 17:07:55,025 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 17:07:55,026 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 17:07:55,027 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 17:07:55,028 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 17:07:55,028 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 17:07:55,029 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 17:07:55,029 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 17:07:55,030 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 17:07:55,030 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 17:07:55,031 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 17:07:55,032 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 17:07:55,032 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 17:07:55,033 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 17:07:55,035 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 17:07:55,036 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 17:07:55,036 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 17:07:55,037 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 17:07:55,039 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 17:07:55,039 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 17:07:55,039 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 17:07:55,040 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 17:07:55,041 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 17:07:55,041 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 17:07:55,042 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 17:07:55,042 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 17:07:55,043 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 17:07:55,043 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 17:07:55,043 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 17:07:55,043 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 17:07:55,044 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 17:07:55,044 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 17:07:55,044 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-02 17:07:55,055 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 17:07:55,055 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 17:07:55,056 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 17:07:55,056 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 17:07:55,056 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 17:07:55,056 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 17:07:55,056 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 17:07:55,057 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 17:07:55,057 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 17:07:55,057 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 17:07:55,057 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 17:07:55,057 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 17:07:55,058 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 17:07:55,058 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 17:07:55,058 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 17:07:55,058 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 17:07:55,058 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 17:07:55,058 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 17:07:55,058 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 17:07:55,058 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 17:07:55,058 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 17:07:55,059 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 17:07:55,059 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 17:07:55,059 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 17:07:55,060 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 17:07:55,060 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 17:07:55,060 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 17:07:55,060 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 17:07:55,060 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_e9faf979-812e-4ee3-856c-97bec8a9a422/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 [2018-12-02 17:07:55,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 17:07:55,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 17:07:55,095 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 17:07:55,096 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 17:07:55,096 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 17:07:55,097 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i [2018-12-02 17:07:55,140 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data/0cd797902/d98a369a38454c8985a3000e76586559/FLAGd8b88bfd3 [2018-12-02 17:07:55,559 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 17:07:55,559 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_true-valid-memsafety.i [2018-12-02 17:07:55,565 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data/0cd797902/d98a369a38454c8985a3000e76586559/FLAGd8b88bfd3 [2018-12-02 17:07:55,573 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/data/0cd797902/d98a369a38454c8985a3000e76586559 [2018-12-02 17:07:55,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 17:07:55,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 17:07:55,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 17:07:55,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 17:07:55,579 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 17:07:55,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54932da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55, skipping insertion in model container [2018-12-02 17:07:55,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 17:07:55,613 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 17:07:55,762 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 17:07:55,768 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 17:07:55,791 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 17:07:55,812 INFO L195 MainTranslator]: Completed translation [2018-12-02 17:07:55,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55 WrapperNode [2018-12-02 17:07:55,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 17:07:55,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 17:07:55,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 17:07:55,813 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 17:07:55,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 17:07:55,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 17:07:55,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 17:07:55,865 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 17:07:55,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... [2018-12-02 17:07:55,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 17:07:55,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 17:07:55,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 17:07:55,882 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 17:07:55,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 17:07:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-02 17:07:55,914 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-02 17:07:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 17:07:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2018-12-02 17:07:55,914 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2018-12-02 17:07:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 17:07:55,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 17:07:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 17:07:55,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 17:07:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 17:07:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 17:07:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 17:07:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 17:07:55,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 17:07:56,068 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 17:07:56,068 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 17:07:56,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:56 BoogieIcfgContainer [2018-12-02 17:07:56,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 17:07:56,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 17:07:56,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 17:07:56,071 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 17:07:56,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:07:55" (1/3) ... [2018-12-02 17:07:56,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bd9a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:07:56, skipping insertion in model container [2018-12-02 17:07:56,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:55" (2/3) ... [2018-12-02 17:07:56,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bd9a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:07:56, skipping insertion in model container [2018-12-02 17:07:56,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:56" (3/3) ... [2018-12-02 17:07:56,073 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy_true-valid-memsafety.i [2018-12-02 17:07:56,079 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 17:07:56,083 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2018-12-02 17:07:56,092 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2018-12-02 17:07:56,105 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 17:07:56,106 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 17:07:56,106 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 17:07:56,106 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 17:07:56,106 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 17:07:56,106 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 17:07:56,106 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 17:07:56,106 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 17:07:56,106 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 17:07:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-12-02 17:07:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 17:07:56,119 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:07:56,120 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 17:07:56,121 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 17:07:56,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:07:56,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1281537684, now seen corresponding path program 1 times [2018-12-02 17:07:56,127 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 17:07:56,127 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 17:07:56,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:56,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:07:56,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:07:56,213 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:56,217 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:56,217 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 17:07:56,638 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 [2018-12-02 17:07:56,650 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 [2018-12-02 17:07:56,651 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:56,655 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 17:07:56,655 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2018-12-02 17:07:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-02 17:07:56,666 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 17:07:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:07:56,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 17:07:56,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 17:07:56,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:07:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:07:56,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:07:56,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:07:56,786 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:56,788 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:07:56,788 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 17:07:57,374 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 [2018-12-02 17:07:57,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:57,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:07:57,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-02 17:07:57,385 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:07:57,391 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 17:07:57,392 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-02 17:07:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-02 17:07:57,410 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 17:07:57,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 17:07:57,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 10 [2018-12-02 17:07:57,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 17:07:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 17:07:57,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=66, Unknown=7, NotChecked=34, Total=132 [2018-12-02 17:07:57,474 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2018-12-02 17:07:58,354 WARN L180 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2018-12-02 17:07:59,261 WARN L180 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-12-02 17:08:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:08:01,426 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-02 17:08:01,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 17:08:01,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-12-02 17:08:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:08:01,432 INFO L225 Difference]: With dead ends: 39 [2018-12-02 17:08:01,432 INFO L226 Difference]: Without dead ends: 33 [2018-12-02 17:08:01,434 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 [2018-12-02 17:08:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-02 17:08:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-02 17:08:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-02 17:08:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-02 17:08:01,455 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 19 [2018-12-02 17:08:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:08:01,456 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-02 17:08:01,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 17:08:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-02 17:08:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 17:08:01,458 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:08:01,458 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 17:08:01,458 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 17:08:01,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:08:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1281537685, now seen corresponding path program 1 times [2018-12-02 17:08:01,458 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 17:08:01,459 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 17:08:01,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:08:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:08:01,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:08:01,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:08:01,512 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:01,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:08:01,520 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:01,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:01,525 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-02 17:08:02,348 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 [2018-12-02 17:08:02,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:08:02,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:08:02,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2018-12-02 17:08:02,359 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:02,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2018-12-02 17:08:02,372 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:02,380 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. [2018-12-02 17:08:02,380 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:18 [2018-12-02 17:08:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-02 17:08:02,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 17:08:02,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 17:08:02,557 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/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 [2018-12-02 17:08:02,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:08:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:08:02,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:08:02,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:08:02,578 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:02,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:08:02,586 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:02,591 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:02,591 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-02 17:08:02,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:08:02,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:08:02,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-12-02 17:08:02,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:02,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2018-12-02 17:08:02,615 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:02,623 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. [2018-12-02 17:08:02,623 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2018-12-02 17:08:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-02 17:08:02,624 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 17:08:02,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 17:08:02,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-02 17:08:02,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 17:08:02,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 17:08:02,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2018-12-02 17:08:02,717 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2018-12-02 17:08:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:08:02,964 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-12-02 17:08:02,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 17:08:02,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-12-02 17:08:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:08:02,965 INFO L225 Difference]: With dead ends: 28 [2018-12-02 17:08:02,966 INFO L226 Difference]: Without dead ends: 28 [2018-12-02 17:08:02,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2018-12-02 17:08:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-02 17:08:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-02 17:08:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-02 17:08:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-12-02 17:08:02,968 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2018-12-02 17:08:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:08:02,969 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-12-02 17:08:02,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 17:08:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-12-02 17:08:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-02 17:08:02,969 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:08:02,969 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] [2018-12-02 17:08:02,970 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 17:08:02,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:08:02,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1934355428, now seen corresponding path program 1 times [2018-12-02 17:08:02,970 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 17:08:02,970 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/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 [2018-12-02 17:08:02,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:08:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:08:03,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:08:03,034 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 [2018-12-02 17:08:03,036 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 [2018-12-02 17:08:03,037 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,038 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,039 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,040 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2018-12-02 17:08:03,058 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 [2018-12-02 17:08:03,060 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 [2018-12-02 17:08:03,060 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,062 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,064 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,064 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:23, output treesize:7 [2018-12-02 17:08:03,066 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 [2018-12-02 17:08:03,068 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 [2018-12-02 17:08:03,068 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,069 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,070 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,070 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-12-02 17:08:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 17:08:03,084 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 17:08:03,086 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 17:08:03,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-02 17:08:03,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 17:08:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 17:08:03,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-02 17:08:03,087 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2018-12-02 17:08:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:08:03,183 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-12-02 17:08:03,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 17:08:03,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-12-02 17:08:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:08:03,184 INFO L225 Difference]: With dead ends: 27 [2018-12-02 17:08:03,184 INFO L226 Difference]: Without dead ends: 27 [2018-12-02 17:08:03,185 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 [2018-12-02 17:08:03,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-02 17:08:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-02 17:08:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 17:08:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-02 17:08:03,187 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 28 [2018-12-02 17:08:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:08:03,187 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-02 17:08:03,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 17:08:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-02 17:08:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 17:08:03,188 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:08:03,188 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] [2018-12-02 17:08:03,188 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 17:08:03,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:08:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash -164523811, now seen corresponding path program 1 times [2018-12-02 17:08:03,189 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 17:08:03,189 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 17:08:03,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:08:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:08:03,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:08:03,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:08:03,252 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,254 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 17:08:03,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:08:03,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:08:03,310 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 [2018-12-02 17:08:03,310 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,316 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,316 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2018-12-02 17:08:03,337 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 [2018-12-02 17:08:03,340 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 [2018-12-02 17:08:03,340 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,342 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,349 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,349 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2018-12-02 17:08:03,404 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 [2018-12-02 17:08:03,407 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 [2018-12-02 17:08:03,407 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,411 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,417 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,417 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:27 [2018-12-02 17:08:03,420 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 [2018-12-02 17:08:03,423 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 [2018-12-02 17:08:03,423 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,427 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,432 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,432 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:19 [2018-12-02 17:08:03,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 17:08:03,490 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 [2018-12-02 17:08:03,491 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:03,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 17:08:03,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:13 [2018-12-02 17:08:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 17:08:03,518 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 17:08:03,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 17:08:03,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-12-02 17:08:03,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 17:08:03,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 17:08:03,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-12-02 17:08:03,520 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-12-02 17:08:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:08:03,963 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-02 17:08:03,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 17:08:03,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-12-02 17:08:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:08:03,965 INFO L225 Difference]: With dead ends: 26 [2018-12-02 17:08:03,965 INFO L226 Difference]: Without dead ends: 26 [2018-12-02 17:08:03,966 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 [2018-12-02 17:08:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-02 17:08:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-02 17:08:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-02 17:08:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-12-02 17:08:03,969 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 29 [2018-12-02 17:08:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:08:03,969 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-12-02 17:08:03,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 17:08:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-12-02 17:08:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-02 17:08:03,970 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 17:08:03,970 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] [2018-12-02 17:08:03,971 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION]=== [2018-12-02 17:08:03,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 17:08:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -805270777, now seen corresponding path program 1 times [2018-12-02 17:08:03,972 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 17:08:03,972 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/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 [2018-12-02 17:08:03,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 17:08:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 17:08:04,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 17:08:04,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-02 17:08:04,055 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,056 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,056 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 17:08:04,199 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 [2018-12-02 17:08:04,201 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 [2018-12-02 17:08:04,201 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,203 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,216 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,216 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:44 [2018-12-02 17:08:04,318 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 [2018-12-02 17:08:04,322 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 [2018-12-02 17:08:04,323 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,334 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,347 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,347 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:44 [2018-12-02 17:08:04,352 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 [2018-12-02 17:08:04,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2018-12-02 17:08:04,357 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,367 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,385 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 17:08:04,385 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:32 [2018-12-02 17:08:25,375 WARN L180 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2018-12-02 17:08:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 17:08:25,378 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 17:08:25,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 17:08:25,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2018-12-02 17:08:25,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-02 17:08:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-02 17:08:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=254, Unknown=10, NotChecked=0, Total=306 [2018-12-02 17:08:25,380 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2018-12-02 17:08:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 17:08:42,076 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-12-02 17:08:42,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-02 17:08:42,077 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2018-12-02 17:08:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 17:08:42,077 INFO L225 Difference]: With dead ends: 25 [2018-12-02 17:08:42,077 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 17:08:42,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=96, Invalid=646, Unknown=14, NotChecked=0, Total=756 [2018-12-02 17:08:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 17:08:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 17:08:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 17:08:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 17:08:42,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2018-12-02 17:08:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 17:08:42,078 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 17:08:42,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-02 17:08:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 17:08:42,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 17:08:42,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:08:42 BoogieIcfgContainer [2018-12-02 17:08:42,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 17:08:42,081 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 17:08:42,081 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 17:08:42,081 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 17:08:42,082 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:56" (3/4) ... [2018-12-02 17:08:42,084 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 17:08:42,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 17:08:42,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2018-12-02 17:08:42,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 17:08:42,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure alloc_node [2018-12-02 17:08:42,091 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-02 17:08:42,091 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-02 17:08:42,091 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 17:08:42,115 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e9faf979-812e-4ee3-856c-97bec8a9a422/bin-2019/utaipan/witness.graphml [2018-12-02 17:08:42,115 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 17:08:42,115 INFO L168 Benchmark]: Toolchain (without parser) took 46540.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 939.3 MB in the beginning and 990.0 MB in the end (delta: -50.7 MB). Peak memory consumption was 155.9 MB. Max. memory is 11.5 GB. [2018-12-02 17:08:42,116 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 17:08:42,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.27 ms. Allocated memory is still 1.0 GB. Free memory was 939.3 MB in the beginning and 916.5 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2018-12-02 17:08:42,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 916.5 MB in the beginning and 1.1 GB in the end (delta: -216.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2018-12-02 17:08:42,116 INFO L168 Benchmark]: Boogie Preprocessor took 16.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 17:08:42,116 INFO L168 Benchmark]: RCFGBuilder took 186.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. [2018-12-02 17:08:42,117 INFO L168 Benchmark]: TraceAbstraction took 46011.84 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 61.3 MB). Free memory was 1.1 GB in the beginning and 997.2 MB in the end (delta: 118.5 MB). Peak memory consumption was 179.9 MB. Max. memory is 11.5 GB. [2018-12-02 17:08:42,117 INFO L168 Benchmark]: Witness Printer took 33.62 ms. Allocated memory is still 1.2 GB. Free memory was 997.2 MB in the beginning and 990.0 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. [2018-12-02 17:08:42,118 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 236.27 ms. Allocated memory is still 1.0 GB. Free memory was 939.3 MB in the beginning and 916.5 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 916.5 MB in the beginning and 1.1 GB in the end (delta: -216.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 186.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 46011.84 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 61.3 MB). Free memory was 1.1 GB in the beginning and 997.2 MB in the end (delta: 118.5 MB). Peak memory consumption was 179.9 MB. Max. memory is 11.5 GB. * Witness Printer took 33.62 ms. Allocated memory is still 1.2 GB. Free memory was 997.2 MB in the beginning and 990.0 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 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: 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: 574]: free always succeeds For all program executions holds that free 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: 572]: 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: 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: 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, 45.9s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 21.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 76 SDtfs, 96 SDslu, 334 SDs, 0 SdLazy, 744 SolverSat, 48 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 30.4s 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, 24.0s 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...