./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.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_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/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 707f24c72c63346ec05641b1665aeeecec8225e6 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 05:37:30,003 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 05:37:30,004 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 05:37:30,010 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 05:37:30,010 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 05:37:30,011 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 05:37:30,011 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 05:37:30,012 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 05:37:30,013 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 05:37:30,014 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 05:37:30,014 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 05:37:30,014 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 05:37:30,015 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 05:37:30,015 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 05:37:30,016 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 05:37:30,016 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 05:37:30,017 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 05:37:30,018 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 05:37:30,018 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 05:37:30,019 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 05:37:30,020 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 05:37:30,020 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 05:37:30,022 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 05:37:30,022 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 05:37:30,022 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 05:37:30,022 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 05:37:30,023 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 05:37:30,023 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 05:37:30,024 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 05:37:30,024 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 05:37:30,024 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 05:37:30,025 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 05:37:30,025 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 05:37:30,025 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 05:37:30,026 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 05:37:30,026 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 05:37:30,026 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-03 05:37:30,034 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 05:37:30,034 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 05:37:30,034 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 05:37:30,035 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 05:37:30,035 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 05:37:30,035 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 05:37:30,035 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 05:37:30,035 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 05:37:30,035 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 05:37:30,035 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 05:37:30,035 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 05:37:30,035 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 05:37:30,036 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 05:37:30,036 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 05:37:30,036 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 05:37:30,036 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 05:37:30,036 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 05:37:30,036 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-03 05:37:30,036 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 05:37:30,037 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 05:37:30,037 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 05:37:30,038 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 05:37:30,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 05:37:30,038 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 05:37:30,038 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 05:37:30,038 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 05:37:30,038 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 05:37:30,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 05:37:30,038 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_6466efa4-5bd4-4df1-873d-01148bc46790/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 -> 707f24c72c63346ec05641b1665aeeecec8225e6 [2018-12-03 05:37:30,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 05:37:30,064 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 05:37:30,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 05:37:30,067 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 05:37:30,067 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 05:37:30,067 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-12-03 05:37:30,105 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/data/d9cbd5375/c2521b403a4b46cda0f9bf3f15ea75ed/FLAG38dfd3b73 [2018-12-03 05:37:30,473 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 05:37:30,473 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-12-03 05:37:30,480 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/data/d9cbd5375/c2521b403a4b46cda0f9bf3f15ea75ed/FLAG38dfd3b73 [2018-12-03 05:37:30,848 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/data/d9cbd5375/c2521b403a4b46cda0f9bf3f15ea75ed [2018-12-03 05:37:30,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 05:37:30,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 05:37:30,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 05:37:30,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 05:37:30,853 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 05:37:30,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:37:30" (1/1) ... [2018-12-03 05:37:30,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89db293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:30, skipping insertion in model container [2018-12-03 05:37:30,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:37:30" (1/1) ... [2018-12-03 05:37:30,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 05:37:30,884 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 05:37:31,028 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 05:37:31,034 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 05:37:31,089 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 05:37:31,116 INFO L195 MainTranslator]: Completed translation [2018-12-03 05:37:31,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31 WrapperNode [2018-12-03 05:37:31,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 05:37:31,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 05:37:31,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 05:37:31,117 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 05:37:31,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 05:37:31,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 05:37:31,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 05:37:31,141 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 05:37:31,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... [2018-12-03 05:37:31,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 05:37:31,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 05:37:31,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 05:37:31,158 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 05:37:31,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/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 [2018-12-03 05:37:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 05:37:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-03 05:37:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure cmemrchr [2018-12-03 05:37:31,189 INFO L138 BoogieDeclarations]: Found implementation of procedure cmemrchr [2018-12-03 05:37:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 05:37:31,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 05:37:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 05:37:31,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 05:37:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-03 05:37:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 05:37:31,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 05:37:31,317 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 05:37:31,317 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 05:37:31,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:37:31 BoogieIcfgContainer [2018-12-03 05:37:31,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 05:37:31,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 05:37:31,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 05:37:31,322 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 05:37:31,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 05:37:30" (1/3) ... [2018-12-03 05:37:31,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652390b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:37:31, skipping insertion in model container [2018-12-03 05:37:31,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:37:31" (2/3) ... [2018-12-03 05:37:31,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652390b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:37:31, skipping insertion in model container [2018-12-03 05:37:31,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:37:31" (3/3) ... [2018-12-03 05:37:31,324 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-12-03 05:37:31,333 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 05:37:31,339 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-12-03 05:37:31,353 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-12-03 05:37:31,373 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 05:37:31,373 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-03 05:37:31,373 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 05:37:31,373 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 05:37:31,373 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 05:37:31,373 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 05:37:31,373 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 05:37:31,373 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 05:37:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-12-03 05:37:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 05:37:31,391 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:37:31,392 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:37:31,393 INFO L423 AbstractCegarLoop]: === Iteration 1 === [cmemrchrErr0REQUIRES_VIOLATION, cmemrchrErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-03 05:37:31,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:31,397 INFO L82 PathProgramCache]: Analyzing trace with hash 635677569, now seen corresponding path program 1 times [2018-12-03 05:37:31,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:37:31,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:31,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:31,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:31,428 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:37:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:31,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 05:37:31,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-03 05:37:31,532 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 05:37:31,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 05:37:31,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 05:37:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-03 05:37:31,545 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2018-12-03 05:37:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:37:31,638 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-12-03 05:37:31,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 05:37:31,640 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-12-03 05:37:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:37:31,646 INFO L225 Difference]: With dead ends: 30 [2018-12-03 05:37:31,646 INFO L226 Difference]: Without dead ends: 27 [2018-12-03 05:37:31,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-12-03 05:37:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-03 05:37:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-12-03 05:37:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 05:37:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-03 05:37:31,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2018-12-03 05:37:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:37:31,669 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-03 05:37:31,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 05:37:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-03 05:37:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 05:37:31,670 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:37:31,670 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:37:31,671 INFO L423 AbstractCegarLoop]: === Iteration 2 === [cmemrchrErr0REQUIRES_VIOLATION, cmemrchrErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-03 05:37:31,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:31,671 INFO L82 PathProgramCache]: Analyzing trace with hash 635677570, now seen corresponding path program 1 times [2018-12-03 05:37:31,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:37:31,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:31,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:31,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:31,672 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:37:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:31,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 05:37:31,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-03 05:37:31,795 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 05:37:31,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 05:37:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 05:37:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-03 05:37:31,796 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2018-12-03 05:37:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:37:31,908 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2018-12-03 05:37:31,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 05:37:31,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-12-03 05:37:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:37:31,909 INFO L225 Difference]: With dead ends: 47 [2018-12-03 05:37:31,910 INFO L226 Difference]: Without dead ends: 47 [2018-12-03 05:37:31,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-12-03 05:37:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-03 05:37:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2018-12-03 05:37:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-03 05:37:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2018-12-03 05:37:31,915 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 14 [2018-12-03 05:37:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:37:31,916 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2018-12-03 05:37:31,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 05:37:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2018-12-03 05:37:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 05:37:31,916 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:37:31,916 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:37:31,917 INFO L423 AbstractCegarLoop]: === Iteration 3 === [cmemrchrErr0REQUIRES_VIOLATION, cmemrchrErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-03 05:37:31,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1884282364, now seen corresponding path program 1 times [2018-12-03 05:37:31,917 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:37:31,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:31,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:31,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:31,918 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:37:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:32,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 05:37:32,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-03 05:37:32,012 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 05:37:32,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 05:37:32,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 05:37:32,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-12-03 05:37:32,012 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2018-12-03 05:37:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:37:32,113 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2018-12-03 05:37:32,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 05:37:32,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-12-03 05:37:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:37:32,114 INFO L225 Difference]: With dead ends: 50 [2018-12-03 05:37:32,114 INFO L226 Difference]: Without dead ends: 50 [2018-12-03 05:37:32,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-12-03 05:37:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-03 05:37:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2018-12-03 05:37:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-03 05:37:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-12-03 05:37:32,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2018-12-03 05:37:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:37:32,117 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-12-03 05:37:32,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 05:37:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-12-03 05:37:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-03 05:37:32,118 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:37:32,118 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:37:32,118 INFO L423 AbstractCegarLoop]: === Iteration 4 === [cmemrchrErr0REQUIRES_VIOLATION, cmemrchrErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-03 05:37:32,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1638167589, now seen corresponding path program 1 times [2018-12-03 05:37:32,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:37:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:32,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:32,119 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:37:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:32,144 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 05:37:32,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 05:37:32,144 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 05:37:32,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 05:37:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 05:37:32,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 05:37:32,145 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-12-03 05:37:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:37:32,167 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-12-03 05:37:32,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 05:37:32,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-03 05:37:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:37:32,169 INFO L225 Difference]: With dead ends: 38 [2018-12-03 05:37:32,169 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 05:37:32,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-03 05:37:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 05:37:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2018-12-03 05:37:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-03 05:37:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-12-03 05:37:32,177 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2018-12-03 05:37:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:37:32,177 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-12-03 05:37:32,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 05:37:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-12-03 05:37:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-03 05:37:32,179 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:37:32,179 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:37:32,179 INFO L423 AbstractCegarLoop]: === Iteration 5 === [cmemrchrErr0REQUIRES_VIOLATION, cmemrchrErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-03 05:37:32,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:32,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1245140579, now seen corresponding path program 1 times [2018-12-03 05:37:32,179 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:37:32,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:32,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:32,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:32,180 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:37:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:32,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 05:37:32,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 05:37:32,210 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 05:37:32,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 05:37:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 05:37:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 05:37:32,211 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2018-12-03 05:37:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:37:32,230 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-12-03 05:37:32,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 05:37:32,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-12-03 05:37:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:37:32,231 INFO L225 Difference]: With dead ends: 30 [2018-12-03 05:37:32,231 INFO L226 Difference]: Without dead ends: 22 [2018-12-03 05:37:32,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 05:37:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-03 05:37:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-12-03 05:37:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-03 05:37:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-12-03 05:37:32,233 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-12-03 05:37:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:37:32,233 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-12-03 05:37:32,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 05:37:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-12-03 05:37:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-03 05:37:32,233 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:37:32,233 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:37:32,233 INFO L423 AbstractCegarLoop]: === Iteration 6 === [cmemrchrErr0REQUIRES_VIOLATION, cmemrchrErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-03 05:37:32,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:32,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1207598408, now seen corresponding path program 1 times [2018-12-03 05:37:32,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:37:32,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:32,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:32,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:32,235 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:37:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:32,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 05:37:32,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-12-03 05:37:32,365 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 05:37:32,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 05:37:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 05:37:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-12-03 05:37:32,366 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-12-03 05:37:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:37:32,497 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-12-03 05:37:32,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 05:37:32,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-12-03 05:37:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:37:32,498 INFO L225 Difference]: With dead ends: 29 [2018-12-03 05:37:32,498 INFO L226 Difference]: Without dead ends: 20 [2018-12-03 05:37:32,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-12-03 05:37:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-03 05:37:32,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-03 05:37:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-03 05:37:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-03 05:37:32,500 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2018-12-03 05:37:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:37:32,500 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-03 05:37:32,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 05:37:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-03 05:37:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-03 05:37:32,500 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:37:32,500 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:37:32,501 INFO L423 AbstractCegarLoop]: === Iteration 7 === [cmemrchrErr0REQUIRES_VIOLATION, cmemrchrErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-03 05:37:32,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:32,501 INFO L82 PathProgramCache]: Analyzing trace with hash -949432970, now seen corresponding path program 1 times [2018-12-03 05:37:32,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:37:32,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:32,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:32,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:32,502 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:37:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:32,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 05:37:32,630 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 05:37:32,631 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-03 05:37:32,632 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [5], [9], [10], [12], [16], [18], [23], [35], [38], [46], [48], [53], [54], [55], [57] [2018-12-03 05:37:32,653 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 05:37:32,653 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 05:37:32,746 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 05:37:32,747 INFO L272 AbstractInterpreter]: Visited 18 different actions 23 times. Merged at 5 different actions 5 times. Never widened. Performed 176 root evaluator evaluations with a maximum evaluation depth of 5. Performed 176 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-12-03 05:37:32,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:32,756 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 05:37:32,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 05:37:32,757 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 05:37:32,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:32,763 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 05:37:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:32,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 05:37:32,844 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 [2018-12-03 05:37:32,845 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 05:37:32,850 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 05:37:32,851 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2018-12-03 05:37:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:33,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 05:37:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:33,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 05:37:33,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 30 [2018-12-03 05:37:33,374 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 05:37:33,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 05:37:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 05:37:33,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2018-12-03 05:37:33,375 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 22 states. [2018-12-03 05:37:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:37:33,692 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-12-03 05:37:33,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 05:37:33,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2018-12-03 05:37:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:37:33,693 INFO L225 Difference]: With dead ends: 26 [2018-12-03 05:37:33,693 INFO L226 Difference]: Without dead ends: 26 [2018-12-03 05:37:33,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2018-12-03 05:37:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-03 05:37:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-03 05:37:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-03 05:37:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-03 05:37:33,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2018-12-03 05:37:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:37:33,695 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-03 05:37:33,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 05:37:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-03 05:37:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-03 05:37:33,695 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:37:33,695 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:37:33,696 INFO L423 AbstractCegarLoop]: === Iteration 8 === [cmemrchrErr0REQUIRES_VIOLATION, cmemrchrErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-03 05:37:33,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:37:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 837515588, now seen corresponding path program 2 times [2018-12-03 05:37:33,696 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:37:33,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:33,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:37:33,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:37:33,697 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:37:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:37:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:33,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 05:37:33,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 05:37:33,842 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 05:37:33,842 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 05:37:33,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 05:37:33,842 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 05:37:33,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 05:37:33,848 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 05:37:33,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 05:37:33,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 05:37:33,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 05:37:33,868 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 [2018-12-03 05:37:33,868 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 05:37:33,870 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 05:37:33,870 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-03 05:37:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:34,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 05:37:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:37:34,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 05:37:34,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-03 05:37:34,706 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 05:37:34,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-03 05:37:34,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-03 05:37:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 05:37:34,707 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 24 states. [2018-12-03 05:37:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:37:35,668 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-03 05:37:35,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 05:37:35,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-12-03 05:37:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:37:35,668 INFO L225 Difference]: With dead ends: 30 [2018-12-03 05:37:35,668 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 05:37:35,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=371, Invalid=2179, Unknown=0, NotChecked=0, Total=2550 [2018-12-03 05:37:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 05:37:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 05:37:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 05:37:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 05:37:35,670 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-12-03 05:37:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:37:35,670 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 05:37:35,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-03 05:37:35,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 05:37:35,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 05:37:35,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 05:37:35 BoogieIcfgContainer [2018-12-03 05:37:35,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 05:37:35,674 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 05:37:35,674 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 05:37:35,674 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 05:37:35,674 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:37:31" (3/4) ... [2018-12-03 05:37:35,676 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 05:37:35,680 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 05:37:35,680 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cmemrchr [2018-12-03 05:37:35,680 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 05:37:35,683 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2018-12-03 05:37:35,683 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-03 05:37:35,683 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 05:37:35,706 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6466efa4-5bd4-4df1-873d-01148bc46790/bin-2019/utaipan/witness.graphml [2018-12-03 05:37:35,706 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 05:37:35,707 INFO L168 Benchmark]: Toolchain (without parser) took 4857.06 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 272.6 MB). Free memory was 952.4 MB in the beginning and 1.2 GB in the end (delta: -284.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 05:37:35,708 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 05:37:35,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -127.9 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-12-03 05:37:35,708 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.79 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. [2018-12-03 05:37:35,709 INFO L168 Benchmark]: Boogie Preprocessor took 16.82 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. [2018-12-03 05:37:35,709 INFO L168 Benchmark]: RCFGBuilder took 160.35 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: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2018-12-03 05:37:35,709 INFO L168 Benchmark]: TraceAbstraction took 4354.86 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 176.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -187.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 05:37:35,709 INFO L168 Benchmark]: Witness Printer took 32.63 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. [2018-12-03 05:37:35,711 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 265.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -127.9 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.79 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 16.82 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 160.35 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: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4354.86 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 176.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -187.8 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 32.63 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 3 error locations. SAFE Result, 4.3s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 149 SDtfs, 219 SDslu, 701 SDs, 0 SdLazy, 580 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 46 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 181 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 47724 SizeOfPredicates, 24 NumberOfNonLiveVariables, 228 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 2/35 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...