./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_7.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/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 d2a1f90505878c0035f7701a954d17ca4375eb05 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:49:27,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:49:27,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:49:27,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:49:27,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:49:27,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:49:27,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:49:27,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:49:27,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:49:27,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:49:27,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:49:28,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:49:28,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:49:28,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:49:28,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:49:28,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:49:28,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:49:28,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:49:28,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:49:28,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:49:28,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:49:28,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:49:28,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:49:28,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:49:28,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:49:28,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:49:28,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:49:28,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:49:28,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:49:28,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:49:28,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:49:28,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:49:28,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:49:28,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:49:28,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:49:28,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:49:28,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:49:28,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:49:28,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:49:28,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:49:28,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:49:28,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 12:49:28,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:49:28,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:49:28,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:49:28,074 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:49:28,075 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:49:28,075 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:49:28,075 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:49:28,076 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:49:28,076 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:49:28,076 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:49:28,077 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:49:28,077 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:49:28,077 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:49:28,078 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:49:28,078 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:49:28,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 12:49:28,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 12:49:28,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:49:28,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:49:28,081 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:49:28,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:49:28,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:49:28,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:49:28,082 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 12:49:28,082 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 12:49:28,082 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 12:49:28,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:49:28,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:49:28,083 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:49:28,083 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:49:28,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:49:28,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:49:28,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:49:28,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:49:28,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:49:28,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:49:28,085 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:49:28,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:49:28,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:49:28,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:49:28,086 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_dfcaf423-85d2-46a4-8421-419e76215d20/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2020-11-22 12:49:28,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:49:28,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:49:28,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:49:28,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:49:28,466 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:49:28,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_7.c [2020-11-22 12:49:28,550 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/data/9f2147471/2b71e6565c234bbaa7028656e58492ba/FLAG2e29ec9ad [2020-11-22 12:49:29,052 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:49:29,053 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/sv-benchmarks/c/locks/test_locks_7.c [2020-11-22 12:49:29,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/data/9f2147471/2b71e6565c234bbaa7028656e58492ba/FLAG2e29ec9ad [2020-11-22 12:49:29,422 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/data/9f2147471/2b71e6565c234bbaa7028656e58492ba [2020-11-22 12:49:29,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:49:29,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:49:29,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:29,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:49:29,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:49:29,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7114e33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29, skipping insertion in model container [2020-11-22 12:49:29,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:49:29,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:49:29,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:29,737 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:49:29,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:29,789 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:49:29,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29 WrapperNode [2020-11-22 12:49:29,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:29,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:29,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:49:29,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:49:29,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:29,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:49:29,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:49:29,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:49:29,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... [2020-11-22 12:49:29,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:49:29,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:49:29,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:49:29,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:49:29,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:49:30,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:49:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:49:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:49:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:49:30,773 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:49:30,773 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 12:49:30,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:30 BoogieIcfgContainer [2020-11-22 12:49:30,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:49:30,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:49:30,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:49:30,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:49:30,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:49:29" (1/3) ... [2020-11-22 12:49:30,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b76d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:30, skipping insertion in model container [2020-11-22 12:49:30,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:29" (2/3) ... [2020-11-22 12:49:30,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b76d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:30, skipping insertion in model container [2020-11-22 12:49:30,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:30" (3/3) ... [2020-11-22 12:49:30,787 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-11-22 12:49:30,801 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:49:30,807 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 12:49:30,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 12:49:30,842 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:49:30,842 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 12:49:30,842 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:49:30,842 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:49:30,842 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:49:30,843 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:49:30,843 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:49:30,843 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:49:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-22 12:49:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:49:30,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:30,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:49:30,868 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash 5514829, now seen corresponding path program 1 times [2020-11-22 12:49:30,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:30,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050326353] [2020-11-22 12:49:30,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:31,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050326353] [2020-11-22 12:49:31,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:31,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:49:31,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389701681] [2020-11-22 12:49:31,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:49:31,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:31,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:49:31,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:49:31,088 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-11-22 12:49:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:31,105 INFO L93 Difference]: Finished difference Result 23 states and 36 transitions. [2020-11-22 12:49:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:49:31,107 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-22 12:49:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:31,120 INFO L225 Difference]: With dead ends: 23 [2020-11-22 12:49:31,121 INFO L226 Difference]: Without dead ends: 22 [2020-11-22 12:49:31,124 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 [2020-11-22 12:49:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-22 12:49:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-22 12:49:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-22 12:49:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 35 transitions. [2020-11-22 12:49:31,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 35 transitions. Word has length 4 [2020-11-22 12:49:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:31,176 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 35 transitions. [2020-11-22 12:49:31,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:49:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 35 transitions. [2020-11-22 12:49:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:49:31,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:31,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:49:31,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:49:31,178 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash 166579390, now seen corresponding path program 1 times [2020-11-22 12:49:31,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:31,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461996225] [2020-11-22 12:49:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:31,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461996225] [2020-11-22 12:49:31,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:31,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:49:31,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886091484] [2020-11-22 12:49:31,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:31,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:31,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:31,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:31,279 INFO L87 Difference]: Start difference. First operand 22 states and 35 transitions. Second operand 3 states. [2020-11-22 12:49:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:31,287 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2020-11-22 12:49:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:31,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 12:49:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:31,289 INFO L225 Difference]: With dead ends: 21 [2020-11-22 12:49:31,289 INFO L226 Difference]: Without dead ends: 19 [2020-11-22 12:49:31,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-22 12:49:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-22 12:49:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 12:49:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 32 transitions. [2020-11-22 12:49:31,305 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 32 transitions. Word has length 5 [2020-11-22 12:49:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:31,305 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 32 transitions. [2020-11-22 12:49:31,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 32 transitions. [2020-11-22 12:49:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:49:31,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:31,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:49:31,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:49:31,309 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash 873444667, now seen corresponding path program 1 times [2020-11-22 12:49:31,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:31,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123998996] [2020-11-22 12:49:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:31,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123998996] [2020-11-22 12:49:31,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:31,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:49:31,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346026256] [2020-11-22 12:49:31,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:31,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:31,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:31,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:31,439 INFO L87 Difference]: Start difference. First operand 19 states and 32 transitions. Second operand 4 states. [2020-11-22 12:49:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:31,495 INFO L93 Difference]: Finished difference Result 35 states and 58 transitions. [2020-11-22 12:49:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:31,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 12:49:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:31,497 INFO L225 Difference]: With dead ends: 35 [2020-11-22 12:49:31,498 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 12:49:31,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 12:49:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2020-11-22 12:49:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 12:49:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 31 transitions. [2020-11-22 12:49:31,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 31 transitions. Word has length 6 [2020-11-22 12:49:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:31,505 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 31 transitions. [2020-11-22 12:49:31,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 31 transitions. [2020-11-22 12:49:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:49:31,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:31,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:31,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:49:31,507 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1307195221, now seen corresponding path program 1 times [2020-11-22 12:49:31,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:31,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263854824] [2020-11-22 12:49:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:31,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263854824] [2020-11-22 12:49:31,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:31,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:49:31,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877741056] [2020-11-22 12:49:31,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:31,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:31,614 INFO L87 Difference]: Start difference. First operand 19 states and 31 transitions. Second operand 4 states. [2020-11-22 12:49:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:31,647 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2020-11-22 12:49:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:31,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 12:49:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:31,650 INFO L225 Difference]: With dead ends: 33 [2020-11-22 12:49:31,650 INFO L226 Difference]: Without dead ends: 33 [2020-11-22 12:49:31,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-22 12:49:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2020-11-22 12:49:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 12:49:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2020-11-22 12:49:31,655 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 7 [2020-11-22 12:49:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:31,655 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2020-11-22 12:49:31,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2020-11-22 12:49:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:49:31,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:31,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:31,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:49:31,658 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1868560848, now seen corresponding path program 1 times [2020-11-22 12:49:31,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:31,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150947774] [2020-11-22 12:49:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:31,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150947774] [2020-11-22 12:49:31,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:31,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:49:31,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003456833] [2020-11-22 12:49:31,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:31,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:31,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:31,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:31,727 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand 4 states. [2020-11-22 12:49:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:31,770 INFO L93 Difference]: Finished difference Result 31 states and 48 transitions. [2020-11-22 12:49:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:31,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 12:49:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:31,773 INFO L225 Difference]: With dead ends: 31 [2020-11-22 12:49:31,773 INFO L226 Difference]: Without dead ends: 31 [2020-11-22 12:49:31,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-22 12:49:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2020-11-22 12:49:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 12:49:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2020-11-22 12:49:31,778 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 8 [2020-11-22 12:49:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:31,778 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2020-11-22 12:49:31,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2020-11-22 12:49:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 12:49:31,779 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:31,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:31,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:49:31,780 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2091026442, now seen corresponding path program 1 times [2020-11-22 12:49:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:31,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635449884] [2020-11-22 12:49:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635449884] [2020-11-22 12:49:31,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:31,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:49:31,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206034935] [2020-11-22 12:49:31,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:31,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:31,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:31,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:31,878 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand 4 states. [2020-11-22 12:49:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:31,918 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2020-11-22 12:49:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:31,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 12:49:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:31,925 INFO L225 Difference]: With dead ends: 29 [2020-11-22 12:49:31,925 INFO L226 Difference]: Without dead ends: 29 [2020-11-22 12:49:31,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-22 12:49:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-11-22 12:49:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 12:49:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2020-11-22 12:49:31,929 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 28 transitions. Word has length 9 [2020-11-22 12:49:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:31,930 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 28 transitions. [2020-11-22 12:49:31,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 28 transitions. [2020-11-22 12:49:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:49:31,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:31,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:31,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:49:31,932 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash 397525605, now seen corresponding path program 1 times [2020-11-22 12:49:31,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:31,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170206731] [2020-11-22 12:49:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:32,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170206731] [2020-11-22 12:49:32,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:32,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:49:32,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432171572] [2020-11-22 12:49:32,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:32,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:32,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:32,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:32,013 INFO L87 Difference]: Start difference. First operand 19 states and 28 transitions. Second operand 4 states. [2020-11-22 12:49:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:32,047 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2020-11-22 12:49:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:32,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-22 12:49:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:32,049 INFO L225 Difference]: With dead ends: 27 [2020-11-22 12:49:32,049 INFO L226 Difference]: Without dead ends: 27 [2020-11-22 12:49:32,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-22 12:49:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-11-22 12:49:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 12:49:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2020-11-22 12:49:32,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 10 [2020-11-22 12:49:32,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:32,056 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2020-11-22 12:49:32,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2020-11-22 12:49:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:49:32,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:32,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:32,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 12:49:32,058 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash -561392449, now seen corresponding path program 1 times [2020-11-22 12:49:32,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:32,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516952989] [2020-11-22 12:49:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:32,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516952989] [2020-11-22 12:49:32,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:32,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:49:32,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475471310] [2020-11-22 12:49:32,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:32,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:32,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:32,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:32,144 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand 4 states. [2020-11-22 12:49:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:32,174 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-11-22 12:49:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:32,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 12:49:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:32,175 INFO L225 Difference]: With dead ends: 25 [2020-11-22 12:49:32,176 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 12:49:32,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 12:49:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-11-22 12:49:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 12:49:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2020-11-22 12:49:32,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2020-11-22 12:49:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:32,180 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2020-11-22 12:49:32,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-11-22 12:49:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:49:32,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:32,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:32,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 12:49:32,182 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:49:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:32,182 INFO L82 PathProgramCache]: Analyzing trace with hash -223080710, now seen corresponding path program 1 times [2020-11-22 12:49:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:32,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110183299] [2020-11-22 12:49:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:32,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110183299] [2020-11-22 12:49:32,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:32,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:49:32,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629112679] [2020-11-22 12:49:32,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:32,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:32,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:32,270 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 4 states. [2020-11-22 12:49:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:32,326 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-11-22 12:49:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:32,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 12:49:32,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:32,330 INFO L225 Difference]: With dead ends: 19 [2020-11-22 12:49:32,330 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:49:32,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:49:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:49:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:49:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:49:32,331 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-11-22 12:49:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:32,332 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:49:32,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:49:32,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:49:32,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 12:49:32,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:49:32 BoogieIcfgContainer [2020-11-22 12:49:32,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:49:32,343 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:49:32,344 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:49:32,344 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:49:32,345 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:30" (3/4) ... [2020-11-22 12:49:32,349 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:49:32,371 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-22 12:49:32,371 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 12:49:32,373 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:49:32,376 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:49:32,479 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dfcaf423-85d2-46a4-8421-419e76215d20/bin/utaipan/witness.graphml [2020-11-22 12:49:32,484 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:49:32,487 INFO L168 Benchmark]: Toolchain (without parser) took 3058.37 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 72.6 MB in the beginning and 91.7 MB in the end (delta: -19.1 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:32,487 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 77.6 MB. Free memory was 37.3 MB in the beginning and 37.3 MB in the end (delta: 33.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:32,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.80 ms. Allocated memory is still 102.8 MB. Free memory was 72.6 MB in the beginning and 79.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:32,489 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.78 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 78.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:32,489 INFO L168 Benchmark]: Boogie Preprocessor took 50.64 ms. Allocated memory is still 102.8 MB. Free memory was 78.1 MB in the beginning and 77.1 MB in the end (delta: 970.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:32,490 INFO L168 Benchmark]: RCFGBuilder took 863.34 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 48.7 MB in the end (delta: 28.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:32,490 INFO L168 Benchmark]: TraceAbstraction took 1564.64 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 48.1 MB in the beginning and 95.6 MB in the end (delta: -47.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:32,491 INFO L168 Benchmark]: Witness Printer took 140.57 ms. Allocated memory is still 123.7 MB. Free memory was 95.6 MB in the beginning and 91.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:32,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 77.6 MB. Free memory was 37.3 MB in the beginning and 37.3 MB in the end (delta: 33.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.80 ms. Allocated memory is still 102.8 MB. Free memory was 72.6 MB in the beginning and 79.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.78 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 78.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.64 ms. Allocated memory is still 102.8 MB. Free memory was 78.1 MB in the beginning and 77.1 MB in the end (delta: 970.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 863.34 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 48.7 MB in the end (delta: 28.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1564.64 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 48.1 MB in the beginning and 95.6 MB in the end (delta: -47.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 140.57 ms. Allocated memory is still 123.7 MB. Free memory was 95.6 MB in the beginning and 91.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 183 SDslu, 257 SDs, 0 SdLazy, 63 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...