./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/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 279a162aa90145a7316b3266460570a8e3cad8e6 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/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 279a162aa90145a7316b3266460570a8e3cad8e6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:45:04,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:45:04,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:45:04,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:45:04,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:45:04,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:45:04,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:45:04,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:45:04,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:45:04,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:45:04,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:45:04,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:45:04,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:45:04,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:45:04,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:45:04,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:45:04,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:45:04,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:45:04,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:45:04,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:45:04,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:45:04,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:45:04,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:45:04,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:45:04,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:45:04,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:45:04,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:45:04,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:45:04,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:45:04,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:45:04,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:45:04,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:45:04,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:45:04,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:45:04,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:45:04,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:45:04,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:45:04,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:45:04,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:45:04,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:45:04,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:45:04,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 16:45:04,542 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:45:04,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:45:04,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:45:04,543 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:45:04,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:45:04,543 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:45:04,543 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:45:04,544 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:45:04,544 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:45:04,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:45:04,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:45:04,544 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:45:04,544 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:45:04,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:45:04,544 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:45:04,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 16:45:04,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 16:45:04,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:45:04,545 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:45:04,546 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 16:45:04,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:45:04,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:45:04,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:45:04,546 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 16:45:04,546 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 16:45:04,546 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 16:45:04,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:45:04,547 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:45:04,547 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:45:04,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:45:04,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:45:04,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:45:04,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:45:04,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:45:04,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:45:04,548 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:45:04,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:45:04,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:45:04,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:45:04,548 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_8da751a7-8777-4290-8cc0-7e9860af50cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-12-09 16:45:04,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:45:04,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:45:04,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:45:04,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:45:04,768 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:45:04,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-12-09 16:45:04,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data/47147f7f7/c714c78245df4db091f57379ddd1a52c/FLAGf4abbce6b [2020-12-09 16:45:05,210 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:45:05,210 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-12-09 16:45:05,219 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data/47147f7f7/c714c78245df4db091f57379ddd1a52c/FLAGf4abbce6b [2020-12-09 16:45:05,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data/47147f7f7/c714c78245df4db091f57379ddd1a52c [2020-12-09 16:45:05,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:45:05,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:45:05,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:45:05,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:45:05,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:45:05,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ebd2f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05, skipping insertion in model container [2020-12-09 16:45:05,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:45:05,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:45:05,470 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2020-12-09 16:45:05,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:45:05,479 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:45:05,505 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2020-12-09 16:45:05,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:45:05,542 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:45:05,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05 WrapperNode [2020-12-09 16:45:05,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:45:05,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:45:05,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:45:05,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:45:05,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:45:05,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:45:05,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:45:05,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:45:05,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... [2020-12-09 16:45:05,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:45:05,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:45:05,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:45:05,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:45:05,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/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 [2020-12-09 16:45:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 16:45:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 16:45:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 16:45:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 16:45:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:45:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 16:45:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:45:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:45:05,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:45:05,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:45:05,920 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 16:45:05,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:05 BoogieIcfgContainer [2020-12-09 16:45:05,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:45:05,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:45:05,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:45:05,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:45:05,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:45:05" (1/3) ... [2020-12-09 16:45:05,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605e16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:45:05, skipping insertion in model container [2020-12-09 16:45:05,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:05" (2/3) ... [2020-12-09 16:45:05,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605e16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:45:05, skipping insertion in model container [2020-12-09 16:45:05,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:05" (3/3) ... [2020-12-09 16:45:05,928 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-12-09 16:45:05,939 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:45:05,942 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-09 16:45:05,949 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-09 16:45:05,965 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:45:05,965 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 16:45:05,965 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:45:05,965 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:45:05,966 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:45:05,966 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:45:05,966 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:45:05,966 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:45:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-09 16:45:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 16:45:05,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:05,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 16:45:05,982 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:05,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2769752, now seen corresponding path program 1 times [2020-12-09 16:45:05,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:05,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391573203] [2020-12-09 16:45:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391573203] [2020-12-09 16:45:06,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:45:06,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745106584] [2020-12-09 16:45:06,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 16:45:06,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 16:45:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:45:06,116 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-09 16:45:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,125 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-09 16:45:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 16:45:06,126 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 16:45:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,131 INFO L225 Difference]: With dead ends: 24 [2020-12-09 16:45:06,131 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 16:45:06,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:45:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 16:45:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 16:45:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 16:45:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 16:45:06,154 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2020-12-09 16:45:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,154 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 16:45:06,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 16:45:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 16:45:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:45:06,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:45:06,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:45:06,162 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash 85184151, now seen corresponding path program 1 times [2020-12-09 16:45:06,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153229692] [2020-12-09 16:45:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153229692] [2020-12-09 16:45:06,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 16:45:06,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462561348] [2020-12-09 16:45:06,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:45:06,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:45:06,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:06,206 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2020-12-09 16:45:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,236 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-09 16:45:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:45:06,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 16:45:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,237 INFO L225 Difference]: With dead ends: 35 [2020-12-09 16:45:06,237 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 16:45:06,238 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 [2020-12-09 16:45:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 16:45:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-09 16:45:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 16:45:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-09 16:45:06,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 5 [2020-12-09 16:45:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,243 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-09 16:45:06,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:45:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-09 16:45:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:45:06,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:45:06,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 16:45:06,244 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 85183265, now seen corresponding path program 1 times [2020-12-09 16:45:06,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006595274] [2020-12-09 16:45:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006595274] [2020-12-09 16:45:06,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:45:06,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531646430] [2020-12-09 16:45:06,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:45:06,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:45:06,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:06,274 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 3 states. [2020-12-09 16:45:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,289 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-09 16:45:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:45:06,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 16:45:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,290 INFO L225 Difference]: With dead ends: 32 [2020-12-09 16:45:06,290 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 16:45:06,290 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 [2020-12-09 16:45:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 16:45:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-12-09 16:45:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 16:45:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-09 16:45:06,293 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 5 [2020-12-09 16:45:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,293 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-09 16:45:06,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:45:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-09 16:45:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:45:06,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:45:06,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 16:45:06,293 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,294 INFO L82 PathProgramCache]: Analyzing trace with hash 85184580, now seen corresponding path program 1 times [2020-12-09 16:45:06,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76878907] [2020-12-09 16:45:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76878907] [2020-12-09 16:45:06,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:45:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152828778] [2020-12-09 16:45:06,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:45:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:45:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:06,325 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2020-12-09 16:45:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,343 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-09 16:45:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:45:06,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 16:45:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,344 INFO L225 Difference]: With dead ends: 22 [2020-12-09 16:45:06,344 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 16:45:06,344 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 [2020-12-09 16:45:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 16:45:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 16:45:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 16:45:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 16:45:06,346 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 5 [2020-12-09 16:45:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,346 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 16:45:06,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:45:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 16:45:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:45:06,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:45:06,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 16:45:06,347 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash 85184581, now seen corresponding path program 1 times [2020-12-09 16:45:06,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116704634] [2020-12-09 16:45:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116704634] [2020-12-09 16:45:06,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:45:06,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017545157] [2020-12-09 16:45:06,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:45:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:45:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:06,378 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2020-12-09 16:45:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,392 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-09 16:45:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:45:06,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 16:45:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,393 INFO L225 Difference]: With dead ends: 20 [2020-12-09 16:45:06,393 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 16:45:06,393 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 [2020-12-09 16:45:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 16:45:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 16:45:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 16:45:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 16:45:06,395 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 5 [2020-12-09 16:45:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,395 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 16:45:06,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:45:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 16:45:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:45:06,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,396 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:06,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 16:45:06,396 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1800659432, now seen corresponding path program 1 times [2020-12-09 16:45:06,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989540750] [2020-12-09 16:45:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989540750] [2020-12-09 16:45:06,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:45:06,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232109160] [2020-12-09 16:45:06,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:45:06,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:45:06,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:45:06,428 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-12-09 16:45:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,463 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-09 16:45:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:45:06,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 16:45:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,463 INFO L225 Difference]: With dead ends: 33 [2020-12-09 16:45:06,463 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 16:45:06,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:45:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 16:45:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2020-12-09 16:45:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 16:45:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-09 16:45:06,466 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2020-12-09 16:45:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,466 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-09 16:45:06,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:45:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-09 16:45:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:45:06,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,466 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:06,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 16:45:06,466 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1800660318, now seen corresponding path program 1 times [2020-12-09 16:45:06,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717557985] [2020-12-09 16:45:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717557985] [2020-12-09 16:45:06,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:45:06,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924683473] [2020-12-09 16:45:06,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:45:06,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:45:06,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:45:06,497 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-12-09 16:45:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,530 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-09 16:45:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:45:06,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 16:45:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,531 INFO L225 Difference]: With dead ends: 25 [2020-12-09 16:45:06,531 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 16:45:06,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:45:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 16:45:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-12-09 16:45:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 16:45:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-09 16:45:06,534 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2020-12-09 16:45:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,534 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-09 16:45:06,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:45:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-09 16:45:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:45:06,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,535 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:06,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 16:45:06,535 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1800660317, now seen corresponding path program 1 times [2020-12-09 16:45:06,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235762145] [2020-12-09 16:45:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235762145] [2020-12-09 16:45:06,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:45:06,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15548268] [2020-12-09 16:45:06,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:45:06,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:45:06,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:45:06,583 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-12-09 16:45:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,614 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-09 16:45:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:45:06,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 16:45:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,614 INFO L225 Difference]: With dead ends: 28 [2020-12-09 16:45:06,614 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 16:45:06,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:45:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 16:45:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-12-09 16:45:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 16:45:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-09 16:45:06,618 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2020-12-09 16:45:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,618 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-09 16:45:06,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:45:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-09 16:45:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 16:45:06,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,619 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:06,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 16:45:06,619 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash 437255107, now seen corresponding path program 1 times [2020-12-09 16:45:06,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714711948] [2020-12-09 16:45:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:06,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714711948] [2020-12-09 16:45:06,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:06,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 16:45:06,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473116700] [2020-12-09 16:45:06,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:45:06,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:45:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:45:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:45:06,667 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-12-09 16:45:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:06,710 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-12-09 16:45:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:45:06,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 16:45:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:06,711 INFO L225 Difference]: With dead ends: 26 [2020-12-09 16:45:06,711 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 16:45:06,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:45:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 16:45:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-09 16:45:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 16:45:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-09 16:45:06,714 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2020-12-09 16:45:06,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:06,714 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-09 16:45:06,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:45:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-09 16:45:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 16:45:06,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:06,714 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:06,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 16:45:06,715 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash -704469817, now seen corresponding path program 1 times [2020-12-09 16:45:06,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:45:06,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273251734] [2020-12-09 16:45:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:45:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:45:06,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:45:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:45:06,736 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:45:06,751 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 16:45:06,751 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:45:06,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 16:45:06,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:45:06 BoogieIcfgContainer [2020-12-09 16:45:06,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:45:06,769 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:45:06,769 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:45:06,769 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:45:06,769 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:05" (3/4) ... [2020-12-09 16:45:06,772 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 16:45:06,772 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:45:06,773 INFO L168 Benchmark]: Toolchain (without parser) took 1541.68 ms. Allocated memory was 136.3 MB in the beginning and 176.2 MB in the end (delta: 39.8 MB). Free memory was 99.0 MB in the beginning and 132.0 MB in the end (delta: -33.0 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-09 16:45:06,773 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 136.3 MB. Free memory is still 116.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:45:06,774 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.74 ms. Allocated memory is still 136.3 MB. Free memory was 98.7 MB in the beginning and 99.3 MB in the end (delta: -549.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:45:06,774 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.68 ms. Allocated memory is still 136.3 MB. Free memory was 98.8 MB in the beginning and 97.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:45:06,774 INFO L168 Benchmark]: Boogie Preprocessor took 19.58 ms. Allocated memory is still 136.3 MB. Free memory was 97.2 MB in the beginning and 96.3 MB in the end (delta: 936.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:45:06,775 INFO L168 Benchmark]: RCFGBuilder took 323.81 ms. Allocated memory is still 136.3 MB. Free memory was 95.8 MB in the beginning and 75.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 16:45:06,775 INFO L168 Benchmark]: TraceAbstraction took 845.44 ms. Allocated memory was 136.3 MB in the beginning and 176.2 MB in the end (delta: 39.8 MB). Free memory was 74.8 MB in the beginning and 132.0 MB in the end (delta: -57.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:45:06,775 INFO L168 Benchmark]: Witness Printer took 2.84 ms. Allocated memory is still 176.2 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:45:06,777 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 136.3 MB. Free memory is still 116.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.74 ms. Allocated memory is still 136.3 MB. Free memory was 98.7 MB in the beginning and 99.3 MB in the end (delta: -549.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.68 ms. Allocated memory is still 136.3 MB. Free memory was 98.8 MB in the beginning and 97.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.58 ms. Allocated memory is still 136.3 MB. Free memory was 97.2 MB in the beginning and 96.3 MB in the end (delta: 936.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 323.81 ms. Allocated memory is still 136.3 MB. Free memory was 95.8 MB in the beginning and 75.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 845.44 ms. Allocated memory was 136.3 MB in the beginning and 176.2 MB in the end (delta: 39.8 MB). Free memory was 74.8 MB in the beginning and 132.0 MB in the end (delta: -57.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.84 ms. Allocated memory is still 176.2 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 156 SDslu, 63 SDs, 0 SdLazy, 149 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, 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, 9 MinimizatonAttempts, 37 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 1835 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 8/8 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:45:08,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:45:08,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:45:08,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:45:08,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:45:08,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:45:08,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:45:08,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:45:08,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:45:08,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:45:08,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:45:08,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:45:08,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:45:08,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:45:08,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:45:08,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:45:08,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:45:08,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:45:08,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:45:08,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:45:08,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:45:08,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:45:08,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:45:08,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:45:08,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:45:08,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:45:08,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:45:08,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:45:08,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:45:08,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:45:08,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:45:08,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:45:08,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:45:08,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:45:08,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:45:08,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:45:08,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:45:08,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:45:08,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:45:08,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:45:08,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:45:08,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 16:45:08,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:45:08,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:45:08,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:45:08,526 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:45:08,526 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:45:08,526 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:45:08,527 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:45:08,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:45:08,527 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:45:08,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 16:45:08,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 16:45:08,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 16:45:08,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:45:08,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:45:08,529 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 16:45:08,529 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 16:45:08,529 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:45:08,529 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:45:08,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:45:08,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 16:45:08,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:45:08,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:45:08,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:45:08,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:45:08,530 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 16:45:08,530 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 16:45:08,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:45:08,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:45:08,530 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8da751a7-8777-4290-8cc0-7e9860af50cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-12-09 16:45:08,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:45:08,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:45:08,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:45:08,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:45:08,762 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:45:08,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-12-09 16:45:08,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data/8b7b751ba/093f6302b80e42c7b3738a751e9b446c/FLAGa3193e585 [2020-12-09 16:45:09,243 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:45:09,243 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-12-09 16:45:09,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data/8b7b751ba/093f6302b80e42c7b3738a751e9b446c/FLAGa3193e585 [2020-12-09 16:45:09,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/data/8b7b751ba/093f6302b80e42c7b3738a751e9b446c [2020-12-09 16:45:09,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:45:09,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:45:09,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:45:09,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:45:09,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:45:09,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70eaee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09, skipping insertion in model container [2020-12-09 16:45:09,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:45:09,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:45:09,512 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2020-12-09 16:45:09,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:45:09,530 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:45:09,569 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2020-12-09 16:45:09,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:45:09,625 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:45:09,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09 WrapperNode [2020-12-09 16:45:09,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:45:09,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:45:09,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:45:09,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:45:09,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:45:09,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:45:09,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:45:09,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:45:09,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... [2020-12-09 16:45:09,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:45:09,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:45:09,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:45:09,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:45:09,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/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 [2020-12-09 16:45:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 16:45:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 16:45:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 16:45:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:45:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 16:45:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 16:45:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 16:45:09,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:45:09,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:45:10,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:45:10,000 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 16:45:10,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:10 BoogieIcfgContainer [2020-12-09 16:45:10,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:45:10,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:45:10,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:45:10,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:45:10,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:45:09" (1/3) ... [2020-12-09 16:45:10,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0a4ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:45:10, skipping insertion in model container [2020-12-09 16:45:10,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:09" (2/3) ... [2020-12-09 16:45:10,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0a4ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:45:10, skipping insertion in model container [2020-12-09 16:45:10,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:10" (3/3) ... [2020-12-09 16:45:10,006 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-12-09 16:45:10,020 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:45:10,022 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-09 16:45:10,030 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-09 16:45:10,044 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:45:10,044 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 16:45:10,044 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:45:10,044 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:45:10,044 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:45:10,044 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:45:10,044 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:45:10,044 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:45:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-09 16:45:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:45:10,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:10,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:45:10,058 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:10,063 INFO L82 PathProgramCache]: Analyzing trace with hash 28698492, now seen corresponding path program 1 times [2020-12-09 16:45:10,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:10,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630884239] [2020-12-09 16:45:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:10,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 16:45:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:45:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:10,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:45:10,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630884239] [2020-12-09 16:45:10,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:10,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:45:10,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901920485] [2020-12-09 16:45:10,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:45:10,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:45:10,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:45:10,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:10,162 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-12-09 16:45:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:10,221 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-09 16:45:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:45:10,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 16:45:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:10,230 INFO L225 Difference]: With dead ends: 40 [2020-12-09 16:45:10,230 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 16:45:10,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 16:45:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-12-09 16:45:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 16:45:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-09 16:45:10,262 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 5 [2020-12-09 16:45:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:10,262 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-09 16:45:10,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:45:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-09 16:45:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:45:10,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:10,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:45:10,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 16:45:10,467 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:10,469 INFO L82 PathProgramCache]: Analyzing trace with hash 28698536, now seen corresponding path program 1 times [2020-12-09 16:45:10,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:10,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766188378] [2020-12-09 16:45:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 16:45:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:45:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:10,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:45:10,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766188378] [2020-12-09 16:45:10,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:10,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:45:10,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768903278] [2020-12-09 16:45:10,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:45:10,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:45:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:45:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:10,638 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2020-12-09 16:45:10,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:10,677 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-09 16:45:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:45:10,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 16:45:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:10,679 INFO L225 Difference]: With dead ends: 34 [2020-12-09 16:45:10,679 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 16:45:10,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 16:45:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-12-09 16:45:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 16:45:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-09 16:45:10,684 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 5 [2020-12-09 16:45:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:10,684 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-09 16:45:10,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:45:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-09 16:45:10,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:45:10,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:10,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:45:10,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 16:45:10,887 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:10,890 INFO L82 PathProgramCache]: Analyzing trace with hash 28699851, now seen corresponding path program 1 times [2020-12-09 16:45:10,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:10,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148303802] [2020-12-09 16:45:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 16:45:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:45:11,087 INFO L382 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 [2020-12-09 16:45:11,088 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:45:11,090 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:45:11,091 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:45:11,091 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 16:45:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:11,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:45:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148303802] [2020-12-09 16:45:11,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:11,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:45:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384589266] [2020-12-09 16:45:11,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:45:11,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:45:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:45:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:11,099 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2020-12-09 16:45:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:11,134 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-09 16:45:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:45:11,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 16:45:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:11,135 INFO L225 Difference]: With dead ends: 23 [2020-12-09 16:45:11,136 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 16:45:11,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 16:45:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 16:45:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 16:45:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-09 16:45:11,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 5 [2020-12-09 16:45:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:11,139 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-09 16:45:11,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:45:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-09 16:45:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:45:11,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:11,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:45:11,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 16:45:11,342 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:11,344 INFO L82 PathProgramCache]: Analyzing trace with hash 28699852, now seen corresponding path program 1 times [2020-12-09 16:45:11,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:11,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316625062] [2020-12-09 16:45:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:45:11,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:45:11,495 INFO L382 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 [2020-12-09 16:45:11,496 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:45:11,500 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:45:11,502 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:45:11,503 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 16:45:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:11,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:45:11,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316625062] [2020-12-09 16:45:11,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:11,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:45:11,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133319074] [2020-12-09 16:45:11,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:45:11,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:45:11,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:45:11,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:11,516 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2020-12-09 16:45:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:11,551 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-09 16:45:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:45:11,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 16:45:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:11,552 INFO L225 Difference]: With dead ends: 21 [2020-12-09 16:45:11,553 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 16:45:11,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:45:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 16:45:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 16:45:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 16:45:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-09 16:45:11,556 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 5 [2020-12-09 16:45:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:11,556 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-09 16:45:11,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:45:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-09 16:45:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:45:11,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:11,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:11,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 16:45:11,758 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:11,759 INFO L82 PathProgramCache]: Analyzing trace with hash -653129230, now seen corresponding path program 1 times [2020-12-09 16:45:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:11,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019880328] [2020-12-09 16:45:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 16:45:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:45:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:11,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:45:11,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019880328] [2020-12-09 16:45:11,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:11,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:45:11,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127197841] [2020-12-09 16:45:11,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:45:11,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:45:11,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:45:11,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:45:11,880 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-12-09 16:45:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:11,951 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-09 16:45:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:45:11,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 16:45:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:11,953 INFO L225 Difference]: With dead ends: 36 [2020-12-09 16:45:11,953 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 16:45:11,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:45:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 16:45:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2020-12-09 16:45:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 16:45:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 16:45:11,955 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-12-09 16:45:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:11,955 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 16:45:11,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:45:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 16:45:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:45:11,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:11,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:12,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 16:45:12,157 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash -653129186, now seen corresponding path program 1 times [2020-12-09 16:45:12,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:12,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916293569] [2020-12-09 16:45:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 16:45:12,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:45:12,255 INFO L382 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 [2020-12-09 16:45:12,255 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:45:12,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:45:12,257 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:45:12,257 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 16:45:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:12,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:45:12,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916293569] [2020-12-09 16:45:12,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:12,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:45:12,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866755404] [2020-12-09 16:45:12,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:45:12,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:45:12,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:45:12,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:45:12,270 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-12-09 16:45:12,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:12,356 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-09 16:45:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:45:12,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 16:45:12,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:12,357 INFO L225 Difference]: With dead ends: 27 [2020-12-09 16:45:12,357 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 16:45:12,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:45:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 16:45:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-09 16:45:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 16:45:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 16:45:12,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2020-12-09 16:45:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:12,362 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 16:45:12,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:45:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 16:45:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:45:12,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:12,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:12,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 16:45:12,564 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:12,566 INFO L82 PathProgramCache]: Analyzing trace with hash -653129185, now seen corresponding path program 1 times [2020-12-09 16:45:12,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:12,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215334199] [2020-12-09 16:45:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 16:45:12,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:45:12,665 INFO L382 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 [2020-12-09 16:45:12,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:45:12,670 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:45:12,671 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:45:12,671 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 16:45:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:12,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:45:12,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215334199] [2020-12-09 16:45:12,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:12,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:45:12,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699359543] [2020-12-09 16:45:12,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:45:12,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:45:12,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:45:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:45:12,696 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-12-09 16:45:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:12,765 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-09 16:45:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:45:12,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 16:45:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:12,766 INFO L225 Difference]: With dead ends: 31 [2020-12-09 16:45:12,766 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 16:45:12,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:45:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 16:45:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-12-09 16:45:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 16:45:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-09 16:45:12,768 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-12-09 16:45:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:12,769 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-09 16:45:12,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:45:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-09 16:45:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 16:45:12,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:12,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:12,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 16:45:12,971 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash -591922145, now seen corresponding path program 1 times [2020-12-09 16:45:12,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:12,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213033092] [2020-12-09 16:45:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:45:13,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 16:45:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:45:13,032 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2020-12-09 16:45:13,033 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:45:13,035 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:45:13,035 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:45:13,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 16:45:13,059 INFO L348 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-12-09 16:45:13,060 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2020-12-09 16:45:13,061 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:45:13,063 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:45:13,064 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:45:13,064 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:9 [2020-12-09 16:45:13,079 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 16:45:13,080 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:45:13,082 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:45:13,082 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:45:13,083 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-09 16:45:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:45:13,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:45:13,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213033092] [2020-12-09 16:45:13,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:45:13,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 16:45:13,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796377911] [2020-12-09 16:45:13,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:45:13,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:45:13,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:45:13,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:45:13,091 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-12-09 16:45:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:45:13,200 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-09 16:45:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:45:13,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 16:45:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:45:13,201 INFO L225 Difference]: With dead ends: 28 [2020-12-09 16:45:13,201 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 16:45:13,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:45:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 16:45:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-09 16:45:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 16:45:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-09 16:45:13,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12 [2020-12-09 16:45:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:45:13,204 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-09 16:45:13,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:45:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-09 16:45:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 16:45:13,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:45:13,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:45:13,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 16:45:13,406 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 16:45:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:45:13,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1187913323, now seen corresponding path program 1 times [2020-12-09 16:45:13,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:45:13,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184068930] [2020-12-09 16:45:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8da751a7-8777-4290-8cc0-7e9860af50cc/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 16:45:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:45:13,582 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:45:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:45:13,607 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:45:13,627 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 16:45:13,627 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:45:13,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 16:45:13,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:45:13 BoogieIcfgContainer [2020-12-09 16:45:13,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:45:13,861 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:45:13,861 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:45:13,861 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:45:13,861 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:10" (3/4) ... [2020-12-09 16:45:13,865 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 16:45:13,865 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:45:13,866 INFO L168 Benchmark]: Toolchain (without parser) took 4597.97 ms. Allocated memory was 48.2 MB in the beginning and 73.4 MB in the end (delta: 25.2 MB). Free memory was 25.1 MB in the beginning and 46.0 MB in the end (delta: -20.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-12-09 16:45:13,866 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 48.2 MB. Free memory was 31.5 MB in the beginning and 31.5 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:45:13,867 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.25 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 25.0 MB in the beginning and 31.9 MB in the end (delta: -6.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-12-09 16:45:13,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.42 ms. Allocated memory is still 60.8 MB. Free memory was 31.7 MB in the beginning and 29.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:45:13,868 INFO L168 Benchmark]: Boogie Preprocessor took 28.49 ms. Allocated memory is still 60.8 MB. Free memory was 29.9 MB in the beginning and 28.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:45:13,869 INFO L168 Benchmark]: RCFGBuilder took 307.54 ms. Allocated memory is still 60.8 MB. Free memory was 28.5 MB in the beginning and 26.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-12-09 16:45:13,869 INFO L168 Benchmark]: TraceAbstraction took 3857.92 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 26.1 MB in the beginning and 46.0 MB in the end (delta: -19.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:45:13,869 INFO L168 Benchmark]: Witness Printer took 4.07 ms. Allocated memory is still 73.4 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:45:13,872 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 48.2 MB. Free memory was 31.5 MB in the beginning and 31.5 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 357.25 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 25.0 MB in the beginning and 31.9 MB in the end (delta: -6.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.42 ms. Allocated memory is still 60.8 MB. Free memory was 31.7 MB in the beginning and 29.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.49 ms. Allocated memory is still 60.8 MB. Free memory was 29.9 MB in the beginning and 28.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 307.54 ms. Allocated memory is still 60.8 MB. Free memory was 28.5 MB in the beginning and 26.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3857.92 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 26.1 MB in the beginning and 46.0 MB in the end (delta: -19.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.07 ms. Allocated memory is still 73.4 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 176 SDslu, 58 SDs, 0 SdLazy, 179 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=1, 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, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1976 SizeOfPredicates, 16 NumberOfNonLiveVariables, 320 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 4/4 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...