./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_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:01:56,151 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 06:01:56,152 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 06:01:56,159 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 06:01:56,160 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 06:01:56,160 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 06:01:56,161 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 06:01:56,163 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 06:01:56,164 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 06:01:56,164 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 06:01:56,165 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 06:01:56,165 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 06:01:56,166 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 06:01:56,167 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 06:01:56,168 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 06:01:56,168 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 06:01:56,169 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 06:01:56,170 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 06:01:56,171 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 06:01:56,172 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 06:01:56,173 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 06:01:56,174 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 06:01:56,175 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 06:01:56,175 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 06:01:56,175 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 06:01:56,176 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 06:01:56,176 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 06:01:56,177 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 06:01:56,178 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 06:01:56,178 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 06:01:56,178 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 06:01:56,179 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 06:01:56,179 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 06:01:56,179 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 06:01:56,180 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 06:01:56,180 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 06:01:56,180 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 06:01:56,188 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 06:01:56,189 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 06:01:56,189 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 06:01:56,189 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 06:01:56,190 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 06:01:56,190 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 06:01:56,190 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 06:01:56,190 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 06:01:56,190 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 06:01:56,190 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 06:01:56,190 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 06:01:56,190 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 06:01:56,191 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 06:01:56,191 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 06:01:56,191 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 06:01:56,191 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 06:01:56,192 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 06:01:56,192 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 06:01:56,192 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 06:01:56,192 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 06:01:56,192 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 06:01:56,192 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 06:01:56,192 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 06:01:56,193 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 06:01:56,193 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 06:01:56,193 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 06:01:56,193 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 06:01:56,193 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 06:01:56,193 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 06:01:56,193 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 06:01:56,193 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 06:01:56,194 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 06:01:56,194 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 06:01:56,194 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 06:01:56,194 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 06:01:56,194 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 06:01:56,194 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_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:01:56,218 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 06:01:56,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 06:01:56,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 06:01:56,228 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 06:01:56,228 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 06:01:56,228 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-09 06:01:56,263 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data/6dfdd246d/cc028de56d4e4d1b82a909efe2a63964/FLAG86e7ed68f [2018-12-09 06:01:56,740 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 06:01:56,741 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-09 06:01:56,750 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data/6dfdd246d/cc028de56d4e4d1b82a909efe2a63964/FLAG86e7ed68f [2018-12-09 06:01:56,758 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data/6dfdd246d/cc028de56d4e4d1b82a909efe2a63964 [2018-12-09 06:01:56,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 06:01:56,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 06:01:56,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 06:01:56,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 06:01:56,764 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 06:01:56,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:01:56" (1/1) ... [2018-12-09 06:01:56,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178df10d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:56, skipping insertion in model container [2018-12-09 06:01:56,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:01:56" (1/1) ... [2018-12-09 06:01:56,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 06:01:56,794 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 06:01:56,943 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 06:01:56,950 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 06:01:57,002 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 06:01:57,034 INFO L195 MainTranslator]: Completed translation [2018-12-09 06:01:57,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57 WrapperNode [2018-12-09 06:01:57,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 06:01:57,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 06:01:57,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 06:01:57,035 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 06:01:57,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 06:01:57,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 06:01:57,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 06:01:57,052 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 06:01:57,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... [2018-12-09 06:01:57,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 06:01:57,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 06:01:57,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 06:01:57,069 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 06:01:57,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:01:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-09 06:01:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-09 06:01:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 06:01:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 06:01:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 06:01:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 06:01:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 06:01:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 06:01:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 06:01:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-09 06:01:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-09 06:01:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 06:01:57,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 06:01:57,226 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 06:01:57,226 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 06:01:57,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:01:57 BoogieIcfgContainer [2018-12-09 06:01:57,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 06:01:57,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 06:01:57,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 06:01:57,228 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 06:01:57,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:01:56" (1/3) ... [2018-12-09 06:01:57,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db490f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:01:57, skipping insertion in model container [2018-12-09 06:01:57,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:57" (2/3) ... [2018-12-09 06:01:57,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db490f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:01:57, skipping insertion in model container [2018-12-09 06:01:57,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:01:57" (3/3) ... [2018-12-09 06:01:57,230 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-09 06:01:57,236 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 06:01:57,240 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-09 06:01:57,248 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-09 06:01:57,262 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 06:01:57,263 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 06:01:57,263 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 06:01:57,263 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 06:01:57,263 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 06:01:57,263 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 06:01:57,263 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 06:01:57,263 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 06:01:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-12-09 06:01:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 06:01:57,277 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,278 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:01:57,279 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,283 INFO L82 PathProgramCache]: Analyzing trace with hash -655600941, now seen corresponding path program 1 times [2018-12-09 06:01:57,284 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,313 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:01:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:01:57,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:01:57,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 06:01:57,354 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 06:01:57,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 06:01:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 06:01:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 06:01:57,366 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2018-12-09 06:01:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:01:57,376 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-12-09 06:01:57,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 06:01:57,376 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-12-09 06:01:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:01:57,381 INFO L225 Difference]: With dead ends: 34 [2018-12-09 06:01:57,382 INFO L226 Difference]: Without dead ends: 27 [2018-12-09 06:01:57,383 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 [2018-12-09 06:01:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-09 06:01:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-09 06:01:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-09 06:01:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-09 06:01:57,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2018-12-09 06:01:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:01:57,403 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-09 06:01:57,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 06:01:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-09 06:01:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 06:01:57,403 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,403 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:01:57,403 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1150557056, now seen corresponding path program 1 times [2018-12-09 06:01:57,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,405 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:01:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:01:57,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:01:57,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 06:01:57,427 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 06:01:57,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 06:01:57,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 06:01:57,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 06:01:57,428 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2018-12-09 06:01:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:01:57,456 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-12-09 06:01:57,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 06:01:57,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 06:01:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:01:57,457 INFO L225 Difference]: With dead ends: 39 [2018-12-09 06:01:57,457 INFO L226 Difference]: Without dead ends: 38 [2018-12-09 06:01:57,457 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 [2018-12-09 06:01:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-09 06:01:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-12-09 06:01:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-09 06:01:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-12-09 06:01:57,460 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 10 [2018-12-09 06:01:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:01:57,460 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-12-09 06:01:57,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 06:01:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-12-09 06:01:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 06:01:57,461 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,461 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:01:57,461 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1150557101, now seen corresponding path program 1 times [2018-12-09 06:01:57,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:01:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:01:57,483 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:01:57,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 06:01:57,483 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 06:01:57,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 06:01:57,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 06:01:57,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 06:01:57,484 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 3 states. [2018-12-09 06:01:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:01:57,497 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2018-12-09 06:01:57,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 06:01:57,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 06:01:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:01:57,498 INFO L225 Difference]: With dead ends: 38 [2018-12-09 06:01:57,498 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 06:01:57,498 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 [2018-12-09 06:01:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 06:01:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2018-12-09 06:01:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-09 06:01:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-09 06:01:57,500 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2018-12-09 06:01:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:01:57,500 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-09 06:01:57,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 06:01:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-09 06:01:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 06:01:57,501 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,501 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:01:57,501 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1150558415, now seen corresponding path program 1 times [2018-12-09 06:01:57,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,502 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:01:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:01:57,522 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:01:57,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 06:01:57,522 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 06:01:57,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 06:01:57,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 06:01:57,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 06:01:57,523 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 3 states. [2018-12-09 06:01:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:01:57,540 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-09 06:01:57,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 06:01:57,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 06:01:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:01:57,540 INFO L225 Difference]: With dead ends: 27 [2018-12-09 06:01:57,540 INFO L226 Difference]: Without dead ends: 27 [2018-12-09 06:01:57,541 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 [2018-12-09 06:01:57,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-09 06:01:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-09 06:01:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-09 06:01:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-09 06:01:57,542 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2018-12-09 06:01:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:01:57,542 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-09 06:01:57,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 06:01:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-09 06:01:57,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 06:01:57,543 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,543 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:01:57,543 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1150558416, now seen corresponding path program 1 times [2018-12-09 06:01:57,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,544 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:01:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:01:57,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:01:57,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 06:01:57,578 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 06:01:57,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 06:01:57,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 06:01:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 06:01:57,578 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2018-12-09 06:01:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:01:57,592 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-09 06:01:57,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 06:01:57,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 06:01:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:01:57,593 INFO L225 Difference]: With dead ends: 25 [2018-12-09 06:01:57,593 INFO L226 Difference]: Without dead ends: 25 [2018-12-09 06:01:57,593 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 [2018-12-09 06:01:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-09 06:01:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-09 06:01:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-09 06:01:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-09 06:01:57,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2018-12-09 06:01:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:01:57,595 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-09 06:01:57,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 06:01:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-09 06:01:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 06:01:57,595 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,595 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:01:57,596 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash 353125194, now seen corresponding path program 1 times [2018-12-09 06:01:57,596 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,597 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:01:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:01:57,619 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:01:57,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 06:01:57,619 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 06:01:57,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 06:01:57,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 06:01:57,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 06:01:57,620 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2018-12-09 06:01:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:01:57,650 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2018-12-09 06:01:57,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 06:01:57,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-12-09 06:01:57,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:01:57,651 INFO L225 Difference]: With dead ends: 38 [2018-12-09 06:01:57,651 INFO L226 Difference]: Without dead ends: 38 [2018-12-09 06:01:57,651 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 [2018-12-09 06:01:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-09 06:01:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2018-12-09 06:01:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 06:01:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-09 06:01:57,653 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2018-12-09 06:01:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:01:57,654 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-09 06:01:57,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 06:01:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-09 06:01:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 06:01:57,654 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,654 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:01:57,654 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,654 INFO L82 PathProgramCache]: Analyzing trace with hash 353125239, now seen corresponding path program 1 times [2018-12-09 06:01:57,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,655 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:01:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:01:57,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:01:57,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 06:01:57,696 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 06:01:57,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 06:01:57,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 06:01:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 06:01:57,696 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2018-12-09 06:01:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:01:57,737 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-09 06:01:57,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 06:01:57,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-12-09 06:01:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:01:57,738 INFO L225 Difference]: With dead ends: 36 [2018-12-09 06:01:57,738 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 06:01:57,738 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 [2018-12-09 06:01:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 06:01:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2018-12-09 06:01:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-09 06:01:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-12-09 06:01:57,740 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2018-12-09 06:01:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:01:57,740 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-12-09 06:01:57,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 06:01:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-12-09 06:01:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 06:01:57,740 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,740 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:01:57,741 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash 353125238, now seen corresponding path program 1 times [2018-12-09 06:01:57,741 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,741 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:01:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:01:57,758 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:01:57,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 06:01:57,758 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 06:01:57,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 06:01:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 06:01:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 06:01:57,759 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 4 states. [2018-12-09 06:01:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:01:57,802 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-12-09 06:01:57,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 06:01:57,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-12-09 06:01:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:01:57,803 INFO L225 Difference]: With dead ends: 32 [2018-12-09 06:01:57,803 INFO L226 Difference]: Without dead ends: 32 [2018-12-09 06:01:57,803 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 [2018-12-09 06:01:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-09 06:01:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2018-12-09 06:01:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 06:01:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-12-09 06:01:57,805 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2018-12-09 06:01:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:01:57,805 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-12-09 06:01:57,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 06:01:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-12-09 06:01:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-09 06:01:57,806 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:01:57,806 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] [2018-12-09 06:01:57,806 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-09 06:01:57,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:01:57,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1374583355, now seen corresponding path program 1 times [2018-12-09 06:01:57,806 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 06:01:57,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:01:57,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 06:01:57,807 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 06:01:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 06:01:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 06:01:57,833 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 06:01:57,840 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-09 06:01:57,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:01:57 BoogieIcfgContainer [2018-12-09 06:01:57,850 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 06:01:57,850 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 06:01:57,850 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 06:01:57,850 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 06:01:57,851 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:01:57" (3/4) ... [2018-12-09 06:01:57,853 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 06:01:57,853 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 06:01:57,853 INFO L168 Benchmark]: Toolchain (without parser) took 1092.81 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.7 MB). Free memory was 947.0 MB in the beginning and 948.3 MB in the end (delta: -1.3 MB). Peak memory consumption was 88.3 MB. Max. memory is 11.5 GB. [2018-12-09 06:01:57,854 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 06:01:57,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.7 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -129.8 MB). Peak memory consumption was 30.1 MB. Max. memory is 11.5 GB. [2018-12-09 06:01:57,855 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-12-09 06:01:57,855 INFO L168 Benchmark]: Boogie Preprocessor took 15.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 06:01:57,856 INFO L168 Benchmark]: RCFGBuilder took 157.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-12-09 06:01:57,856 INFO L168 Benchmark]: TraceAbstraction took 623.11 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 948.3 MB in the end (delta: 106.9 MB). Peak memory consumption was 106.9 MB. Max. memory is 11.5 GB. [2018-12-09 06:01:57,856 INFO L168 Benchmark]: Witness Printer took 2.93 ms. Allocated memory is still 1.1 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 06:01:57,858 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 273.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.7 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -129.8 MB). Peak memory consumption was 30.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 157.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 623.11 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 948.3 MB in the end (delta: 106.9 MB). Peak memory consumption was 106.9 MB. Max. memory is 11.5 GB. * Witness Printer took 2.93 ms. Allocated memory is still 1.1 GB. Free memory is still 948.3 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 [2018-12-09 06:01:59,217 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 06:01:59,218 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 06:01:59,224 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 06:01:59,224 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 06:01:59,225 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 06:01:59,225 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 06:01:59,226 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 06:01:59,227 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 06:01:59,227 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 06:01:59,228 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 06:01:59,228 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 06:01:59,228 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 06:01:59,229 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 06:01:59,229 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 06:01:59,230 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 06:01:59,230 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 06:01:59,231 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 06:01:59,232 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 06:01:59,233 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 06:01:59,233 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 06:01:59,234 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 06:01:59,235 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 06:01:59,235 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 06:01:59,235 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 06:01:59,235 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 06:01:59,236 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 06:01:59,236 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 06:01:59,237 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 06:01:59,237 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 06:01:59,237 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 06:01:59,238 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 06:01:59,238 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 06:01:59,238 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 06:01:59,238 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 06:01:59,239 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 06:01:59,239 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-09 06:01:59,246 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 06:01:59,246 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 06:01:59,247 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 06:01:59,247 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 06:01:59,247 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 06:01:59,247 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 06:01:59,247 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 06:01:59,247 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 06:01:59,247 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 06:01:59,247 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 06:01:59,248 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 06:01:59,248 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 06:01:59,248 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 06:01:59,248 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 06:01:59,248 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 06:01:59,248 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 06:01:59,248 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 06:01:59,248 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 06:01:59,248 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 06:01:59,249 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 06:01:59,249 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 06:01:59,250 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 06:01:59,250 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 06:01:59,250 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-09 06:01:59,250 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 06:01:59,250 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-09 06:01:59,250 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_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:01:59,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 06:01:59,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 06:01:59,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 06:01:59,278 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 06:01:59,278 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 06:01:59,279 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-09 06:01:59,316 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data/5b67135ec/7b94bcda48bc4f34b7dc1316d0cf6a47/FLAGd74b0b6f0 [2018-12-09 06:01:59,786 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 06:01:59,786 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-09 06:01:59,792 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data/5b67135ec/7b94bcda48bc4f34b7dc1316d0cf6a47/FLAGd74b0b6f0 [2018-12-09 06:01:59,800 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/bin-2019/utaipan/data/5b67135ec/7b94bcda48bc4f34b7dc1316d0cf6a47 [2018-12-09 06:01:59,802 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 06:01:59,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 06:01:59,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 06:01:59,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 06:01:59,805 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 06:01:59,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:01:59" (1/1) ... [2018-12-09 06:01:59,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e74bf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:59, skipping insertion in model container [2018-12-09 06:01:59,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:01:59" (1/1) ... [2018-12-09 06:01:59,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 06:01:59,829 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 06:01:59,982 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 06:01:59,992 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 06:02:00,022 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 06:02:00,052 INFO L195 MainTranslator]: Completed translation [2018-12-09 06:02:00,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00 WrapperNode [2018-12-09 06:02:00,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 06:02:00,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 06:02:00,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 06:02:00,053 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 06:02:00,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 06:02:00,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 06:02:00,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 06:02:00,106 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 06:02:00,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... [2018-12-09 06:02:00,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 06:02:00,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 06:02:00,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 06:02:00,128 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 06:02:00,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-09 06:02:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-09 06:02:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 06:02:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-09 06:02:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 06:02:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 06:02:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 06:02:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 06:02:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-09 06:02:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-09 06:02:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-09 06:02:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 06:02:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 06:02:00,312 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 06:02:00,312 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 06:02:00,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:00 BoogieIcfgContainer [2018-12-09 06:02:00,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 06:02:00,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 06:02:00,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 06:02:00,316 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 06:02:00,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:01:59" (1/3) ... [2018-12-09 06:02:00,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cfb5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:00, skipping insertion in model container [2018-12-09 06:02:00,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:00" (2/3) ... [2018-12-09 06:02:00,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cfb5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:00, skipping insertion in model container [2018-12-09 06:02:00,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:00" (3/3) ... [2018-12-09 06:02:00,319 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-12-09 06:02:00,328 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 06:02:00,333 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-09 06:02:00,343 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-09 06:02:00,358 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 06:02:00,358 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 06:02:00,358 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 06:02:00,358 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 06:02:00,358 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 06:02:00,358 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 06:02:00,358 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 06:02:00,359 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 06:02:00,359 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 06:02:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-09 06:02:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 06:02:00,371 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:02:00,371 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:02:00,373 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-09 06:02:00,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:02:00,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1122282559, now seen corresponding path program 1 times [2018-12-09 06:02:00,378 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 06:02:00,378 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:00,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:02:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:02:00,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 06:02:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:02:00,448 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 06:02:00,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:02:00,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 06:02:00,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 06:02:00,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 06:02:00,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 06:02:00,461 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2018-12-09 06:02:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:02:00,526 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-12-09 06:02:00,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 06:02:00,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-09 06:02:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:02:00,535 INFO L225 Difference]: With dead ends: 45 [2018-12-09 06:02:00,535 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 06:02:00,537 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 [2018-12-09 06:02:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 06:02:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2018-12-09 06:02:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 06:02:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2018-12-09 06:02:00,557 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 9 [2018-12-09 06:02:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:02:00,557 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2018-12-09 06:02:00,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 06:02:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2018-12-09 06:02:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 06:02:00,557 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:02:00,557 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:02:00,558 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-09 06:02:00,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:02:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1122282603, now seen corresponding path program 1 times [2018-12-09 06:02:00,558 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 06:02:00,558 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:00,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:02:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:02:00,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 06:02:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:02:00,604 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 06:02:00,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:02:00,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 06:02:00,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 06:02:00,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 06:02:00,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 06:02:00,607 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2018-12-09 06:02:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:02:00,644 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-09 06:02:00,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 06:02:00,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-09 06:02:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:02:00,645 INFO L225 Difference]: With dead ends: 36 [2018-12-09 06:02:00,645 INFO L226 Difference]: Without dead ends: 35 [2018-12-09 06:02:00,645 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 [2018-12-09 06:02:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-09 06:02:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2018-12-09 06:02:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-09 06:02:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-09 06:02:00,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2018-12-09 06:02:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:02:00,648 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-09 06:02:00,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 06:02:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-09 06:02:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 06:02:00,648 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:02:00,648 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:02:00,648 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-09 06:02:00,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:02:00,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1122283918, now seen corresponding path program 1 times [2018-12-09 06:02:00,649 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 06:02:00,649 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:00,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:02:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:02:00,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 06:02:00,694 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 [2018-12-09 06:02:00,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 06:02:00,698 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 06:02:00,698 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-09 06:02:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:02:00,705 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 06:02:00,705 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:02:00,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 06:02:00,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 06:02:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 06:02:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 06:02:00,706 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2018-12-09 06:02:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:02:00,741 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-09 06:02:00,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 06:02:00,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-09 06:02:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:02:00,742 INFO L225 Difference]: With dead ends: 25 [2018-12-09 06:02:00,742 INFO L226 Difference]: Without dead ends: 25 [2018-12-09 06:02:00,742 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 [2018-12-09 06:02:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-09 06:02:00,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-09 06:02:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-09 06:02:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-09 06:02:00,744 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2018-12-09 06:02:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:02:00,744 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-09 06:02:00,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 06:02:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-09 06:02:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 06:02:00,745 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:02:00,745 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:02:00,745 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-09 06:02:00,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:02:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1122283919, now seen corresponding path program 1 times [2018-12-09 06:02:00,745 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 06:02:00,746 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:00,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:02:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:02:00,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 06:02:00,782 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 [2018-12-09 06:02:00,783 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 06:02:00,791 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 06:02:00,791 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-09 06:02:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:02:00,799 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 06:02:00,800 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:02:00,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 06:02:00,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 06:02:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 06:02:00,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 06:02:00,800 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2018-12-09 06:02:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:02:00,836 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-12-09 06:02:00,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 06:02:00,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-09 06:02:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:02:00,837 INFO L225 Difference]: With dead ends: 23 [2018-12-09 06:02:00,837 INFO L226 Difference]: Without dead ends: 23 [2018-12-09 06:02:00,837 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 [2018-12-09 06:02:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-09 06:02:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-09 06:02:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-09 06:02:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-09 06:02:00,839 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 9 [2018-12-09 06:02:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:02:00,839 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-09 06:02:00,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 06:02:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-09 06:02:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 06:02:00,839 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:02:00,839 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:02:00,840 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-09 06:02:00,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:02:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash -407681769, now seen corresponding path program 1 times [2018-12-09 06:02:00,840 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 06:02:00,840 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:00,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:02:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:02:00,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 06:02:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:02:00,880 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 06:02:00,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:02:00,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 06:02:00,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 06:02:00,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 06:02:00,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 06:02:00,882 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2018-12-09 06:02:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:02:00,947 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-09 06:02:00,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 06:02:00,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-09 06:02:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:02:00,948 INFO L225 Difference]: With dead ends: 36 [2018-12-09 06:02:00,948 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 06:02:00,948 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 [2018-12-09 06:02:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 06:02:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2018-12-09 06:02:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 06:02:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-09 06:02:00,950 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2018-12-09 06:02:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:02:00,951 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-09 06:02:00,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 06:02:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-09 06:02:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 06:02:00,951 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:02:00,951 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:02:00,951 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-09 06:02:00,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:02:00,952 INFO L82 PathProgramCache]: Analyzing trace with hash -407681725, now seen corresponding path program 1 times [2018-12-09 06:02:00,952 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 06:02:00,952 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:00,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:02:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:02:00,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 06:02:00,993 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 [2018-12-09 06:02:00,993 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 06:02:00,995 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 06:02:00,995 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-09 06:02:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:02:01,002 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 06:02:01,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:02:01,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 06:02:01,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 06:02:01,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 06:02:01,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 06:02:01,004 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2018-12-09 06:02:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:02:01,077 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-12-09 06:02:01,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 06:02:01,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-09 06:02:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:02:01,078 INFO L225 Difference]: With dead ends: 29 [2018-12-09 06:02:01,078 INFO L226 Difference]: Without dead ends: 29 [2018-12-09 06:02:01,079 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 [2018-12-09 06:02:01,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-09 06:02:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-12-09 06:02:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 06:02:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-12-09 06:02:01,081 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2018-12-09 06:02:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:02:01,081 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-12-09 06:02:01,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 06:02:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-12-09 06:02:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 06:02:01,082 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:02:01,082 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:02:01,082 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-09 06:02:01,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:02:01,083 INFO L82 PathProgramCache]: Analyzing trace with hash -407681724, now seen corresponding path program 1 times [2018-12-09 06:02:01,083 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 06:02:01,083 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:01,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:02:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 06:02:01,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 06:02:01,140 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 [2018-12-09 06:02:01,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 06:02:01,145 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 06:02:01,145 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-09 06:02:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 06:02:01,162 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 06:02:01,163 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 06:02:01,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 06:02:01,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 06:02:01,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 06:02:01,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 06:02:01,164 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2018-12-09 06:02:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 06:02:01,255 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-12-09 06:02:01,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 06:02:01,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-09 06:02:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 06:02:01,256 INFO L225 Difference]: With dead ends: 31 [2018-12-09 06:02:01,256 INFO L226 Difference]: Without dead ends: 31 [2018-12-09 06:02:01,256 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 [2018-12-09 06:02:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-09 06:02:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-12-09 06:02:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 06:02:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-09 06:02:01,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2018-12-09 06:02:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 06:02:01,258 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-09 06:02:01,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 06:02:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-09 06:02:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 06:02:01,259 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 06:02:01,259 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 06:02:01,259 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-09 06:02:01,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 06:02:01,259 INFO L82 PathProgramCache]: Analyzing trace with hash 574816461, now seen corresponding path program 1 times [2018-12-09 06:02:01,259 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 06:02:01,260 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1395b41-c8b5-41f2-b98b-953b63f3a045/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 [2018-12-09 06:02:01,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 06:02:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 06:02:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 06:02:01,375 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 06:02:01,383 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-09 06:02:01,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:02:01 BoogieIcfgContainer [2018-12-09 06:02:01,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 06:02:01,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 06:02:01,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 06:02:01,393 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 06:02:01,394 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:00" (3/4) ... [2018-12-09 06:02:01,396 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 06:02:01,396 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 06:02:01,396 INFO L168 Benchmark]: Toolchain (without parser) took 1594.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 938.0 MB in the beginning and 949.8 MB in the end (delta: -11.8 MB). Peak memory consumption was 122.9 MB. Max. memory is 11.5 GB. [2018-12-09 06:02:01,397 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. [2018-12-09 06:02:01,397 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.38 ms. Allocated memory is still 1.0 GB. Free memory was 938.0 MB in the beginning and 916.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2018-12-09 06:02:01,398 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 916.5 MB in the beginning and 1.1 GB in the end (delta: -205.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 11.5 GB. [2018-12-09 06:02:01,398 INFO L168 Benchmark]: Boogie Preprocessor took 21.80 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. [2018-12-09 06:02:01,398 INFO L168 Benchmark]: RCFGBuilder took 185.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-12-09 06:02:01,398 INFO L168 Benchmark]: TraceAbstraction took 1079.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 949.8 MB in the end (delta: 154.5 MB). Peak memory consumption was 154.5 MB. Max. memory is 11.5 GB. [2018-12-09 06:02:01,399 INFO L168 Benchmark]: Witness Printer took 2.77 ms. Allocated memory is still 1.2 GB. Free memory is still 949.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 06:02:01,400 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 249.38 ms. Allocated memory is still 1.0 GB. Free memory was 938.0 MB in the beginning and 916.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 916.5 MB in the beginning and 1.1 GB in the end (delta: -205.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.80 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 185.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1079.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 949.8 MB in the end (delta: 154.5 MB). Peak memory consumption was 154.5 MB. Max. memory is 11.5 GB. * Witness Printer took 2.77 ms. Allocated memory is still 1.2 GB. Free memory is still 949.8 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, 1.0s 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...