./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.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_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/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 5a3019657b4c9b0e8c0aa3e888313d420fe28d28 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:32:03,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:32:03,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:32:03,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:32:03,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:32:03,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:32:03,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:32:03,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:32:03,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:32:03,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:32:03,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:32:03,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:32:03,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:32:04,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:32:04,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:32:04,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:32:04,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:32:04,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:32:04,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:32:04,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:32:04,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:32:04,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:32:04,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:32:04,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:32:04,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:32:04,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:32:04,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:32:04,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:32:04,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:32:04,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:32:04,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:32:04,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:32:04,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:32:04,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:32:04,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:32:04,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:32:04,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:32:04,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:32:04,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:32:04,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:32:04,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:32:04,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-03 12:32:04,062 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:32:04,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:32:04,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:32:04,064 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:32:04,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:32:04,064 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:32:04,064 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:32:04,064 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:32:04,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:32:04,065 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:32:04,065 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:32:04,065 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:32:04,066 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:32:04,066 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:32:04,066 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:32:04,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 12:32:04,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 12:32:04,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:32:04,068 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:32:04,068 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:32:04,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:32:04,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:32:04,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:32:04,069 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-03 12:32:04,069 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-03 12:32:04,069 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-03 12:32:04,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:32:04,069 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:32:04,070 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:32:04,070 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:32:04,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:32:04,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:32:04,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:32:04,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:32:04,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:32:04,071 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:32:04,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:32:04,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:32:04,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:32:04,072 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_5055150c-a392-413c-96de-9570ef38558a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a3019657b4c9b0e8c0aa3e888313d420fe28d28 [2020-12-03 12:32:04,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:32:04,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:32:04,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:32:04,334 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:32:04,334 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:32:04,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2020-12-03 12:32:04,426 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/data/7c31b38bd/57d6e4379c1e4baeba6b0cbc8426c81d/FLAGff091ef27 [2020-12-03 12:32:04,986 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:32:04,987 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2020-12-03 12:32:05,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/data/7c31b38bd/57d6e4379c1e4baeba6b0cbc8426c81d/FLAGff091ef27 [2020-12-03 12:32:05,288 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/data/7c31b38bd/57d6e4379c1e4baeba6b0cbc8426c81d [2020-12-03 12:32:05,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:32:05,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:32:05,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:05,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:32:05,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:32:05,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b4ea57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05, skipping insertion in model container [2020-12-03 12:32:05,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:32:05,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:32:05,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:05,674 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:32:05,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:05,778 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:32:05,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05 WrapperNode [2020-12-03 12:32:05,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:05,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:05,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:32:05,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:32:05,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:05,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:32:05,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:32:05,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:32:05,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... [2020-12-03 12:32:05,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:32:05,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:32:05,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:32:05,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:32:05,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/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 [2020-12-03 12:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-03 12:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:32:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:32:06,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:32:06,620 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-03 12:32:06,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:06 BoogieIcfgContainer [2020-12-03 12:32:06,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:32:06,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:32:06,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:32:06,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:32:06,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:32:05" (1/3) ... [2020-12-03 12:32:06,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1357c7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:06, skipping insertion in model container [2020-12-03 12:32:06,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:05" (2/3) ... [2020-12-03 12:32:06,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1357c7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:06, skipping insertion in model container [2020-12-03 12:32:06,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:06" (3/3) ... [2020-12-03 12:32:06,641 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2020-12-03 12:32:06,656 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:32:06,659 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2020-12-03 12:32:06,671 INFO L253 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2020-12-03 12:32:06,688 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:32:06,688 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-03 12:32:06,688 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:32:06,689 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:32:06,689 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:32:06,689 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:32:06,689 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:32:06,689 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:32:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-12-03 12:32:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:32:06,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:06,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:32:06,720 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:06,724 INFO L82 PathProgramCache]: Analyzing trace with hash 181214, now seen corresponding path program 1 times [2020-12-03 12:32:06,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:06,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397042987] [2020-12-03 12:32:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:06,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397042987] [2020-12-03 12:32:06,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:06,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:32:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732052244] [2020-12-03 12:32:06,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:32:06,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:32:06,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:06,923 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2020-12-03 12:32:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:07,002 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-12-03 12:32:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:32:07,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-03 12:32:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:07,012 INFO L225 Difference]: With dead ends: 50 [2020-12-03 12:32:07,013 INFO L226 Difference]: Without dead ends: 49 [2020-12-03 12:32:07,017 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 [2020-12-03 12:32:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-03 12:32:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-03 12:32:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 12:32:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-12-03 12:32:07,061 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 3 [2020-12-03 12:32:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:07,061 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-12-03 12:32:07,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:32:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-12-03 12:32:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:32:07,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:07,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:32:07,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:32:07,063 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 181215, now seen corresponding path program 1 times [2020-12-03 12:32:07,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:07,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419130908] [2020-12-03 12:32:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:07,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419130908] [2020-12-03 12:32:07,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:07,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:32:07,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552730631] [2020-12-03 12:32:07,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:32:07,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:07,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:32:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:32:07,203 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 4 states. [2020-12-03 12:32:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:07,390 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-12-03 12:32:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:32:07,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-12-03 12:32:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:07,395 INFO L225 Difference]: With dead ends: 95 [2020-12-03 12:32:07,395 INFO L226 Difference]: Without dead ends: 95 [2020-12-03 12:32:07,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:32:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-03 12:32:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 53. [2020-12-03 12:32:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-03 12:32:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-03 12:32:07,418 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 3 [2020-12-03 12:32:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:07,418 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-03 12:32:07,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:32:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-03 12:32:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:32:07,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:07,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:32:07,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:32:07,420 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 185719, now seen corresponding path program 1 times [2020-12-03 12:32:07,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:07,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341697780] [2020-12-03 12:32:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:07,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341697780] [2020-12-03 12:32:07,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:07,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:32:07,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788923759] [2020-12-03 12:32:07,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:32:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:32:07,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:07,501 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 3 states. [2020-12-03 12:32:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:07,560 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-12-03 12:32:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:32:07,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-03 12:32:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:07,562 INFO L225 Difference]: With dead ends: 51 [2020-12-03 12:32:07,562 INFO L226 Difference]: Without dead ends: 51 [2020-12-03 12:32:07,562 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 [2020-12-03 12:32:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-03 12:32:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-03 12:32:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-03 12:32:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-12-03 12:32:07,572 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 3 [2020-12-03 12:32:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:07,572 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-12-03 12:32:07,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:32:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-12-03 12:32:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:32:07,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:07,573 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-03 12:32:07,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:32:07,574 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 174273092, now seen corresponding path program 1 times [2020-12-03 12:32:07,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:07,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510864793] [2020-12-03 12:32:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:07,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510864793] [2020-12-03 12:32:07,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825072958] [2020-12-03 12:32:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 12:32:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:07,786 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 [2020-12-03 12:32:07,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:32:07,794 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:32:07,795 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:32:07,796 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-03 12:32:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:07,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:07,882 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:32:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:07,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301329800] [2020-12-03 12:32:07,945 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-03 12:32:07,946 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:07,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:07,956 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:07,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:08,601 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:08,921 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-12-03 12:32:08,995 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:32:08,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:08,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-12-03 12:32:08,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927039590] [2020-12-03 12:32:08,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-03 12:32:08,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-03 12:32:08,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:32:08,997 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 9 states. [2020-12-03 12:32:09,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:09,326 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2020-12-03 12:32:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:32:09,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-12-03 12:32:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:09,334 INFO L225 Difference]: With dead ends: 131 [2020-12-03 12:32:09,334 INFO L226 Difference]: Without dead ends: 131 [2020-12-03 12:32:09,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-12-03 12:32:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-03 12:32:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 45. [2020-12-03 12:32:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-03 12:32:09,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-12-03 12:32:09,351 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 5 [2020-12-03 12:32:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:09,352 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-12-03 12:32:09,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-03 12:32:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-12-03 12:32:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:32:09,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:09,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:32:09,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-12-03 12:32:09,576 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:09,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1241849616, now seen corresponding path program 1 times [2020-12-03 12:32:09,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:09,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023456523] [2020-12-03 12:32:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:09,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023456523] [2020-12-03 12:32:09,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:09,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:32:09,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939765904] [2020-12-03 12:32:09,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:32:09,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:32:09,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:32:09,650 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2020-12-03 12:32:09,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:09,725 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-03 12:32:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:32:09,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-03 12:32:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:09,726 INFO L225 Difference]: With dead ends: 42 [2020-12-03 12:32:09,727 INFO L226 Difference]: Without dead ends: 42 [2020-12-03 12:32:09,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:32:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-03 12:32:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-03 12:32:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-03 12:32:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-03 12:32:09,738 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2020-12-03 12:32:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:09,743 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-03 12:32:09,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:32:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-03 12:32:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:32:09,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:09,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:32:09,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-03 12:32:09,744 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1241849617, now seen corresponding path program 1 times [2020-12-03 12:32:09,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:09,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701594652] [2020-12-03 12:32:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:09,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701594652] [2020-12-03 12:32:09,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:09,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:32:09,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911479724] [2020-12-03 12:32:09,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:32:09,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:32:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:32:09,888 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 6 states. [2020-12-03 12:32:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:10,245 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2020-12-03 12:32:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:32:10,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-12-03 12:32:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:10,248 INFO L225 Difference]: With dead ends: 221 [2020-12-03 12:32:10,248 INFO L226 Difference]: Without dead ends: 221 [2020-12-03 12:32:10,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:32:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-03 12:32:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 63. [2020-12-03 12:32:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-03 12:32:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-12-03 12:32:10,265 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 6 [2020-12-03 12:32:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:10,265 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-12-03 12:32:10,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:32:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-12-03 12:32:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:32:10,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:10,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:10,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-03 12:32:10,266 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:10,267 INFO L82 PathProgramCache]: Analyzing trace with hash -707536244, now seen corresponding path program 1 times [2020-12-03 12:32:10,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:10,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776167013] [2020-12-03 12:32:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:10,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776167013] [2020-12-03 12:32:10,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943980529] [2020-12-03 12:32:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-03 12:32:10,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:10,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:10,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524861181] [2020-12-03 12:32:10,927 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-03 12:32:10,927 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:10,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:10,928 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:10,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:11,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:11,555 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:12,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:12,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 19 [2020-12-03 12:32:12,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482323754] [2020-12-03 12:32:12,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:32:12,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:12,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:32:12,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-03 12:32:12,094 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 8 states. [2020-12-03 12:32:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:12,699 INFO L93 Difference]: Finished difference Result 145 states and 203 transitions. [2020-12-03 12:32:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:32:12,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-03 12:32:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:12,700 INFO L225 Difference]: With dead ends: 145 [2020-12-03 12:32:12,700 INFO L226 Difference]: Without dead ends: 145 [2020-12-03 12:32:12,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-12-03 12:32:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-03 12:32:12,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 64. [2020-12-03 12:32:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-03 12:32:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-12-03 12:32:12,704 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 8 [2020-12-03 12:32:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:12,704 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-12-03 12:32:12,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:32:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-12-03 12:32:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:32:12,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:12,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:12,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-03 12:32:12,912 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash -906332610, now seen corresponding path program 1 times [2020-12-03 12:32:12,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:12,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961834879] [2020-12-03 12:32:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:12,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961834879] [2020-12-03 12:32:12,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:12,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:32:12,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167186251] [2020-12-03 12:32:12,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:32:12,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:12,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:32:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:32:12,986 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 5 states. [2020-12-03 12:32:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:13,073 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2020-12-03 12:32:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:32:13,074 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-03 12:32:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:13,075 INFO L225 Difference]: With dead ends: 78 [2020-12-03 12:32:13,075 INFO L226 Difference]: Without dead ends: 78 [2020-12-03 12:32:13,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:32:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-03 12:32:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2020-12-03 12:32:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-03 12:32:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2020-12-03 12:32:13,079 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 9 [2020-12-03 12:32:13,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:13,079 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2020-12-03 12:32:13,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:32:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2020-12-03 12:32:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:32:13,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:13,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:13,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-12-03 12:32:13,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash -906332609, now seen corresponding path program 1 times [2020-12-03 12:32:13,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:13,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059741519] [2020-12-03 12:32:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:13,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059741519] [2020-12-03 12:32:13,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:13,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:32:13,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554621430] [2020-12-03 12:32:13,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:32:13,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:13,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:32:13,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:32:13,166 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 5 states. [2020-12-03 12:32:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:13,272 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-12-03 12:32:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:32:13,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-03 12:32:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:13,275 INFO L225 Difference]: With dead ends: 100 [2020-12-03 12:32:13,275 INFO L226 Difference]: Without dead ends: 100 [2020-12-03 12:32:13,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:32:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-03 12:32:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-12-03 12:32:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-03 12:32:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2020-12-03 12:32:13,289 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 9 [2020-12-03 12:32:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:13,289 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2020-12-03 12:32:13,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:32:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2020-12-03 12:32:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:32:13,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:13,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:13,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-12-03 12:32:13,292 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:13,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1442833850, now seen corresponding path program 1 times [2020-12-03 12:32:13,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:13,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770885056] [2020-12-03 12:32:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:32:13,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770885056] [2020-12-03 12:32:13,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262109161] [2020-12-03 12:32:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-03 12:32:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:13,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:13,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236640640] [2020-12-03 12:32:13,940 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-03 12:32:13,941 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:13,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:13,941 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:13,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:14,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:14,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:15,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:15,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:15,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:15,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:16,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:16,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:16,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:16,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:32:16,299 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:16,681 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-12-03 12:32:16,977 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-03 12:32:17,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:32:17,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:17,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2020-12-03 12:32:17,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136692527] [2020-12-03 12:32:17,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-03 12:32:17,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:17,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-03 12:32:17,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2020-12-03 12:32:17,143 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand 16 states. [2020-12-03 12:32:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:18,578 INFO L93 Difference]: Finished difference Result 235 states and 273 transitions. [2020-12-03 12:32:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-03 12:32:18,579 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-12-03 12:32:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:18,580 INFO L225 Difference]: With dead ends: 235 [2020-12-03 12:32:18,580 INFO L226 Difference]: Without dead ends: 235 [2020-12-03 12:32:18,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2020-12-03 12:32:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-03 12:32:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 62. [2020-12-03 12:32:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-03 12:32:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2020-12-03 12:32:18,585 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 10 [2020-12-03 12:32:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:18,586 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2020-12-03 12:32:18,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-03 12:32:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2020-12-03 12:32:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:32:18,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:18,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:18,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-03 12:32:18,812 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-03 12:32:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1968376831, now seen corresponding path program 1 times [2020-12-03 12:32:18,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:18,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925614205] [2020-12-03 12:32:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:32:18,837 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:32:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:32:18,861 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:32:18,881 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:32:18,882 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:32:18,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-12-03 12:32:18,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:32:18 BoogieIcfgContainer [2020-12-03 12:32:18,922 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:32:18,923 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:32:18,923 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:32:18,923 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:32:18,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:06" (3/4) ... [2020-12-03 12:32:18,925 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:32:18,961 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5055150c-a392-413c-96de-9570ef38558a/bin/utaipan/witness.graphml [2020-12-03 12:32:18,961 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:32:18,962 INFO L168 Benchmark]: Toolchain (without parser) took 13669.62 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 73.5 MB in the beginning and 161.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:18,962 INFO L168 Benchmark]: CDTParser took 0.95 ms. Allocated memory is still 77.6 MB. Free memory is still 40.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:18,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 485.05 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 52.5 MB in the end (delta: 20.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:18,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.14 ms. Allocated memory is still 109.1 MB. Free memory was 52.4 MB in the beginning and 50.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:18,963 INFO L168 Benchmark]: Boogie Preprocessor took 29.94 ms. Allocated memory is still 109.1 MB. Free memory was 50.4 MB in the beginning and 48.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:18,963 INFO L168 Benchmark]: RCFGBuilder took 773.85 ms. Allocated memory is still 109.1 MB. Free memory was 48.9 MB in the beginning and 50.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:18,964 INFO L168 Benchmark]: TraceAbstraction took 12291.89 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 49.8 MB in the beginning and 164.0 MB in the end (delta: -114.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:18,964 INFO L168 Benchmark]: Witness Printer took 38.28 ms. Allocated memory is still 232.8 MB. Free memory was 164.0 MB in the beginning and 161.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:18,966 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.95 ms. Allocated memory is still 77.6 MB. Free memory is still 40.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 485.05 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 52.5 MB in the end (delta: 20.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.14 ms. Allocated memory is still 109.1 MB. Free memory was 52.4 MB in the beginning and 50.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.94 ms. Allocated memory is still 109.1 MB. Free memory was 50.4 MB in the beginning and 48.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 773.85 ms. Allocated memory is still 109.1 MB. Free memory was 48.9 MB in the beginning and 50.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12291.89 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 49.8 MB in the beginning and 164.0 MB in the end (delta: -114.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Witness Printer took 38.28 ms. Allocated memory is still 232.8 MB. Free memory was 164.0 MB in the beginning and 161.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 548]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L546] char* s1 = build_nondet_String(); [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L547] char* s2 = build_nondet_String(); [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 [L535] EXPR \read(*sc1) [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 54 locations, 27 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.1s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 383 SDtfs, 1892 SDslu, 739 SDs, 0 SdLazy, 1267 SolverSat, 135 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 586 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 7058 SizeOfPredicates, 36 NumberOfNonLiveVariables, 243 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 3/15 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: OVERALL_TIME[ms]: 629, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME[ms]: 529, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 12, TOOLS_QUANTIFIERELIM_TIME[ms]: 523, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 201, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 26, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 40, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 28, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 3, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 15, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 99, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 99, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 1, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 6, DAG_COMPRESSION_PROCESSED_NODES: 76, DAG_COMPRESSION_RETAINED_NODES: 24, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...