./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_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_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 a16cd99b349cc6bdff463f25bc1978dcd091a75b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 a16cd99b349cc6bdff463f25bc1978dcd091a75b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 01:54:43,201 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 01:54:43,202 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 01:54:43,211 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 01:54:43,211 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 01:54:43,211 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 01:54:43,212 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 01:54:43,214 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 01:54:43,215 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 01:54:43,215 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 01:54:43,216 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 01:54:43,216 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 01:54:43,217 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 01:54:43,218 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 01:54:43,219 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 01:54:43,219 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 01:54:43,220 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 01:54:43,221 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 01:54:43,222 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 01:54:43,224 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 01:54:43,224 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 01:54:43,225 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 01:54:43,227 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 01:54:43,227 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 01:54:43,227 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 01:54:43,228 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 01:54:43,229 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 01:54:43,229 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 01:54:43,230 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 01:54:43,231 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 01:54:43,231 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 01:54:43,231 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 01:54:43,231 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 01:54:43,232 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 01:54:43,232 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 01:54:43,232 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 01:54:43,233 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-02 01:54:43,243 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 01:54:43,243 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 01:54:43,244 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 01:54:43,244 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 01:54:43,244 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 01:54:43,244 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 01:54:43,244 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 01:54:43,244 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 01:54:43,245 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 01:54:43,245 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 01:54:43,245 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 01:54:43,245 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 01:54:43,245 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 01:54:43,245 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 01:54:43,246 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 01:54:43,246 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 01:54:43,246 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 01:54:43,246 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 01:54:43,246 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 01:54:43,246 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 01:54:43,246 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 01:54:43,247 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 01:54:43,247 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 01:54:43,247 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 01:54:43,247 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 01:54:43,247 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 01:54:43,247 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 01:54:43,247 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 01:54:43,247 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 01:54:43,248 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 01:54:43,248 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 01:54:43,248 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 01:54:43,248 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 01:54:43,248 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 01:54:43,248 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 01:54:43,248 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 01:54:43,248 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_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 -> a16cd99b349cc6bdff463f25bc1978dcd091a75b [2018-12-02 01:54:43,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 01:54:43,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 01:54:43,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 01:54:43,283 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 01:54:43,283 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 01:54:43,283 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-02 01:54:43,320 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data/fb0a07322/b6377758f53c44509d3d8c451ec72cd6/FLAG1e58930c7 [2018-12-02 01:54:43,707 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 01:54:43,707 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-02 01:54:43,713 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data/fb0a07322/b6377758f53c44509d3d8c451ec72cd6/FLAG1e58930c7 [2018-12-02 01:54:44,055 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data/fb0a07322/b6377758f53c44509d3d8c451ec72cd6 [2018-12-02 01:54:44,057 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 01:54:44,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 01:54:44,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 01:54:44,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 01:54:44,062 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 01:54:44,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7300e139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44, skipping insertion in model container [2018-12-02 01:54:44,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 01:54:44,094 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 01:54:44,243 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:54:44,249 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 01:54:44,304 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:54:44,325 INFO L195 MainTranslator]: Completed translation [2018-12-02 01:54:44,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44 WrapperNode [2018-12-02 01:54:44,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 01:54:44,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 01:54:44,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 01:54:44,326 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 01:54:44,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 01:54:44,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 01:54:44,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 01:54:44,344 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 01:54:44,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... [2018-12-02 01:54:44,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 01:54:44,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 01:54:44,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 01:54:44,360 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 01:54:44,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 01:54:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-02 01:54:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-02 01:54:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 01:54:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-02 01:54:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 01:54:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 01:54:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 01:54:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 01:54:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 01:54:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 01:54:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 01:54:44,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 01:54:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 01:54:44,532 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 01:54:44,533 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-02 01:54:44,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:54:44 BoogieIcfgContainer [2018-12-02 01:54:44,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 01:54:44,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 01:54:44,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 01:54:44,536 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 01:54:44,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:54:44" (1/3) ... [2018-12-02 01:54:44,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b7d182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:54:44, skipping insertion in model container [2018-12-02 01:54:44,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:44" (2/3) ... [2018-12-02 01:54:44,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b7d182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:54:44, skipping insertion in model container [2018-12-02 01:54:44,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:54:44" (3/3) ... [2018-12-02 01:54:44,539 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-02 01:54:44,545 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 01:54:44,550 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-02 01:54:44,560 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-02 01:54:44,582 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 01:54:44,582 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 01:54:44,582 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 01:54:44,582 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 01:54:44,582 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 01:54:44,582 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 01:54:44,582 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 01:54:44,582 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 01:54:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-12-02 01:54:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-02 01:54:44,597 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:44,598 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:44,599 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:44,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:44,603 INFO L82 PathProgramCache]: Analyzing trace with hash -655600941, now seen corresponding path program 1 times [2018-12-02 01:54:44,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:44,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:44,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,634 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:44,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:44,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 01:54:44,675 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:54:44,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 01:54:44,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 01:54:44,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 01:54:44,687 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2018-12-02 01:54:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:44,696 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-12-02 01:54:44,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 01:54:44,697 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-12-02 01:54:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:44,702 INFO L225 Difference]: With dead ends: 34 [2018-12-02 01:54:44,702 INFO L226 Difference]: Without dead ends: 27 [2018-12-02 01:54:44,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 01:54:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-02 01:54:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-02 01:54:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 01:54:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-02 01:54:44,723 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2018-12-02 01:54:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:44,724 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-02 01:54:44,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 01:54:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-02 01:54:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 01:54:44,724 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:44,725 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:44,725 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:44,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1150557056, now seen corresponding path program 1 times [2018-12-02 01:54:44,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:44,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:44,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,726 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:44,753 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:44,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 01:54:44,753 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:54:44,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 01:54:44,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 01:54:44,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:44,755 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2018-12-02 01:54:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:44,790 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-12-02 01:54:44,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 01:54:44,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 01:54:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:44,791 INFO L225 Difference]: With dead ends: 39 [2018-12-02 01:54:44,791 INFO L226 Difference]: Without dead ends: 38 [2018-12-02 01:54:44,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-02 01:54:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-02 01:54:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-02 01:54:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-12-02 01:54:44,794 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 10 [2018-12-02 01:54:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:44,794 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-12-02 01:54:44,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 01:54:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-12-02 01:54:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 01:54:44,795 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:44,795 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:44,795 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:44,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1150557101, now seen corresponding path program 1 times [2018-12-02 01:54:44,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:44,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:44,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,796 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:44,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:44,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 01:54:44,822 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:54:44,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 01:54:44,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 01:54:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:44,823 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 3 states. [2018-12-02 01:54:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:44,837 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2018-12-02 01:54:44,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 01:54:44,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 01:54:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:44,838 INFO L225 Difference]: With dead ends: 38 [2018-12-02 01:54:44,838 INFO L226 Difference]: Without dead ends: 37 [2018-12-02 01:54:44,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-02 01:54:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2018-12-02 01:54:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-02 01:54:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-02 01:54:44,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2018-12-02 01:54:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:44,841 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-02 01:54:44,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 01:54:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-02 01:54:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 01:54:44,841 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:44,841 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:44,841 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:44,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:44,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1150558415, now seen corresponding path program 1 times [2018-12-02 01:54:44,841 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:44,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:44,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,842 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:44,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:44,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 01:54:44,861 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:54:44,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 01:54:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 01:54:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:44,862 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 3 states. [2018-12-02 01:54:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:44,879 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-02 01:54:44,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 01:54:44,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 01:54:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:44,880 INFO L225 Difference]: With dead ends: 27 [2018-12-02 01:54:44,880 INFO L226 Difference]: Without dead ends: 27 [2018-12-02 01:54:44,880 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-02 01:54:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-02 01:54:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 01:54:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-02 01:54:44,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2018-12-02 01:54:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:44,882 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-02 01:54:44,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 01:54:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-02 01:54:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 01:54:44,882 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:44,882 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:44,882 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:44,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1150558416, now seen corresponding path program 1 times [2018-12-02 01:54:44,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:44,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:44,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,883 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:44,913 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:44,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 01:54:44,913 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:54:44,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 01:54:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 01:54:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:44,913 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2018-12-02 01:54:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:44,925 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-02 01:54:44,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 01:54:44,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 01:54:44,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:44,925 INFO L225 Difference]: With dead ends: 25 [2018-12-02 01:54:44,926 INFO L226 Difference]: Without dead ends: 25 [2018-12-02 01:54:44,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-02 01:54:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-02 01:54:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-02 01:54:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-02 01:54:44,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2018-12-02 01:54:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:44,927 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-02 01:54:44,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 01:54:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-02 01:54:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-02 01:54:44,928 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:44,928 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:44,928 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:44,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:44,928 INFO L82 PathProgramCache]: Analyzing trace with hash 353125194, now seen corresponding path program 1 times [2018-12-02 01:54:44,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:44,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:44,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,929 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:44,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:44,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 01:54:44,954 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:54:44,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 01:54:44,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 01:54:44,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 01:54:44,954 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2018-12-02 01:54:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:44,984 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2018-12-02 01:54:44,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 01:54:44,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-12-02 01:54:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:44,985 INFO L225 Difference]: With dead ends: 38 [2018-12-02 01:54:44,985 INFO L226 Difference]: Without dead ends: 38 [2018-12-02 01:54:44,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:54:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-02 01:54:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2018-12-02 01:54:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-02 01:54:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-02 01:54:44,987 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2018-12-02 01:54:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:44,987 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-02 01:54:44,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 01:54:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-02 01:54:44,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-02 01:54:44,987 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:44,987 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:44,988 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:44,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash 353125239, now seen corresponding path program 1 times [2018-12-02 01:54:44,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:44,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:44,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:44,988 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:45,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:45,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 01:54:45,026 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:54:45,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 01:54:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 01:54:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 01:54:45,027 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2018-12-02 01:54:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:45,065 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-02 01:54:45,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 01:54:45,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-12-02 01:54:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:45,065 INFO L225 Difference]: With dead ends: 36 [2018-12-02 01:54:45,066 INFO L226 Difference]: Without dead ends: 36 [2018-12-02 01:54:45,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:54:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-02 01:54:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2018-12-02 01:54:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-02 01:54:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-12-02 01:54:45,067 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2018-12-02 01:54:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:45,068 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-12-02 01:54:45,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 01:54:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-12-02 01:54:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-02 01:54:45,068 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:45,068 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:45,068 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:45,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash 353125238, now seen corresponding path program 1 times [2018-12-02 01:54:45,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:45,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:45,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:45,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:45,069 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:45,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:45,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 01:54:45,085 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:54:45,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 01:54:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 01:54:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 01:54:45,086 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 4 states. [2018-12-02 01:54:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:45,115 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-12-02 01:54:45,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 01:54:45,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-12-02 01:54:45,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:45,116 INFO L225 Difference]: With dead ends: 32 [2018-12-02 01:54:45,116 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 01:54:45,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:54:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 01:54:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2018-12-02 01:54:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-02 01:54:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-12-02 01:54:45,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2018-12-02 01:54:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:45,119 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-12-02 01:54:45,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 01:54:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-12-02 01:54:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-02 01:54:45,119 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:45,119 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:45,120 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-02 01:54:45,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:45,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1374583355, now seen corresponding path program 1 times [2018-12-02 01:54:45,120 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:54:45,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:45,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:45,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:54:45,121 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:54:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 01:54:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 01:54:45,152 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 01:54:45,159 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-02 01:54:45,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:54:45 BoogieIcfgContainer [2018-12-02 01:54:45,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 01:54:45,169 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 01:54:45,169 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 01:54:45,169 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 01:54:45,169 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:54:44" (3/4) ... [2018-12-02 01:54:45,172 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 01:54:45,172 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 01:54:45,172 INFO L168 Benchmark]: Toolchain (without parser) took 1114.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 952.4 MB in the beginning and 989.0 MB in the end (delta: -36.6 MB). Peak memory consumption was 92.9 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:45,173 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:54:45,173 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:45,174 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.40 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 01:54:45,174 INFO L168 Benchmark]: Boogie Preprocessor took 16.29 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 01:54:45,174 INFO L168 Benchmark]: RCFGBuilder took 172.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:45,174 INFO L168 Benchmark]: TraceAbstraction took 635.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 989.0 MB in the end (delta: 97.2 MB). Peak memory consumption was 97.2 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:45,175 INFO L168 Benchmark]: Witness Printer took 2.91 ms. Allocated memory is still 1.2 GB. Free memory is still 989.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:54:45,176 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 266.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 172.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 635.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 989.0 MB in the end (delta: 97.2 MB). Peak memory consumption was 97.2 MB. Max. memory is 11.5 GB. * Witness Printer took 2.91 ms. Allocated memory is still 1.2 GB. Free memory is still 989.0 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: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 626. Possible FailurePath: [L627] List t; [L628] List p = 0; VAL [p={0:0}] [L629] COND TRUE __VERIFIER_nondet_int() [L630] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] [L631] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] [L632] t->h = 1 VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] [L633] t->n = p VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] [L634] p = t VAL [malloc(sizeof(struct node))={14:0}, p={14:0}, t={14:0}] [L629] COND FALSE !(__VERIFIER_nondet_int()) [L636] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={14:0}, p={14:0}, t={14:0}] [L637] EXPR p->h VAL [malloc(sizeof(struct node))={14:0}, p={14:0}, p->h=1, t={14:0}] [L637] COND FALSE !(p->h != 1) [L640] EXPR p->n VAL [malloc(sizeof(struct node))={14:0}, p={14:0}, p->n={0:0}, t={14:0}] [L640] p = p->n [L636] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 9 error locations. UNSAFE Result, 0.5s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 161 SDtfs, 139 SDslu, 79 SDs, 0 SdLazy, 141 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 8 MinimizatonAttempts, 35 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 3166 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 6/6 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 01:54:46,555 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 01:54:46,556 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 01:54:46,564 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 01:54:46,565 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 01:54:46,565 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 01:54:46,566 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 01:54:46,567 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 01:54:46,567 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 01:54:46,568 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 01:54:46,568 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 01:54:46,568 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 01:54:46,569 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 01:54:46,569 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 01:54:46,570 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 01:54:46,570 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 01:54:46,570 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 01:54:46,571 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 01:54:46,573 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 01:54:46,574 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 01:54:46,575 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 01:54:46,575 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 01:54:46,576 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 01:54:46,576 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 01:54:46,576 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 01:54:46,577 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 01:54:46,577 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 01:54:46,578 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 01:54:46,578 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 01:54:46,579 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 01:54:46,579 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 01:54:46,580 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 01:54:46,580 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 01:54:46,580 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 01:54:46,581 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 01:54:46,581 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 01:54:46,581 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-02 01:54:46,591 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 01:54:46,591 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 01:54:46,592 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 01:54:46,592 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 01:54:46,592 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 01:54:46,593 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 01:54:46,593 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 01:54:46,593 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 01:54:46,593 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 01:54:46,593 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 01:54:46,594 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 01:54:46,594 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 01:54:46,594 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 01:54:46,594 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 01:54:46,594 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 01:54:46,595 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 01:54:46,595 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 01:54:46,595 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 01:54:46,595 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 01:54:46,595 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 01:54:46,595 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 01:54:46,596 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 01:54:46,596 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 01:54:46,596 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 01:54:46,596 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 01:54:46,596 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 01:54:46,596 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 01:54:46,596 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 01:54:46,597 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 01:54:46,597 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 01:54:46,597 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 01:54:46,597 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 01:54:46,597 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 01:54:46,597 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 01:54:46,598 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 01:54:46,598 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 01:54:46,598 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_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 -> a16cd99b349cc6bdff463f25bc1978dcd091a75b [2018-12-02 01:54:46,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 01:54:46,628 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 01:54:46,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 01:54:46,631 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 01:54:46,632 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 01:54:46,632 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-02 01:54:46,665 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data/ca909141a/d9cb2d21a0f94f58b5d812bbc4f07048/FLAGf842c7d82 [2018-12-02 01:54:47,090 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 01:54:47,090 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-02 01:54:47,097 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data/ca909141a/d9cb2d21a0f94f58b5d812bbc4f07048/FLAGf842c7d82 [2018-12-02 01:54:47,104 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/data/ca909141a/d9cb2d21a0f94f58b5d812bbc4f07048 [2018-12-02 01:54:47,106 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 01:54:47,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 01:54:47,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 01:54:47,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 01:54:47,110 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 01:54:47,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe97d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47, skipping insertion in model container [2018-12-02 01:54:47,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 01:54:47,141 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 01:54:47,302 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:54:47,310 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 01:54:47,333 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:54:47,392 INFO L195 MainTranslator]: Completed translation [2018-12-02 01:54:47,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47 WrapperNode [2018-12-02 01:54:47,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 01:54:47,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 01:54:47,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 01:54:47,393 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 01:54:47,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 01:54:47,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 01:54:47,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 01:54:47,412 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 01:54:47,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... [2018-12-02 01:54:47,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 01:54:47,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 01:54:47,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 01:54:47,431 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 01:54:47,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 01:54:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-02 01:54:47,461 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-02 01:54:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 01:54:47,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-02 01:54:47,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 01:54:47,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 01:54:47,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 01:54:47,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 01:54:47,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 01:54:47,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 01:54:47,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-02 01:54:47,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 01:54:47,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 01:54:47,626 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 01:54:47,626 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-02 01:54:47,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:54:47 BoogieIcfgContainer [2018-12-02 01:54:47,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 01:54:47,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 01:54:47,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 01:54:47,630 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 01:54:47,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:54:47" (1/3) ... [2018-12-02 01:54:47,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5488e46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:54:47, skipping insertion in model container [2018-12-02 01:54:47,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:54:47" (2/3) ... [2018-12-02 01:54:47,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5488e46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:54:47, skipping insertion in model container [2018-12-02 01:54:47,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:54:47" (3/3) ... [2018-12-02 01:54:47,632 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-02 01:54:47,638 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 01:54:47,642 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-02 01:54:47,650 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-02 01:54:47,665 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 01:54:47,666 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 01:54:47,666 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 01:54:47,666 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 01:54:47,666 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 01:54:47,666 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 01:54:47,666 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 01:54:47,666 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 01:54:47,666 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 01:54:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-02 01:54:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-02 01:54:47,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:47,679 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:47,680 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2018-12-02 01:54:47,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:47,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1122282559, now seen corresponding path program 1 times [2018-12-02 01:54:47,686 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:54:47,686 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 01:54:47,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:47,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:54:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:47,754 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:54:47,756 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:47,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 01:54:47,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 01:54:47,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 01:54:47,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:47,768 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2018-12-02 01:54:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:47,829 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-12-02 01:54:47,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 01:54:47,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-02 01:54:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:47,836 INFO L225 Difference]: With dead ends: 45 [2018-12-02 01:54:47,836 INFO L226 Difference]: Without dead ends: 36 [2018-12-02 01:54:47,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-02 01:54:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2018-12-02 01:54:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 01:54:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2018-12-02 01:54:47,861 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 9 [2018-12-02 01:54:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:47,862 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2018-12-02 01:54:47,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 01:54:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2018-12-02 01:54:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-02 01:54:47,863 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:47,863 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:47,863 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2018-12-02 01:54:47,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:47,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1122282603, now seen corresponding path program 1 times [2018-12-02 01:54:47,864 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:54:47,864 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:54:47,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:47,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:54:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:47,899 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:54:47,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:47,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 01:54:47,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 01:54:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 01:54:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:47,901 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2018-12-02 01:54:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:47,935 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-02 01:54:47,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 01:54:47,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-02 01:54:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:47,936 INFO L225 Difference]: With dead ends: 36 [2018-12-02 01:54:47,936 INFO L226 Difference]: Without dead ends: 35 [2018-12-02 01:54:47,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-02 01:54:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2018-12-02 01:54:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 01:54:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-02 01:54:47,939 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2018-12-02 01:54:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:47,939 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-02 01:54:47,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 01:54:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-02 01:54:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-02 01:54:47,940 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:47,940 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:47,940 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2018-12-02 01:54:47,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1122283918, now seen corresponding path program 1 times [2018-12-02 01:54:47,940 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:54:47,940 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 01:54:47,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:47,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:54:47,984 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 01:54:47,986 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 01:54:47,988 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 01:54:47,988 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 01:54:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:47,991 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:54:47,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:47,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 01:54:47,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 01:54:47,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 01:54:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:47,993 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2018-12-02 01:54:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:48,027 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-02 01:54:48,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 01:54:48,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-02 01:54:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:48,028 INFO L225 Difference]: With dead ends: 25 [2018-12-02 01:54:48,028 INFO L226 Difference]: Without dead ends: 25 [2018-12-02 01:54:48,029 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-02 01:54:48,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-02 01:54:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-02 01:54:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-02 01:54:48,030 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2018-12-02 01:54:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:48,031 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-02 01:54:48,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 01:54:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-02 01:54:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-02 01:54:48,031 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:48,031 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:48,031 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2018-12-02 01:54:48,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1122283919, now seen corresponding path program 1 times [2018-12-02 01:54:48,032 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:54:48,032 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:54:48,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:48,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:54:48,069 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 01:54:48,069 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 01:54:48,073 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 01:54:48,073 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-02 01:54:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:48,083 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:54:48,084 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:48,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 01:54:48,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 01:54:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 01:54:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:48,084 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2018-12-02 01:54:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:48,123 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-12-02 01:54:48,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 01:54:48,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-02 01:54:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:48,124 INFO L225 Difference]: With dead ends: 23 [2018-12-02 01:54:48,124 INFO L226 Difference]: Without dead ends: 23 [2018-12-02 01:54:48,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 01:54:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-02 01:54:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-02 01:54:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 01:54:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-02 01:54:48,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 9 [2018-12-02 01:54:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:48,126 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-02 01:54:48,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 01:54:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-02 01:54:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 01:54:48,127 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:48,127 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:48,127 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2018-12-02 01:54:48,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash -407681769, now seen corresponding path program 1 times [2018-12-02 01:54:48,128 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:54:48,128 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 01:54:48,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:48,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:54:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:48,168 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:54:48,169 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:48,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 01:54:48,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 01:54:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 01:54:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 01:54:48,170 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2018-12-02 01:54:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:48,237 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-02 01:54:48,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 01:54:48,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-02 01:54:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:48,238 INFO L225 Difference]: With dead ends: 36 [2018-12-02 01:54:48,238 INFO L226 Difference]: Without dead ends: 36 [2018-12-02 01:54:48,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:54:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-02 01:54:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2018-12-02 01:54:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-02 01:54:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-02 01:54:48,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2018-12-02 01:54:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:48,240 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-02 01:54:48,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 01:54:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-02 01:54:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 01:54:48,241 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:48,241 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:48,241 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2018-12-02 01:54:48,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash -407681725, now seen corresponding path program 1 times [2018-12-02 01:54:48,242 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:54:48,242 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 01:54:48,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:48,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:54:48,283 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 01:54:48,283 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 01:54:48,284 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 01:54:48,284 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-02 01:54:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:48,294 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:54:48,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:48,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 01:54:48,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 01:54:48,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 01:54:48,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 01:54:48,296 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2018-12-02 01:54:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:48,371 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-12-02 01:54:48,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 01:54:48,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-02 01:54:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:48,372 INFO L225 Difference]: With dead ends: 29 [2018-12-02 01:54:48,372 INFO L226 Difference]: Without dead ends: 29 [2018-12-02 01:54:48,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:54:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-02 01:54:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-12-02 01:54:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-02 01:54:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-12-02 01:54:48,374 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2018-12-02 01:54:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:48,374 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-12-02 01:54:48,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 01:54:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-12-02 01:54:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 01:54:48,375 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:48,375 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:48,375 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2018-12-02 01:54:48,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:48,375 INFO L82 PathProgramCache]: Analyzing trace with hash -407681724, now seen corresponding path program 1 times [2018-12-02 01:54:48,375 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:54:48,375 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/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 01:54:48,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:54:48,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:54:48,422 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 01:54:48,422 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 01:54:48,426 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 01:54:48,426 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-02 01:54:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:54:48,442 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:54:48,443 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:54:48,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 01:54:48,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 01:54:48,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 01:54:48,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 01:54:48,444 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2018-12-02 01:54:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:54:48,523 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-12-02 01:54:48,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 01:54:48,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-02 01:54:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:54:48,524 INFO L225 Difference]: With dead ends: 31 [2018-12-02 01:54:48,524 INFO L226 Difference]: Without dead ends: 31 [2018-12-02 01:54:48,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:54:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-02 01:54:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-12-02 01:54:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-02 01:54:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-02 01:54:48,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2018-12-02 01:54:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:54:48,526 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-02 01:54:48,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 01:54:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-02 01:54:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 01:54:48,526 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:54:48,526 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:54:48,527 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2018-12-02 01:54:48,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:54:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash 574816461, now seen corresponding path program 1 times [2018-12-02 01:54:48,527 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:54:48,527 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6df668d3-b734-44c9-ac09-97a4ea27a2b6/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:54:48,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:54:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 01:54:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 01:54:48,638 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 01:54:48,646 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-02 01:54:48,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:54:48 BoogieIcfgContainer [2018-12-02 01:54:48,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 01:54:48,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 01:54:48,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 01:54:48,657 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 01:54:48,657 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:54:47" (3/4) ... [2018-12-02 01:54:48,659 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 01:54:48,659 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 01:54:48,660 INFO L168 Benchmark]: Toolchain (without parser) took 1553.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 939.3 MB in the beginning and 951.2 MB in the end (delta: -11.8 MB). Peak memory consumption was 136.5 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:48,661 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:54:48,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:48,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:48,662 INFO L168 Benchmark]: Boogie Preprocessor took 18.02 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 01:54:48,662 INFO L168 Benchmark]: RCFGBuilder took 195.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:48,662 INFO L168 Benchmark]: TraceAbstraction took 1029.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 951.2 MB in the end (delta: 159.7 MB). Peak memory consumption was 159.7 MB. Max. memory is 11.5 GB. [2018-12-02 01:54:48,662 INFO L168 Benchmark]: Witness Printer took 2.83 ms. Allocated memory is still 1.2 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:54:48,664 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 285.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.02 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 195.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1029.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 951.2 MB in the end (delta: 159.7 MB). Peak memory consumption was 159.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.83 ms. Allocated memory is still 1.2 GB. Free memory is still 951.2 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: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 626. Possible FailurePath: [L627] List t; [L628] List p = 0; VAL [p={0:0}] [L629] COND TRUE __VERIFIER_nondet_int() [L630] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L631] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L632] t->h = 1 VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L633] t->n = p VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L634] p = t VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, t={-2147483648:0}] [L629] COND FALSE !(__VERIFIER_nondet_int()) [L636] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, t={-2147483648:0}] [L637] EXPR p->h VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=1, t={-2147483648:0}] [L637] COND FALSE !(p->h != 1) [L640] EXPR p->n VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->n={0:0}, t={-2147483648:0}] [L640] p = p->n [L636] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 9 error locations. UNSAFE Result, 0.9s OverallTime, 8 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 120 SDtfs, 134 SDslu, 72 SDs, 0 SdLazy, 141 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 2791 SizeOfPredicates, 13 NumberOfNonLiveVariables, 301 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 3/3 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...