./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.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_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/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 50bdaf600d03af0a677a59daf6a875dbe69c10b2 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:08:13,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:08:13,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:08:14,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:08:14,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:08:14,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:08:14,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:08:14,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:08:14,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:08:14,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:08:14,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:08:14,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:08:14,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:08:14,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:08:14,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:08:14,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:08:14,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:08:14,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:08:14,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:08:14,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:08:14,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:08:14,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:08:14,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:08:14,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:08:14,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:08:14,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:08:14,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:08:14,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:08:14,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:08:14,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:08:14,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:08:14,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:08:14,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:08:14,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:08:14,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:08:14,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:08:14,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:08:14,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:08:14,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:08:14,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:08:14,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:08:14,124 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:08:14,174 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:08:14,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:08:14,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:08:14,176 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:08:14,176 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:08:14,176 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:08:14,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:08:14,177 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:08:14,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:08:14,178 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:08:14,179 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:08:14,179 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:08:14,180 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:08:14,180 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:08:14,180 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:08:14,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:08:14,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:08:14,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:08:14,182 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:08:14,182 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:08:14,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:08:14,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:08:14,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:08:14,183 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:08:14,184 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:08:14,184 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:08:14,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:08:14,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:08:14,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:08:14,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:08:14,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:08:14,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:08:14,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:08:14,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:08:14,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:08:14,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:08:14,190 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:08:14,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:08:14,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:08:14,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:08:14,191 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_5be898bb-0b59-414c-afa4-fb176c7f031a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50bdaf600d03af0a677a59daf6a875dbe69c10b2 [2020-11-30 02:08:14,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:08:14,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:08:14,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:08:14,543 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:08:14,544 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:08:14,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-11-30 02:08:14,618 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/data/b798d068c/2d67766c91a4437394ff32302bbf4f9f/FLAG066b168f0 [2020-11-30 02:08:15,317 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:08:15,322 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-11-30 02:08:15,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/data/b798d068c/2d67766c91a4437394ff32302bbf4f9f/FLAG066b168f0 [2020-11-30 02:08:15,516 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/data/b798d068c/2d67766c91a4437394ff32302bbf4f9f [2020-11-30 02:08:15,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:08:15,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:08:15,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:08:15,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:08:15,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:08:15,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:08:15" (1/1) ... [2020-11-30 02:08:15,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d35287a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:15, skipping insertion in model container [2020-11-30 02:08:15,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:08:15" (1/1) ... [2020-11-30 02:08:15,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:08:15,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:08:16,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:08:16,112 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:08:16,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:08:16,214 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:08:16,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16 WrapperNode [2020-11-30 02:08:16,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:08:16,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:08:16,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:08:16,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:08:16,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:08:16,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:08:16,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:08:16,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:08:16,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... [2020-11-30 02:08:16,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:08:16,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:08:16,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:08:16,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:08:16,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/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 [2020-11-30 02:08:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:08:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:08:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:08:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:08:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:08:16,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:08:16,957 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:08:16,957 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 02:08:16,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:08:16 BoogieIcfgContainer [2020-11-30 02:08:16,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:08:16,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:08:16,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:08:16,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:08:16,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:08:15" (1/3) ... [2020-11-30 02:08:16,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282a0e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:08:16, skipping insertion in model container [2020-11-30 02:08:16,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:08:16" (2/3) ... [2020-11-30 02:08:16,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282a0e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:08:16, skipping insertion in model container [2020-11-30 02:08:16,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:08:16" (3/3) ... [2020-11-30 02:08:16,975 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2020-11-30 02:08:16,989 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:08:16,994 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-30 02:08:17,009 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-30 02:08:17,034 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:08:17,034 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:08:17,034 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:08:17,034 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:08:17,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:08:17,035 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:08:17,035 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:08:17,035 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:08:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-30 02:08:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:08:17,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:17,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:08:17,059 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash 104334, now seen corresponding path program 1 times [2020-11-30 02:08:17,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:17,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932354402] [2020-11-30 02:08:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:17,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932354402] [2020-11-30 02:08:17,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:08:17,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:08:17,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741575678] [2020-11-30 02:08:17,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:08:17,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:17,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:08:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:08:17,310 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-30 02:08:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:17,393 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-11-30 02:08:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:08:17,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 02:08:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:17,409 INFO L225 Difference]: With dead ends: 22 [2020-11-30 02:08:17,409 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 02:08:17,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:08:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 02:08:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 02:08:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 02:08:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-30 02:08:17,475 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 3 [2020-11-30 02:08:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:17,475 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-30 02:08:17,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:08:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-30 02:08:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:08:17,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:17,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:08:17,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:08:17,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash 104335, now seen corresponding path program 1 times [2020-11-30 02:08:17,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:17,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300979322] [2020-11-30 02:08:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:17,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300979322] [2020-11-30 02:08:17,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:08:17,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:08:17,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37217920] [2020-11-30 02:08:17,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:08:17,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:17,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:08:17,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:08:17,638 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-11-30 02:08:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:17,769 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-30 02:08:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:08:17,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-30 02:08:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:17,772 INFO L225 Difference]: With dead ends: 40 [2020-11-30 02:08:17,772 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 02:08:17,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:08:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 02:08:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2020-11-30 02:08:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 02:08:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-30 02:08:17,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 3 [2020-11-30 02:08:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:17,784 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-30 02:08:17,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:08:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-30 02:08:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:08:17,785 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:17,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:08:17,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:08:17,786 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash 106111, now seen corresponding path program 1 times [2020-11-30 02:08:17,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:17,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141886567] [2020-11-30 02:08:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:17,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141886567] [2020-11-30 02:08:17,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:08:17,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:08:17,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348613309] [2020-11-30 02:08:17,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:08:17,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:17,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:08:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:08:17,922 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-11-30 02:08:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:17,955 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-30 02:08:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:08:17,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 02:08:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:17,957 INFO L225 Difference]: With dead ends: 22 [2020-11-30 02:08:17,957 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 02:08:17,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:08:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 02:08:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 02:08:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:08:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-30 02:08:17,962 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2020-11-30 02:08:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:17,962 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-30 02:08:17,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:08:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-30 02:08:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:08:17,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:17,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:08:17,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:08:17,963 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:17,965 INFO L82 PathProgramCache]: Analyzing trace with hash 3290841, now seen corresponding path program 1 times [2020-11-30 02:08:17,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:17,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484400542] [2020-11-30 02:08:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:18,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484400542] [2020-11-30 02:08:18,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:08:18,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:08:18,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265917620] [2020-11-30 02:08:18,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:08:18,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:08:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:08:18,023 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2020-11-30 02:08:18,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:18,065 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-30 02:08:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:08:18,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:08:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:18,067 INFO L225 Difference]: With dead ends: 19 [2020-11-30 02:08:18,067 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 02:08:18,067 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 [2020-11-30 02:08:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 02:08:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-30 02:08:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 02:08:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-30 02:08:18,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-11-30 02:08:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:18,070 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-30 02:08:18,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:08:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-30 02:08:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:08:18,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:18,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:08:18,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:08:18,072 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:18,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:18,072 INFO L82 PathProgramCache]: Analyzing trace with hash 3290842, now seen corresponding path program 1 times [2020-11-30 02:08:18,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:18,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693038267] [2020-11-30 02:08:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:18,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693038267] [2020-11-30 02:08:18,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:08:18,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:08:18,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894603032] [2020-11-30 02:08:18,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:08:18,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:18,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:08:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:08:18,248 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-11-30 02:08:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:18,329 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-11-30 02:08:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:08:18,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-30 02:08:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:18,330 INFO L225 Difference]: With dead ends: 18 [2020-11-30 02:08:18,330 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 02:08:18,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:08:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 02:08:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 02:08:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 02:08:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-30 02:08:18,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2020-11-30 02:08:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:18,334 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-30 02:08:18,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:08:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-30 02:08:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:08:18,335 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:18,336 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-30 02:08:18,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:08:18,336 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash 100314532, now seen corresponding path program 1 times [2020-11-30 02:08:18,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:18,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977909014] [2020-11-30 02:08:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977909014] [2020-11-30 02:08:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78690295] [2020-11-30 02:08:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/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 [2020-11-30 02:08:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:08:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:08:18,619 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 [2020-11-30 02:08:18,619 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:08:18,629 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:08:18,630 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:08:18,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-30 02:08:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:18,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:08:18,781 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:08:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:18,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440028833] [2020-11-30 02:08:18,850 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-30 02:08:18,850 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:08:18,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:08:18,865 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:08:18,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:08:19,505 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:08:19,908 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-30 02:08:20,033 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:08:20,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:08:20,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-11-30 02:08:20,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56950728] [2020-11-30 02:08:20,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 02:08:20,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:20,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 02:08:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:08:20,036 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 11 states. [2020-11-30 02:08:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:20,286 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-11-30 02:08:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:08:20,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5 [2020-11-30 02:08:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:20,288 INFO L225 Difference]: With dead ends: 42 [2020-11-30 02:08:20,288 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 02:08:20,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:08:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 02:08:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 15. [2020-11-30 02:08:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 02:08:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-30 02:08:20,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2020-11-30 02:08:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:20,292 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-30 02:08:20,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 02:08:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-30 02:08:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:08:20,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:20,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:08:20,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 02:08:20,494 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash -746792725, now seen corresponding path program 1 times [2020-11-30 02:08:20,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:20,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906461862] [2020-11-30 02:08:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:20,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906461862] [2020-11-30 02:08:20,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:08:20,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:08:20,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038764704] [2020-11-30 02:08:20,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:08:20,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:20,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:08:20,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:08:20,580 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-30 02:08:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:20,606 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-30 02:08:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:08:20,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-30 02:08:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:20,607 INFO L225 Difference]: With dead ends: 14 [2020-11-30 02:08:20,607 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 02:08:20,607 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 [2020-11-30 02:08:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 02:08:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 02:08:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 02:08:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-30 02:08:20,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-11-30 02:08:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:20,610 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-30 02:08:20,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:08:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-30 02:08:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:08:20,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:20,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:08:20,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-30 02:08:20,611 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:20,612 INFO L82 PathProgramCache]: Analyzing trace with hash -407205654, now seen corresponding path program 1 times [2020-11-30 02:08:20,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:20,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061856949] [2020-11-30 02:08:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:20,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061856949] [2020-11-30 02:08:20,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:08:20,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 02:08:20,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257972405] [2020-11-30 02:08:20,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:08:20,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:20,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:08:20,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:08:20,772 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-11-30 02:08:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:20,913 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-30 02:08:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:08:20,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 02:08:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:20,914 INFO L225 Difference]: With dead ends: 17 [2020-11-30 02:08:20,914 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 02:08:20,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:08:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 02:08:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-30 02:08:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-30 02:08:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-30 02:08:20,916 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-11-30 02:08:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:20,917 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-30 02:08:20,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:08:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-30 02:08:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:08:20,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:20,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:08:20,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-30 02:08:20,918 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash -286393537, now seen corresponding path program 1 times [2020-11-30 02:08:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:20,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496153707] [2020-11-30 02:08:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:21,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496153707] [2020-11-30 02:08:21,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041341] [2020-11-30 02:08:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/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 [2020-11-30 02:08:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:21,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 02:08:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:08:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:21,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:08:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:21,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101320571] [2020-11-30 02:08:21,404 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:08:21,404 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:08:21,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:08:21,405 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:08:21,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:08:21,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:21,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:22,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:22,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:22,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:22,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:22,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:22,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:22,596 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-30 02:08:22,924 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-11-30 02:08:23,198 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-30 02:08:23,376 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-30 02:08:23,540 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-30 02:08:23,715 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-30 02:08:23,778 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:08:24,093 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-11-30 02:08:24,389 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-30 02:08:25,023 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-11-30 02:08:25,331 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-11-30 02:08:25,628 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-30 02:08:25,633 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:08:25,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:08:25,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-30 02:08:25,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374877582] [2020-11-30 02:08:25,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 02:08:25,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:25,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 02:08:25,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:08:25,636 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 12 states. [2020-11-30 02:08:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:25,954 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-30 02:08:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:08:25,954 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-11-30 02:08:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:25,955 INFO L225 Difference]: With dead ends: 25 [2020-11-30 02:08:25,955 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:08:25,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:08:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:08:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-11-30 02:08:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 02:08:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-30 02:08:25,958 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2020-11-30 02:08:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:25,958 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-30 02:08:25,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 02:08:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-30 02:08:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:08:25,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:08:25,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 02:08:26,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-30 02:08:26,159 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:08:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:08:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash 403880869, now seen corresponding path program 2 times [2020-11-30 02:08:26,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:08:26,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757421928] [2020-11-30 02:08:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:08:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:08:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:08:26,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757421928] [2020-11-30 02:08:26,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454665771] [2020-11-30 02:08:26,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/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 [2020-11-30 02:08:26,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 02:08:26,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:08:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-30 02:08:26,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:08:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:08:27,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:08:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:08:27,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435191830] [2020-11-30 02:08:27,434 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:08:27,435 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:08:27,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:08:27,435 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:08:27,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:08:27,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:27,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:28,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:28,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:28,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:28,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:28,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:28,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:08:28,756 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-11-30 02:08:29,425 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-30 02:08:29,475 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:08:29,790 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-11-30 02:08:30,182 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-30 02:08:30,591 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-11-30 02:08:30,880 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-11-30 02:08:31,164 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-30 02:08:31,165 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:08:31,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:08:31,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2020-11-30 02:08:31,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695373433] [2020-11-30 02:08:31,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-30 02:08:31,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:08:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-30 02:08:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-11-30 02:08:31,167 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 22 states. [2020-11-30 02:08:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:08:32,044 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-30 02:08:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:08:32,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2020-11-30 02:08:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:08:32,052 INFO L225 Difference]: With dead ends: 30 [2020-11-30 02:08:32,052 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:08:32,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 02:08:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:08:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:08:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:08:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:08:32,054 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-30 02:08:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:08:32,054 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:08:32,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-30 02:08:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:08:32,054 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:08:32,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:08:32,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:08:32 BoogieIcfgContainer [2020-11-30 02:08:32,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:08:32,269 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:08:32,269 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:08:32,269 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:08:32,269 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:08:16" (3/4) ... [2020-11-30 02:08:32,272 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:08:32,288 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-30 02:08:32,290 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 02:08:32,291 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:08:32,333 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5be898bb-0b59-414c-afa4-fb176c7f031a/bin/utaipan/witness.graphml [2020-11-30 02:08:32,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:08:32,334 INFO L168 Benchmark]: Toolchain (without parser) took 16813.83 ms. Allocated memory was 111.1 MB in the beginning and 201.3 MB in the end (delta: 90.2 MB). Free memory was 86.2 MB in the beginning and 138.1 MB in the end (delta: -52.0 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:08:32,335 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:08:32,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.69 ms. Allocated memory is still 111.1 MB. Free memory was 85.9 MB in the beginning and 75.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:08:32,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.99 ms. Allocated memory is still 111.1 MB. Free memory was 75.4 MB in the beginning and 73.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:08:32,336 INFO L168 Benchmark]: Boogie Preprocessor took 26.12 ms. Allocated memory is still 111.1 MB. Free memory was 73.7 MB in the beginning and 72.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:08:32,336 INFO L168 Benchmark]: RCFGBuilder took 658.64 ms. Allocated memory is still 111.1 MB. Free memory was 72.5 MB in the beginning and 48.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:08:32,337 INFO L168 Benchmark]: TraceAbstraction took 15306.32 ms. Allocated memory was 111.1 MB in the beginning and 201.3 MB in the end (delta: 90.2 MB). Free memory was 47.8 MB in the beginning and 140.6 MB in the end (delta: -92.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:08:32,337 INFO L168 Benchmark]: Witness Printer took 64.41 ms. Allocated memory is still 201.3 MB. Free memory was 140.6 MB in the beginning and 138.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:08:32,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 693.69 ms. Allocated memory is still 111.1 MB. Free memory was 85.9 MB in the beginning and 75.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.99 ms. Allocated memory is still 111.1 MB. Free memory was 75.4 MB in the beginning and 73.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.12 ms. Allocated memory is still 111.1 MB. Free memory was 73.7 MB in the beginning and 72.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 658.64 ms. Allocated memory is still 111.1 MB. Free memory was 72.5 MB in the beginning and 48.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15306.32 ms. Allocated memory was 111.1 MB in the beginning and 201.3 MB in the end (delta: 90.2 MB). Free memory was 47.8 MB in the beginning and 140.6 MB in the end (delta: -92.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 64.41 ms. Allocated memory is still 201.3 MB. Free memory was 140.6 MB in the beginning and 138.1 MB in the end (delta: 2.5 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: 535]: 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: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.2s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 360 SDslu, 175 SDs, 0 SdLazy, 453 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, 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, 10 MinimizatonAttempts, 51 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 113 ConstructedInterpolants, 12 QuantifiedInterpolants, 14073 SizeOfPredicates, 25 NumberOfNonLiveVariables, 229 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 11/37 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...