./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_false-valid-memtrack.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_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_false-valid-memtrack.i -s /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 cf7af2f20e563d03f4a81a8dac054ded849cb34c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_false-valid-memtrack.i -s /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 cf7af2f20e563d03f4a81a8dac054ded849cb34c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 20:52:19,251 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 20:52:19,252 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 20:52:19,258 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 20:52:19,258 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 20:52:19,259 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 20:52:19,259 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 20:52:19,260 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 20:52:19,261 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 20:52:19,261 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 20:52:19,261 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 20:52:19,262 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 20:52:19,262 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 20:52:19,262 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 20:52:19,263 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 20:52:19,263 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 20:52:19,264 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 20:52:19,264 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 20:52:19,265 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 20:52:19,266 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 20:52:19,266 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 20:52:19,267 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 20:52:19,268 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 20:52:19,268 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 20:52:19,268 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 20:52:19,269 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 20:52:19,269 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 20:52:19,270 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 20:52:19,270 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 20:52:19,270 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 20:52:19,270 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 20:52:19,271 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 20:52:19,271 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 20:52:19,271 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 20:52:19,271 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 20:52:19,272 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 20:52:19,272 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-02 20:52:19,279 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 20:52:19,279 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 20:52:19,280 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 20:52:19,280 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 20:52:19,280 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 20:52:19,280 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 20:52:19,280 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 20:52:19,280 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 20:52:19,280 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 20:52:19,280 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 20:52:19,280 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 20:52:19,281 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 20:52:19,281 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 20:52:19,281 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 20:52:19,281 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 20:52:19,281 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 20:52:19,281 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 20:52:19,281 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 20:52:19,282 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 20:52:19,282 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 20:52:19,283 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 20:52:19,283 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 20:52:19,283 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 20:52:19,283 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 20:52:19,283 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 20:52:19,283 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 20:52:19,283 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 20:52:19,283 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_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 -> cf7af2f20e563d03f4a81a8dac054ded849cb34c [2018-12-02 20:52:19,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 20:52:19,307 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 20:52:19,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 20:52:19,310 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 20:52:19,311 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 20:52:19,311 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_false-valid-memtrack.i [2018-12-02 20:52:19,347 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data/885340416/6d32268c98f349caa8778b03965d99bb/FLAG6f13bba46 [2018-12-02 20:52:19,815 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 20:52:19,815 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_false-valid-memtrack.i [2018-12-02 20:52:19,823 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data/885340416/6d32268c98f349caa8778b03965d99bb/FLAG6f13bba46 [2018-12-02 20:52:19,831 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data/885340416/6d32268c98f349caa8778b03965d99bb [2018-12-02 20:52:19,833 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 20:52:19,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 20:52:19,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 20:52:19,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 20:52:19,837 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 20:52:19,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:52:19" (1/1) ... [2018-12-02 20:52:19,839 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 08:52:19, skipping insertion in model container [2018-12-02 20:52:19,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:52:19" (1/1) ... [2018-12-02 20:52:19,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 20:52:19,864 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 20:52:20,004 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 20:52:20,009 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 20:52:20,066 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 20:52:20,086 INFO L195 MainTranslator]: Completed translation [2018-12-02 20:52:20,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20 WrapperNode [2018-12-02 20:52:20,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 20:52:20,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 20:52:20,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 20:52:20,087 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 20:52:20,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 20:52:20,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 20:52:20,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 20:52:20,104 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 20:52:20,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... [2018-12-02 20:52:20,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 20:52:20,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 20:52:20,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 20:52:20,118 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 20:52:20,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-02 20:52:20,150 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-02 20:52:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 20:52:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2018-12-02 20:52:20,151 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2018-12-02 20:52:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 20:52:20,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 20:52:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 20:52:20,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 20:52:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 20:52:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 20:52:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 20:52:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 20:52:20,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 20:52:20,275 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 20:52:20,275 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 20:52:20,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:52:20 BoogieIcfgContainer [2018-12-02 20:52:20,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 20:52:20,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 20:52:20,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 20:52:20,279 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 20:52:20,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:52:19" (1/3) ... [2018-12-02 20:52:20,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273598d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:52:20, skipping insertion in model container [2018-12-02 20:52:20,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:20" (2/3) ... [2018-12-02 20:52:20,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273598d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:52:20, skipping insertion in model container [2018-12-02 20:52:20,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:52:20" (3/3) ... [2018-12-02 20:52:20,281 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy_false-valid-memtrack.i [2018-12-02 20:52:20,287 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 20:52:20,291 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2018-12-02 20:52:20,299 INFO L257 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2018-12-02 20:52:20,314 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 20:52:20,314 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 20:52:20,314 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 20:52:20,314 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 20:52:20,314 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 20:52:20,314 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 20:52:20,314 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 20:52:20,314 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 20:52:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-02 20:52:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 20:52:20,328 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:20,329 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:52:20,330 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:20,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1107495215, now seen corresponding path program 1 times [2018-12-02 20:52:20,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 20:52:20,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:20,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:20,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:20,366 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 20:52:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:20,517 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 20:52:20,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 20:52:20,518 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 20:52:20,519 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-02 20:52:20,521 INFO L205 CegarAbsIntRunner]: [0], [1], [11], [14], [33], [39], [41], [42], [43], [44], [45], [47], [48], [49], [50] [2018-12-02 20:52:20,542 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 20:52:20,543 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 20:52:20,617 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 20:52:20,618 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 20:52:20,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:20,627 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 20:52:20,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 20:52:20,627 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:20,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:20,634 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 20:52:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:20,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 20:52:20,684 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 20:52:20,685 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:20,686 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:20,687 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 20:52:20,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:20,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:20,718 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 20:52:20,719 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:20,725 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 20:52:20,726 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-02 20:52:20,743 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 20:52:20,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 20:52:22,991 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 20:52:23,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 20:52:23,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2018-12-02 20:52:23,008 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 20:52:23,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 20:52:23,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 20:52:23,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=196, Unknown=2, NotChecked=0, Total=240 [2018-12-02 20:52:23,018 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 10 states. [2018-12-02 20:52:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:52:23,186 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-12-02 20:52:23,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 20:52:23,187 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-12-02 20:52:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 20:52:23,192 INFO L225 Difference]: With dead ends: 35 [2018-12-02 20:52:23,192 INFO L226 Difference]: Without dead ends: 29 [2018-12-02 20:52:23,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=77, Invalid=301, Unknown=2, NotChecked=0, Total=380 [2018-12-02 20:52:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-02 20:52:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-02 20:52:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-02 20:52:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-12-02 20:52:23,218 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2018-12-02 20:52:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 20:52:23,219 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-12-02 20:52:23,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 20:52:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-12-02 20:52:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 20:52:23,220 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:23,220 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:52:23,220 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:23,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1107495216, now seen corresponding path program 1 times [2018-12-02 20:52:23,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 20:52:23,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:23,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:23,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:23,222 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 20:52:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:23,303 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 20:52:23,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 20:52:23,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 20:52:23,304 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-02 20:52:23,304 INFO L205 CegarAbsIntRunner]: [0], [1], [11], [15], [33], [39], [41], [42], [43], [44], [45], [47], [48], [49], [50] [2018-12-02 20:52:23,304 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 20:52:23,305 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 20:52:23,322 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 20:52:23,322 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 20:52:23,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:23,324 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 20:52:23,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 20:52:23,324 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:23,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:23,331 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 20:52:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:23,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 20:52:23,350 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 20:52:23,350 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:23,355 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 20:52:23,355 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:23,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:23,366 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-02 20:52:23,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:23,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:23,476 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 20:52:23,476 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:23,482 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 20:52:23,482 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:23,486 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 20:52:23,487 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2018-12-02 20:52:23,500 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 20:52:23,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 20:52:23,565 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2018-12-02 20:52:25,663 WARN L180 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2018-12-02 20:52:25,847 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 20:52:25,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 20:52:25,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2018-12-02 20:52:25,862 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 20:52:25,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 20:52:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 20:52:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2018-12-02 20:52:25,863 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-12-02 20:52:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:52:26,470 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-12-02 20:52:26,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 20:52:26,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2018-12-02 20:52:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 20:52:26,471 INFO L225 Difference]: With dead ends: 25 [2018-12-02 20:52:26,471 INFO L226 Difference]: Without dead ends: 25 [2018-12-02 20:52:26,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2018-12-02 20:52:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-02 20:52:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-02 20:52:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-02 20:52:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-12-02 20:52:26,474 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 19 [2018-12-02 20:52:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 20:52:26,474 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-12-02 20:52:26,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 20:52:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-12-02 20:52:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 20:52:26,475 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:26,475 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:52:26,475 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:26,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:26,475 INFO L82 PathProgramCache]: Analyzing trace with hash -548831674, now seen corresponding path program 1 times [2018-12-02 20:52:26,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 20:52:26,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:26,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:26,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:26,476 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 20:52:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:26,512 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 20:52:26,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 20:52:26,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 20:52:26,513 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 20:52:26,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 20:52:26,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 20:52:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 20:52:26,513 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 7 states. [2018-12-02 20:52:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:52:26,558 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-12-02 20:52:26,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 20:52:26,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-12-02 20:52:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 20:52:26,559 INFO L225 Difference]: With dead ends: 24 [2018-12-02 20:52:26,559 INFO L226 Difference]: Without dead ends: 24 [2018-12-02 20:52:26,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-12-02 20:52:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-02 20:52:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-02 20:52:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-02 20:52:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-12-02 20:52:26,561 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-12-02 20:52:26,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 20:52:26,561 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-12-02 20:52:26,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 20:52:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-12-02 20:52:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 20:52:26,562 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:26,562 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:52:26,562 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:26,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash -548831673, now seen corresponding path program 1 times [2018-12-02 20:52:26,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 20:52:26,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:26,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:26,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:26,563 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 20:52:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:26,626 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 20:52:26,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 20:52:26,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 20:52:26,627 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 20:52:26,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 20:52:26,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 20:52:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 20:52:26,627 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2018-12-02 20:52:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:52:26,676 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-02 20:52:26,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 20:52:26,677 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-12-02 20:52:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 20:52:26,677 INFO L225 Difference]: With dead ends: 23 [2018-12-02 20:52:26,678 INFO L226 Difference]: Without dead ends: 23 [2018-12-02 20:52:26,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-12-02 20:52:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-02 20:52:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-02 20:52:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 20:52:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-12-02 20:52:26,681 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22 [2018-12-02 20:52:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 20:52:26,681 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-12-02 20:52:26,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 20:52:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-12-02 20:52:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 20:52:26,682 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:26,682 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] [2018-12-02 20:52:26,682 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:26,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:26,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1073479690, now seen corresponding path program 1 times [2018-12-02 20:52:26,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 20:52:26,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:26,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:26,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:52:26,683 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 20:52:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:52:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:52:26,711 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 20:52:26,719 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-02 20:52:26,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 08:52:26 BoogieIcfgContainer [2018-12-02 20:52:26,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 20:52:26,728 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 20:52:26,728 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 20:52:26,728 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 20:52:26,728 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:52:20" (3/4) ... [2018-12-02 20:52:26,731 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 20:52:26,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 20:52:26,731 INFO L168 Benchmark]: Toolchain (without parser) took 6897.83 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 948.1 MB in the beginning and 1.0 GB in the end (delta: -70.7 MB). Peak memory consumption was 41.5 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:26,732 INFO L168 Benchmark]: CDTParser took 0.13 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 20:52:26,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.82 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:26,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:26,733 INFO L168 Benchmark]: Boogie Preprocessor took 13.96 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 20:52:26,733 INFO L168 Benchmark]: RCFGBuilder took 158.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:26,733 INFO L168 Benchmark]: TraceAbstraction took 6451.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:26,734 INFO L168 Benchmark]: Witness Printer took 2.92 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 20:52:26,736 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 251.82 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.96 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6451.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 11.5 GB. * Witness Printer took 2.92 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 568]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 568. Possible FailurePath: [L569] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); VAL [malloc(sizeof(struct node))={10:0}, temp={10:0}] [L563] COND FALSE !(((void *)0) == temp) VAL [malloc(sizeof(struct node))={10:0}, temp={10:0}] [L566] return temp; VAL [\result={10:0}, malloc(sizeof(struct node))={10:0}, temp={10:0}] [L569] RET, EXPR alloc_node() VAL [alloc_node()={10:0}] [L569] struct node* s = alloc_node(); [L570] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); VAL [malloc(sizeof(struct node))={7:0}, temp={7:0}] [L563] COND FALSE !(((void *)0) == temp) VAL [malloc(sizeof(struct node))={7:0}, temp={7:0}] [L566] return temp; VAL [\result={7:0}, malloc(sizeof(struct node))={7:0}, temp={7:0}] [L570] RET, EXPR alloc_node() VAL [alloc_node()={7:0}, s={10:0}] [L570] s->next = alloc_node() VAL [alloc_node()={7:0}, s={10:0}] [L571] EXPR s->next VAL [s={10:0}, s->next={7:0}] [L571] *s = *(s->next) [L572] free(s) VAL [s={10:0}] [L572] free(s) [L573] return 0; VAL [\result=0, s={10:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 11 error locations. UNSAFE Result, 6.4s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 55 SDslu, 211 SDs, 0 SdLazy, 436 SolverSat, 27 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 150 ConstructedInterpolants, 32 QuantifiedInterpolants, 24408 SizeOfPredicates, 11 NumberOfNonLiveVariables, 172 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 16/40 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-02 20:52:28,046 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 20:52:28,047 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 20:52:28,053 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 20:52:28,053 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 20:52:28,054 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 20:52:28,054 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 20:52:28,055 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 20:52:28,056 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 20:52:28,057 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 20:52:28,058 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 20:52:28,058 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 20:52:28,058 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 20:52:28,059 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 20:52:28,060 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 20:52:28,060 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 20:52:28,061 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 20:52:28,062 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 20:52:28,063 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 20:52:28,064 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 20:52:28,064 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 20:52:28,065 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 20:52:28,066 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 20:52:28,066 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 20:52:28,066 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 20:52:28,066 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 20:52:28,067 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 20:52:28,067 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 20:52:28,067 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 20:52:28,068 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 20:52:28,068 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 20:52:28,068 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 20:52:28,069 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 20:52:28,069 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 20:52:28,069 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 20:52:28,069 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 20:52:28,070 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-02 20:52:28,079 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 20:52:28,079 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 20:52:28,080 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 20:52:28,080 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 20:52:28,080 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 20:52:28,080 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 20:52:28,080 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 20:52:28,080 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 20:52:28,081 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 20:52:28,081 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 20:52:28,081 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 20:52:28,081 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 20:52:28,082 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 20:52:28,082 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 20:52:28,082 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 20:52:28,082 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 20:52:28,082 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 20:52:28,082 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 20:52:28,083 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 20:52:28,083 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 20:52:28,083 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 20:52:28,083 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 20:52:28,083 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 20:52:28,083 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 20:52:28,084 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 20:52:28,084 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 20:52:28,084 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 20:52:28,084 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 20:52:28,084 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 20:52:28,084 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 20:52:28,084 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 20:52:28,085 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 20:52:28,085 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 20:52:28,085 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 20:52:28,085 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 20:52:28,085 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 20:52:28,085 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_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 -> cf7af2f20e563d03f4a81a8dac054ded849cb34c [2018-12-02 20:52:28,110 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 20:52:28,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 20:52:28,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 20:52:28,123 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 20:52:28,123 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 20:52:28,124 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_false-valid-memtrack.i [2018-12-02 20:52:28,163 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data/a93a89b77/e4ee26295586445493b3cbee66709142/FLAGe05c6cd01 [2018-12-02 20:52:28,510 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 20:52:28,511 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy_false-valid-memtrack.i [2018-12-02 20:52:28,517 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data/a93a89b77/e4ee26295586445493b3cbee66709142/FLAGe05c6cd01 [2018-12-02 20:52:28,525 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/bin-2019/utaipan/data/a93a89b77/e4ee26295586445493b3cbee66709142 [2018-12-02 20:52:28,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 20:52:28,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 20:52:28,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 20:52:28,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 20:52:28,530 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 20:52:28,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad88c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28, skipping insertion in model container [2018-12-02 20:52:28,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 20:52:28,554 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 20:52:28,702 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 20:52:28,708 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 20:52:28,731 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 20:52:28,754 INFO L195 MainTranslator]: Completed translation [2018-12-02 20:52:28,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28 WrapperNode [2018-12-02 20:52:28,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 20:52:28,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 20:52:28,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 20:52:28,755 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 20:52:28,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 20:52:28,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 20:52:28,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 20:52:28,807 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 20:52:28,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... [2018-12-02 20:52:28,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 20:52:28,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 20:52:28,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 20:52:28,826 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 20:52:28,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-02 20:52:28,856 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-02 20:52:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 20:52:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2018-12-02 20:52:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2018-12-02 20:52:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 20:52:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 20:52:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 20:52:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 20:52:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 20:52:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 20:52:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 20:52:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 20:52:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 20:52:29,000 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 20:52:29,001 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 20:52:29,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:52:29 BoogieIcfgContainer [2018-12-02 20:52:29,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 20:52:29,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 20:52:29,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 20:52:29,003 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 20:52:29,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:52:28" (1/3) ... [2018-12-02 20:52:29,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532b1e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:52:29, skipping insertion in model container [2018-12-02 20:52:29,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:52:28" (2/3) ... [2018-12-02 20:52:29,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532b1e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:52:29, skipping insertion in model container [2018-12-02 20:52:29,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:52:29" (3/3) ... [2018-12-02 20:52:29,005 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy_false-valid-memtrack.i [2018-12-02 20:52:29,011 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 20:52:29,015 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2018-12-02 20:52:29,025 INFO L257 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2018-12-02 20:52:29,038 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 20:52:29,039 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 20:52:29,039 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 20:52:29,039 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 20:52:29,039 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 20:52:29,039 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 20:52:29,039 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 20:52:29,039 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 20:52:29,039 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 20:52:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-02 20:52:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 20:52:29,053 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:29,053 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:52:29,054 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:29,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:29,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1107495215, now seen corresponding path program 1 times [2018-12-02 20:52:29,060 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 20:52:29,060 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:29,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:29,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 20:52:29,150 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 20:52:29,151 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:29,155 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:29,155 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 20:52:30,581 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 20:52:30,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:30,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:30,593 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 20:52:30,593 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:30,600 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 20:52:30,601 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:17 [2018-12-02 20:52:30,621 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 20:52:30,622 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 20:52:30,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 20:52:30,672 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:30,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:30,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 20:52:30,695 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 20:52:30,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:30,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:30,697 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 20:52:30,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:30,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:30,717 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 20:52:30,718 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:30,727 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 20:52:30,727 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:17 [2018-12-02 20:52:30,728 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 20:52:30,729 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 20:52:30,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 20:52:30,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-02 20:52:30,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 20:52:30,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 20:52:30,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=55, Unknown=1, NotChecked=14, Total=90 [2018-12-02 20:52:30,789 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 9 states. [2018-12-02 20:52:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:52:31,002 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-12-02 20:52:31,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 20:52:31,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-12-02 20:52:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 20:52:31,011 INFO L225 Difference]: With dead ends: 35 [2018-12-02 20:52:31,011 INFO L226 Difference]: Without dead ends: 29 [2018-12-02 20:52:31,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=28, Invalid=85, Unknown=1, NotChecked=18, Total=132 [2018-12-02 20:52:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-02 20:52:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-02 20:52:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-02 20:52:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-12-02 20:52:31,037 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2018-12-02 20:52:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 20:52:31,038 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-12-02 20:52:31,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 20:52:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-12-02 20:52:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 20:52:31,039 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:31,039 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:52:31,039 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:31,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:31,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1107495216, now seen corresponding path program 1 times [2018-12-02 20:52:31,039 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 20:52:31,040 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:31,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:31,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 20:52:31,097 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 20:52:31,097 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:31,104 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 20:52:31,104 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:31,109 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:31,110 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-02 20:52:31,834 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 20:52:31,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:31,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:31,849 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 20:52:31,849 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:31,861 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 20:52:31,861 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:31,870 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 20:52:31,870 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2018-12-02 20:52:31,897 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 20:52:31,897 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 20:52:32,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 20:52:32,038 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:32,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:32,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 20:52:32,062 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 20:52:32,063 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,074 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 20:52:32,075 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,081 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,081 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-02 20:52:32,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:32,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 20:52:32,100 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 20:52:32,101 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,114 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 20:52:32,115 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,123 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 20:52:32,123 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:18 [2018-12-02 20:52:32,125 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 20:52:32,126 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 20:52:32,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 20:52:32,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-02 20:52:32,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 20:52:32,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 20:52:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2018-12-02 20:52:32,226 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 9 states. [2018-12-02 20:52:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:52:32,488 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-12-02 20:52:32,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 20:52:32,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-12-02 20:52:32,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 20:52:32,489 INFO L225 Difference]: With dead ends: 25 [2018-12-02 20:52:32,489 INFO L226 Difference]: Without dead ends: 25 [2018-12-02 20:52:32,490 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2018-12-02 20:52:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-02 20:52:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-02 20:52:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-02 20:52:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-12-02 20:52:32,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 19 [2018-12-02 20:52:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 20:52:32,492 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-12-02 20:52:32,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 20:52:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-12-02 20:52:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 20:52:32,493 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:32,493 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:52:32,493 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:32,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:32,493 INFO L82 PathProgramCache]: Analyzing trace with hash -548831674, now seen corresponding path program 1 times [2018-12-02 20:52:32,494 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 20:52:32,494 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:32,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:32,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 20:52:32,541 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 20:52:32,541 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,543 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,543 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 20:52:32,559 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 20:52:32,561 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 20:52:32,561 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,563 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,568 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 20:52:32,568 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:11 [2018-12-02 20:52:32,578 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 19 treesize of output 15 [2018-12-02 20:52:32,580 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 15 treesize of output 7 [2018-12-02 20:52:32,580 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,582 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,586 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 20:52:32,586 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:13 [2018-12-02 20:52:32,600 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 20:52:32,601 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 20:52:32,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 20:52:32,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 20:52:32,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 20:52:32,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 20:52:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 20:52:32,603 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 7 states. [2018-12-02 20:52:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:52:32,707 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-12-02 20:52:32,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 20:52:32,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-12-02 20:52:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 20:52:32,708 INFO L225 Difference]: With dead ends: 24 [2018-12-02 20:52:32,708 INFO L226 Difference]: Without dead ends: 24 [2018-12-02 20:52:32,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-12-02 20:52:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-02 20:52:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-02 20:52:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-02 20:52:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-12-02 20:52:32,710 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-12-02 20:52:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 20:52:32,710 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-12-02 20:52:32,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 20:52:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-12-02 20:52:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 20:52:32,711 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:32,711 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:52:32,711 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:32,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:32,711 INFO L82 PathProgramCache]: Analyzing trace with hash -548831673, now seen corresponding path program 1 times [2018-12-02 20:52:32,711 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 20:52:32,711 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:32,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:52:32,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 20:52:32,762 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 20:52:32,762 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,765 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,765 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-02 20:52:32,787 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 20:52:32,789 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 20:52:32,789 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,792 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,805 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 20:52:32,807 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 20:52:32,807 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,809 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,814 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,815 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:28, output treesize:17 [2018-12-02 20:52:32,828 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 20:52:32,830 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 20:52:32,830 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,832 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,840 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 17 treesize of output 13 [2018-12-02 20:52:32,842 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 13 treesize of output 5 [2018-12-02 20:52:32,842 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,843 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,846 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-02 20:52:32,846 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:31, output treesize:9 [2018-12-02 20:52:32,857 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 20:52:32,857 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 20:52:32,859 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 20:52:32,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 20:52:32,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 20:52:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 20:52:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 20:52:32,860 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2018-12-02 20:52:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:52:32,964 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-02 20:52:32,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 20:52:32,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-12-02 20:52:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 20:52:32,965 INFO L225 Difference]: With dead ends: 23 [2018-12-02 20:52:32,965 INFO L226 Difference]: Without dead ends: 23 [2018-12-02 20:52:32,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-12-02 20:52:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-02 20:52:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-02 20:52:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 20:52:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-12-02 20:52:32,967 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22 [2018-12-02 20:52:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 20:52:32,967 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-12-02 20:52:32,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 20:52:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-12-02 20:52:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 20:52:32,968 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 20:52:32,968 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] [2018-12-02 20:52:32,968 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION]=== [2018-12-02 20:52:32,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:52:32,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1073479690, now seen corresponding path program 1 times [2018-12-02 20:52:32,968 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 20:52:32,968 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2ff53c-1e10-4f6c-85ef-52194e232640/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 20:52:32,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:52:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:52:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:52:33,092 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 20:52:33,101 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-02 20:52:33,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 08:52:33 BoogieIcfgContainer [2018-12-02 20:52:33,111 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 20:52:33,111 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 20:52:33,111 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 20:52:33,112 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 20:52:33,112 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:52:29" (3/4) ... [2018-12-02 20:52:33,114 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 20:52:33,114 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 20:52:33,115 INFO L168 Benchmark]: Toolchain (without parser) took 4587.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 938.0 MB in the beginning and 822.2 MB in the end (delta: 115.8 MB). Peak memory consumption was 250.0 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:33,116 INFO L168 Benchmark]: CDTParser took 0.13 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 20:52:33,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.42 ms. Allocated memory is still 1.0 GB. Free memory was 938.0 MB in the beginning and 916.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:33,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 916.5 MB in the beginning and 1.1 GB in the end (delta: -205.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:33,116 INFO L168 Benchmark]: Boogie Preprocessor took 18.56 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 20:52:33,117 INFO L168 Benchmark]: RCFGBuilder took 175.32 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: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:33,117 INFO L168 Benchmark]: TraceAbstraction took 4109.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 822.2 MB in the end (delta: 281.4 MB). Peak memory consumption was 281.4 MB. Max. memory is 11.5 GB. [2018-12-02 20:52:33,117 INFO L168 Benchmark]: Witness Printer took 2.94 ms. Allocated memory is still 1.2 GB. Free memory is still 822.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 20:52:33,119 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 226.42 ms. Allocated memory is still 1.0 GB. Free memory was 938.0 MB in the beginning and 916.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 916.5 MB in the beginning and 1.1 GB in the end (delta: -205.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.56 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 175.32 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: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4109.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 822.2 MB in the end (delta: 281.4 MB). Peak memory consumption was 281.4 MB. Max. memory is 11.5 GB. * Witness Printer took 2.94 ms. Allocated memory is still 1.2 GB. Free memory is still 822.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 568]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 568. Possible FailurePath: [L569] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); VAL [malloc(sizeof(struct node))={2147483647:0}, temp={2147483647:0}] [L563] COND FALSE !(((void *)0) == temp) VAL [malloc(sizeof(struct node))={2147483647:0}, temp={2147483647:0}] [L566] return temp; VAL [\result={2147483647:0}, malloc(sizeof(struct node))={2147483647:0}, temp={2147483647:0}] [L569] RET, EXPR alloc_node() VAL [alloc_node()={2147483647:0}] [L569] struct node* s = alloc_node(); [L570] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); VAL [malloc(sizeof(struct node))={-2147483648:0}, temp={-2147483648:0}] [L563] COND FALSE !(((void *)0) == temp) VAL [malloc(sizeof(struct node))={-2147483648:0}, temp={-2147483648:0}] [L566] return temp; VAL [\result={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, temp={-2147483648:0}] [L570] RET, EXPR alloc_node() VAL [alloc_node()={-2147483648:0}, s={2147483647:0}] [L570] s->next = alloc_node() VAL [alloc_node()={-2147483648:0}, s={2147483647:0}] [L571] EXPR s->next VAL [s={2147483647:0}, s->next={-2147483648:0}] [L571] *s = *(s->next) VAL [*s = *(s->next)={0:0}, s={2147483647:0}, s->next={-2147483648:0}] [L572] free(s) VAL [s={2147483647:0}] [L572] free(s) [L573] return 0; VAL [\result=0, s={2147483647:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 11 error locations. UNSAFE Result, 4.0s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 65 SDslu, 189 SDs, 0 SdLazy, 326 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 20 QuantifiedInterpolants, 14976 SizeOfPredicates, 32 NumberOfNonLiveVariables, 398 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 14/30 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...