./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/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 10bdb405bd6bca2bddb8b686c44dad291e109402 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:29:09,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:29:09,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:29:10,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:29:10,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:29:10,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:29:10,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:29:10,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:29:10,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:29:10,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:29:10,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:29:10,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:29:10,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:29:10,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:29:10,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:29:10,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:29:10,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:29:10,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:29:10,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:29:10,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:29:10,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:29:10,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:29:10,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:29:10,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:29:10,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:29:10,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:29:10,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:29:10,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:29:10,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:29:10,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:29:10,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:29:10,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:29:10,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:29:10,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:29:10,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:29:10,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:29:10,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:29:10,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:29:10,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:29:10,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:29:10,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:29:10,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:29:10,179 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:29:10,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:29:10,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:29:10,181 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:29:10,181 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:29:10,182 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:29:10,182 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:29:10,182 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:29:10,183 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:29:10,183 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:29:10,184 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:29:10,184 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:29:10,185 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:29:10,185 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:29:10,185 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:29:10,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:29:10,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:29:10,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:29:10,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:29:10,188 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:29:10,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:29:10,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:29:10,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:29:10,189 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:29:10,189 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:29:10,189 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:29:10,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:29:10,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:29:10,192 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:29:10,192 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:29:10,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:29:10,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:29:10,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:29:10,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:29:10,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:29:10,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:29:10,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:29:10,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:29:10,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:29:10,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:29:10,196 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10bdb405bd6bca2bddb8b686c44dad291e109402 [2020-11-28 07:29:10,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:29:10,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:29:10,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:29:10,515 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:29:10,521 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:29:10,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-11-28 07:29:10,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/data/ab7041b04/bc3c8331c9a7483e9116361d8d47703a/FLAG74dc7efca [2020-11-28 07:29:11,196 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:29:11,197 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-11-28 07:29:11,220 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/data/ab7041b04/bc3c8331c9a7483e9116361d8d47703a/FLAG74dc7efca [2020-11-28 07:29:11,468 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/data/ab7041b04/bc3c8331c9a7483e9116361d8d47703a [2020-11-28 07:29:11,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:29:11,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:29:11,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:29:11,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:29:11,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:29:11,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:29:11" (1/1) ... [2020-11-28 07:29:11,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48da246f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:11, skipping insertion in model container [2020-11-28 07:29:11,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:29:11" (1/1) ... [2020-11-28 07:29:11,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:29:11,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:29:11,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:29:11,893 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:29:11,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:29:12,010 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:29:12,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12 WrapperNode [2020-11-28 07:29:12,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:29:12,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:29:12,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:29:12,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:29:12,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:29:12,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:29:12,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:29:12,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:29:12,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... [2020-11-28 07:29:12,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:29:12,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:29:12,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:29:12,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:29:12,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/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 [2020-11-28 07:29:12,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:29:12,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:29:12,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:29:12,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:29:12,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:29:12,663 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:29:12,663 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-28 07:29:12,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:12 BoogieIcfgContainer [2020-11-28 07:29:12,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:29:12,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:29:12,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:29:12,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:29:12,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:29:11" (1/3) ... [2020-11-28 07:29:12,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc88380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:29:12, skipping insertion in model container [2020-11-28 07:29:12,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:12" (2/3) ... [2020-11-28 07:29:12,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc88380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:29:12, skipping insertion in model container [2020-11-28 07:29:12,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:12" (3/3) ... [2020-11-28 07:29:12,674 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca-1.i [2020-11-28 07:29:12,702 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:29:12,707 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 07:29:12,721 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 07:29:12,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:29:12,749 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:29:12,750 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:29:12,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:29:12,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:29:12,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:29:12,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:29:12,751 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:29:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-28 07:29:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:29:12,767 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:12,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:29:12,768 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:29:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2609821, now seen corresponding path program 1 times [2020-11-28 07:29:12,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:12,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835834976] [2020-11-28 07:29:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:12,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835834976] [2020-11-28 07:29:12,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:12,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:29:12,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658876992] [2020-11-28 07:29:12,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:29:12,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:13,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:29:13,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:29:13,018 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 5 states. [2020-11-28 07:29:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:13,128 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-28 07:29:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:29:13,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-28 07:29:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:13,146 INFO L225 Difference]: With dead ends: 11 [2020-11-28 07:29:13,150 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 07:29:13,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:29:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 07:29:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-11-28 07:29:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-28 07:29:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-28 07:29:13,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2020-11-28 07:29:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:13,189 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-28 07:29:13,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:29:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-28 07:29:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:29:13,191 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:13,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:29:13,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:29:13,191 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:29:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2609822, now seen corresponding path program 1 times [2020-11-28 07:29:13,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:13,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336805982] [2020-11-28 07:29:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:13,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336805982] [2020-11-28 07:29:13,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:13,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:29:13,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463241939] [2020-11-28 07:29:13,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:29:13,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:13,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:29:13,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:29:13,355 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2020-11-28 07:29:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:13,429 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-28 07:29:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:29:13,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-28 07:29:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:13,431 INFO L225 Difference]: With dead ends: 11 [2020-11-28 07:29:13,431 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:29:13,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:29:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:29:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:29:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:29:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 07:29:13,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2020-11-28 07:29:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:13,435 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 07:29:13,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:29:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-28 07:29:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:29:13,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:13,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:29:13,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:29:13,436 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:29:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2629898, now seen corresponding path program 1 times [2020-11-28 07:29:13,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:13,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69084927] [2020-11-28 07:29:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:13,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69084927] [2020-11-28 07:29:13,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:13,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:13,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806960766] [2020-11-28 07:29:13,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:13,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:13,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:13,560 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2020-11-28 07:29:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:13,569 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-11-28 07:29:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:13,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:29:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:13,571 INFO L225 Difference]: With dead ends: 11 [2020-11-28 07:29:13,571 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:29:13,571 INFO L677 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 [2020-11-28 07:29:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:29:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:29:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:29:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-28 07:29:13,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-11-28 07:29:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:13,574 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-28 07:29:13,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-28 07:29:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:29:13,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:13,575 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-28 07:29:13,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:29:13,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:29:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash 440602860, now seen corresponding path program 1 times [2020-11-28 07:29:13,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:13,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690435871] [2020-11-28 07:29:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:13,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690435871] [2020-11-28 07:29:13,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499241687] [2020-11-28 07:29:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-28 07:29:13,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:14,026 INFO L384 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 [2020-11-28 07:29:14,027 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:29:14,034 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:29:14,034 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:29:14,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-28 07:29:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:14,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:14,450 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-11-28 07:29:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:14,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666693583] [2020-11-28 07:29:14,591 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:29:14,591 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:14,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:14,602 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:14,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:15,425 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-11-28 07:29:15,619 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:15,927 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-11-28 07:29:16,182 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-28 07:29:16,662 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2020-11-28 07:29:16,974 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-28 07:29:17,087 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:17,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:17,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2020-11-28 07:29:17,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570583195] [2020-11-28 07:29:17,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-28 07:29:17,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:17,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-28 07:29:17,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-11-28 07:29:17,091 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2020-11-28 07:29:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:17,311 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-11-28 07:29:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:29:17,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 7 [2020-11-28 07:29:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:17,312 INFO L225 Difference]: With dead ends: 14 [2020-11-28 07:29:17,312 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:29:17,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-11-28 07:29:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:29:17,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-28 07:29:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 07:29:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-28 07:29:17,316 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2020-11-28 07:29:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:17,317 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-28 07:29:17,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-28 07:29:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-28 07:29:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:29:17,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:17,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:17,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-11-28 07:29:17,539 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:29:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:17,540 INFO L82 PathProgramCache]: Analyzing trace with hash 440601794, now seen corresponding path program 1 times [2020-11-28 07:29:17,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:17,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657118770] [2020-11-28 07:29:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657118770] [2020-11-28 07:29:17,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:17,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:17,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148336784] [2020-11-28 07:29:17,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:29:17,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:29:17,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:29:17,646 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-11-28 07:29:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:17,665 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-28 07:29:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:29:17,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:29:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:17,666 INFO L225 Difference]: With dead ends: 13 [2020-11-28 07:29:17,667 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:29:17,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:29:17,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:29:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:29:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:29:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-28 07:29:17,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2020-11-28 07:29:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:17,669 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-28 07:29:17,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:29:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-28 07:29:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:29:17,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:17,670 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2020-11-28 07:29:17,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-28 07:29:17,671 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:29:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:17,671 INFO L82 PathProgramCache]: Analyzing trace with hash 580552670, now seen corresponding path program 2 times [2020-11-28 07:29:17,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:17,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890173488] [2020-11-28 07:29:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:17,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890173488] [2020-11-28 07:29:17,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906432455] [2020-11-28 07:29:17,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:17,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 07:29:17,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:29:17,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-28 07:29:17,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:18,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:18,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115223328] [2020-11-28 07:29:18,977 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:29:18,977 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:18,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:18,978 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:18,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:19,402 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:19,805 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-11-28 07:29:20,246 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-11-28 07:29:20,642 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-28 07:29:20,763 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:20,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:20,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2020-11-28 07:29:20,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412347606] [2020-11-28 07:29:20,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-28 07:29:20,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:20,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-28 07:29:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2020-11-28 07:29:20,766 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 26 states. [2020-11-28 07:29:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:21,886 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-28 07:29:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 07:29:21,887 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 10 [2020-11-28 07:29:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:21,888 INFO L225 Difference]: With dead ends: 20 [2020-11-28 07:29:21,888 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 07:29:21,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2020-11-28 07:29:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 07:29:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-28 07:29:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:29:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-11-28 07:29:21,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2020-11-28 07:29:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:21,892 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-11-28 07:29:21,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-28 07:29:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-11-28 07:29:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:29:21,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:21,896 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2020-11-28 07:29:22,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-28 07:29:22,097 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:29:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1511687788, now seen corresponding path program 3 times [2020-11-28 07:29:22,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:22,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105429238] [2020-11-28 07:29:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:22,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105429238] [2020-11-28 07:29:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617139060] [2020-11-28 07:29:22,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:22,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:29:22,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:29:22,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 75 conjunts are in the unsatisfiable core [2020-11-28 07:29:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:23,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:24,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722066522] [2020-11-28 07:29:24,297 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:29:24,298 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:24,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:24,298 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:24,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:24,853 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:25,304 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-11-28 07:29:25,732 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-11-28 07:29:26,025 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-28 07:29:26,153 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:26,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:26,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2020-11-28 07:29:26,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814506423] [2020-11-28 07:29:26,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-28 07:29:26,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-28 07:29:26,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2020-11-28 07:29:26,156 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 44 states. [2020-11-28 07:29:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:27,590 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-28 07:29:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-28 07:29:27,591 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 19 [2020-11-28 07:29:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:27,591 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:29:27,591 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:29:27,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=469, Invalid=4087, Unknown=0, NotChecked=0, Total=4556 [2020-11-28 07:29:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:29:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:29:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:29:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:29:27,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-28 07:29:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:27,594 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:29:27,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-28 07:29:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:29:27,594 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:29:27,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-28 07:29:27,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:29:27 BoogieIcfgContainer [2020-11-28 07:29:27,801 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:29:27,802 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:29:27,802 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:29:27,802 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:29:27,802 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:12" (3/4) ... [2020-11-28 07:29:27,805 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:29:27,813 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-28 07:29:27,813 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-28 07:29:27,813 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:29:27,851 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d263289c-8c40-4372-8909-03e0776b5d68/bin/utaipan/witness.graphml [2020-11-28 07:29:27,851 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:29:27,852 INFO L168 Benchmark]: Toolchain (without parser) took 16380.82 ms. Allocated memory was 94.4 MB in the beginning and 249.6 MB in the end (delta: 155.2 MB). Free memory was 63.2 MB in the beginning and 111.7 MB in the end (delta: -48.5 MB). Peak memory consumption was 106.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:27,852 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 52.9 MB in the beginning and 52.8 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:29:27,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 531.13 ms. Allocated memory is still 94.4 MB. Free memory was 63.0 MB in the beginning and 61.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:27,853 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.62 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 59.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:27,854 INFO L168 Benchmark]: Boogie Preprocessor took 25.04 ms. Allocated memory is still 94.4 MB. Free memory was 59.7 MB in the beginning and 58.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:29:27,854 INFO L168 Benchmark]: RCFGBuilder took 573.61 ms. Allocated memory is still 94.4 MB. Free memory was 58.2 MB in the beginning and 36.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:27,855 INFO L168 Benchmark]: TraceAbstraction took 15134.35 ms. Allocated memory was 94.4 MB in the beginning and 249.6 MB in the end (delta: 155.2 MB). Free memory was 35.7 MB in the beginning and 113.4 MB in the end (delta: -77.7 MB). Peak memory consumption was 79.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:27,855 INFO L168 Benchmark]: Witness Printer took 49.28 ms. Allocated memory is still 249.6 MB. Free memory was 113.4 MB in the beginning and 111.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:27,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 52.9 MB in the beginning and 52.8 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 531.13 ms. Allocated memory is still 94.4 MB. Free memory was 63.0 MB in the beginning and 61.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.62 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 59.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.04 ms. Allocated memory is still 94.4 MB. Free memory was 59.7 MB in the beginning and 58.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 573.61 ms. Allocated memory is still 94.4 MB. Free memory was 58.2 MB in the beginning and 36.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15134.35 ms. Allocated memory was 94.4 MB in the beginning and 249.6 MB in the end (delta: 155.2 MB). Free memory was 35.7 MB in the beginning and 113.4 MB in the end (delta: -77.7 MB). Peak memory consumption was 79.6 MB. Max. memory is 16.1 GB. * Witness Printer took 49.28 ms. Allocated memory is still 249.6 MB. Free memory was 113.4 MB in the beginning and 111.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 523]: 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 1 procedures, 11 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.0s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 27 SDslu, 50 SDs, 0 SdLazy, 685 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 27078 SizeOfPredicates, 38 NumberOfNonLiveVariables, 318 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 15/147 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...