./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/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 276936ba1494f32a328b3de86f664a380d5263e9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:05:12,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:05:12,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:05:12,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:05:12,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:05:12,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:05:12,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:05:12,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:05:12,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:05:12,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:05:12,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:05:12,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:05:12,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:05:12,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:05:12,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:05:12,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:05:12,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:05:12,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:05:12,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:05:12,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:05:12,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:05:12,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:05:12,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:05:12,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:05:12,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:05:12,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:05:12,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:05:12,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:05:12,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:05:12,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:05:12,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:05:12,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:05:12,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:05:12,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:05:12,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:05:12,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:05:12,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:05:12,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:05:12,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:05:12,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:05:12,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:05:12,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:05:12,982 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:05:12,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:05:12,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:05:12,984 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:05:12,985 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:05:12,985 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:05:12,985 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:05:12,985 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:05:12,986 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:05:12,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:05:12,987 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:05:12,987 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:05:12,987 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:05:12,988 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:05:12,988 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:05:12,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:05:12,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:05:12,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:05:12,989 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:05:12,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:05:12,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:05:12,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:05:12,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:05:12,990 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:05:12,991 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:05:12,991 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:05:12,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:05:12,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:05:12,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:05:12,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:05:12,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:05:12,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:05:12,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:05:12,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:12,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:05:12,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:05:12,995 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:05:12,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:05:12,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:05:12,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:05:12,996 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_9c077da9-6172-4cbd-9201-ee2885b3efaa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 276936ba1494f32a328b3de86f664a380d5263e9 [2020-11-22 13:05:13,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:05:13,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:05:13,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:05:13,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:05:13,356 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:05:13,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2020-11-22 13:05:13,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/data/d0deb3f82/702ad9aa68f84106a416a05ce1d206fd/FLAG60ddaeac1 [2020-11-22 13:05:14,031 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:05:14,032 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2020-11-22 13:05:14,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/data/d0deb3f82/702ad9aa68f84106a416a05ce1d206fd/FLAG60ddaeac1 [2020-11-22 13:05:14,297 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/data/d0deb3f82/702ad9aa68f84106a416a05ce1d206fd [2020-11-22 13:05:14,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:05:14,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:05:14,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:14,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:05:14,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:05:14,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@781cd9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14, skipping insertion in model container [2020-11-22 13:05:14,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:05:14,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:05:14,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:14,668 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:05:14,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:14,778 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:05:14,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14 WrapperNode [2020-11-22 13:05:14,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:14,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:14,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:05:14,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:05:14,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:14,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:05:14,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:05:14,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:05:14,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... [2020-11-22 13:05:14,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:05:14,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:05:14,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:05:14,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:05:14,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:05:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:05:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:05:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:05:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:05:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:05:15,675 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:05:15,675 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-22 13:05:15,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:15 BoogieIcfgContainer [2020-11-22 13:05:15,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:05:15,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:05:15,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:05:15,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:05:15,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:05:14" (1/3) ... [2020-11-22 13:05:15,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc0b881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:15, skipping insertion in model container [2020-11-22 13:05:15,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:14" (2/3) ... [2020-11-22 13:05:15,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc0b881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:15, skipping insertion in model container [2020-11-22 13:05:15,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:15" (3/3) ... [2020-11-22 13:05:15,686 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2020-11-22 13:05:15,696 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:05:15,701 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-22 13:05:15,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-22 13:05:15,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:05:15,749 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:05:15,750 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:05:15,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:05:15,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:05:15,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:05:15,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:05:15,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:05:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-22 13:05:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:05:15,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:15,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:05:15,785 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:15,793 INFO L82 PathProgramCache]: Analyzing trace with hash 113944, now seen corresponding path program 1 times [2020-11-22 13:05:15,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:15,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612167344] [2020-11-22 13:05:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:15,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612167344] [2020-11-22 13:05:15,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:15,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:05:15,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142563561] [2020-11-22 13:05:15,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:15,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:15,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:15,967 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-11-22 13:05:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:16,012 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-11-22 13:05:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:16,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:05:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:16,021 INFO L225 Difference]: With dead ends: 20 [2020-11-22 13:05:16,021 INFO L226 Difference]: Without dead ends: 19 [2020-11-22 13:05:16,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-22 13:05:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-22 13:05:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 13:05:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-22 13:05:16,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 3 [2020-11-22 13:05:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:16,058 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-22 13:05:16,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-22 13:05:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:05:16,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:16,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:05:16,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:05:16,060 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:16,060 INFO L82 PathProgramCache]: Analyzing trace with hash 113945, now seen corresponding path program 1 times [2020-11-22 13:05:16,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:16,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944541894] [2020-11-22 13:05:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:16,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944541894] [2020-11-22 13:05:16,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:16,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:16,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618739615] [2020-11-22 13:05:16,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:16,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:16,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:16,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:16,152 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-11-22 13:05:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:16,259 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-22 13:05:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:16,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-22 13:05:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:16,261 INFO L225 Difference]: With dead ends: 36 [2020-11-22 13:05:16,261 INFO L226 Difference]: Without dead ends: 36 [2020-11-22 13:05:16,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:05:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-22 13:05:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2020-11-22 13:05:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 13:05:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-22 13:05:16,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 3 [2020-11-22 13:05:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:16,270 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-22 13:05:16,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-22 13:05:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:05:16,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:16,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:05:16,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:05:16,272 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:16,273 INFO L82 PathProgramCache]: Analyzing trace with hash 115938, now seen corresponding path program 1 times [2020-11-22 13:05:16,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:16,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337452319] [2020-11-22 13:05:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:16,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337452319] [2020-11-22 13:05:16,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:16,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:05:16,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570882673] [2020-11-22 13:05:16,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:16,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:16,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:16,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:16,352 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2020-11-22 13:05:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:16,377 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-11-22 13:05:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:16,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:05:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:16,379 INFO L225 Difference]: With dead ends: 20 [2020-11-22 13:05:16,379 INFO L226 Difference]: Without dead ends: 20 [2020-11-22 13:05:16,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-22 13:05:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-22 13:05:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-22 13:05:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-22 13:05:16,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 3 [2020-11-22 13:05:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:16,383 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-22 13:05:16,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-22 13:05:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:05:16,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:16,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:05:16,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:05:16,383 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:16,384 INFO L82 PathProgramCache]: Analyzing trace with hash 3595509, now seen corresponding path program 1 times [2020-11-22 13:05:16,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:16,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944084935] [2020-11-22 13:05:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:16,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944084935] [2020-11-22 13:05:16,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:16,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:16,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476290666] [2020-11-22 13:05:16,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:16,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:16,421 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-11-22 13:05:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:16,463 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-11-22 13:05:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:16,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 13:05:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:16,465 INFO L225 Difference]: With dead ends: 17 [2020-11-22 13:05:16,465 INFO L226 Difference]: Without dead ends: 17 [2020-11-22 13:05:16,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-22 13:05:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-22 13:05:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:05:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-22 13:05:16,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 4 [2020-11-22 13:05:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:16,468 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-22 13:05:16,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-22 13:05:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:05:16,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:16,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:05:16,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:05:16,469 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash 3595510, now seen corresponding path program 1 times [2020-11-22 13:05:16,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:16,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268322119] [2020-11-22 13:05:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:16,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268322119] [2020-11-22 13:05:16,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:16,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:16,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248564646] [2020-11-22 13:05:16,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:05:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:16,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:05:16,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:05:16,580 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-11-22 13:05:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:16,761 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-22 13:05:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:05:16,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-22 13:05:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:16,762 INFO L225 Difference]: With dead ends: 25 [2020-11-22 13:05:16,762 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 13:05:16,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:05:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 13:05:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2020-11-22 13:05:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:05:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-22 13:05:16,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 4 [2020-11-22 13:05:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:16,766 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-22 13:05:16,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:05:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-22 13:05:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:05:16,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:16,766 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-22 13:05:16,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:05:16,767 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash 109559352, now seen corresponding path program 1 times [2020-11-22 13:05:16,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:16,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770923933] [2020-11-22 13:05:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:16,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770923933] [2020-11-22 13:05:16,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647469529] [2020-11-22 13:05:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:16,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 13:05:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:16,978 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-22 13:05:16,978 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:05:17,005 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:05:17,006 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-22 13:05:17,006 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-22 13:05:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:17,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:17,133 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-22 13:05:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:17,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [513326161] [2020-11-22 13:05:17,196 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-22 13:05:17,197 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:17,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:05:17,207 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:05:17,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:05:17,783 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:05:18,198 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-11-22 13:05:18,306 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:05:18,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:18,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-11-22 13:05:18,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250320904] [2020-11-22 13:05:18,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 13:05:18,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:18,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 13:05:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-22 13:05:18,308 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 11 states. [2020-11-22 13:05:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:18,557 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-11-22 13:05:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:05:18,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5 [2020-11-22 13:05:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:18,559 INFO L225 Difference]: With dead ends: 34 [2020-11-22 13:05:18,559 INFO L226 Difference]: Without dead ends: 34 [2020-11-22 13:05:18,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:05:18,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-22 13:05:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 15. [2020-11-22 13:05:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:05:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-22 13:05:18,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 5 [2020-11-22 13:05:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:18,562 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-22 13:05:18,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 13:05:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-11-22 13:05:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:05:18,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:18,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:05:18,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-22 13:05:18,782 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:18,783 INFO L82 PathProgramCache]: Analyzing trace with hash -898564169, now seen corresponding path program 1 times [2020-11-22 13:05:18,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:18,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493695025] [2020-11-22 13:05:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:18,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493695025] [2020-11-22 13:05:18,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035487565] [2020-11-22 13:05:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-22 13:05:18,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:18,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:19,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269810116] [2020-11-22 13:05:19,061 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 13:05:19,061 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:19,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:05:19,062 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:05:19,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:05:19,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:05:19,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:05:19,565 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:05:19,838 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-11-22 13:05:20,224 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-11-22 13:05:20,888 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-11-22 13:05:20,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:20,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2020-11-22 13:05:20,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231000014] [2020-11-22 13:05:20,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:05:20,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:20,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:05:20,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-22 13:05:20,891 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 6 states. [2020-11-22 13:05:21,071 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-11-22 13:05:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:21,159 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2020-11-22 13:05:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:05:21,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-22 13:05:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:21,160 INFO L225 Difference]: With dead ends: 20 [2020-11-22 13:05:21,160 INFO L226 Difference]: Without dead ends: 20 [2020-11-22 13:05:21,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-22 13:05:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-22 13:05:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2020-11-22 13:05:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-22 13:05:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-22 13:05:21,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2020-11-22 13:05:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:21,163 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-22 13:05:21,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:05:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-22 13:05:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:05:21,164 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:21,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:21,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-22 13:05:21,374 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash -259165085, now seen corresponding path program 1 times [2020-11-22 13:05:21,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:21,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152844429] [2020-11-22 13:05:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:21,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152844429] [2020-11-22 13:05:21,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:21,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:21,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25035403] [2020-11-22 13:05:21,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:21,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:21,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:21,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:21,435 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-11-22 13:05:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:21,458 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-22 13:05:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:21,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-22 13:05:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:21,460 INFO L225 Difference]: With dead ends: 14 [2020-11-22 13:05:21,460 INFO L226 Difference]: Without dead ends: 14 [2020-11-22 13:05:21,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-22 13:05:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-22 13:05:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-22 13:05:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-22 13:05:21,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2020-11-22 13:05:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:21,462 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-22 13:05:21,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-22 13:05:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:05:21,462 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:21,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:21,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-22 13:05:21,463 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash 555663730, now seen corresponding path program 1 times [2020-11-22 13:05:21,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:21,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766558812] [2020-11-22 13:05:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:21,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766558812] [2020-11-22 13:05:21,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:21,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:05:21,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963031273] [2020-11-22 13:05:21,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:05:21,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:05:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:05:21,632 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2020-11-22 13:05:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:21,761 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-11-22 13:05:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:05:21,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-22 13:05:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:21,763 INFO L225 Difference]: With dead ends: 23 [2020-11-22 13:05:21,763 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 13:05:21,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:05:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 13:05:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-11-22 13:05:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 13:05:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-22 13:05:21,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2020-11-22 13:05:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:21,765 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-22 13:05:21,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:05:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-22 13:05:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:05:21,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:21,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:21,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-22 13:05:21,766 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash 555816562, now seen corresponding path program 1 times [2020-11-22 13:05:21,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:21,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318532112] [2020-11-22 13:05:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:21,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318532112] [2020-11-22 13:05:21,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:21,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:21,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832967744] [2020-11-22 13:05:21,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:21,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:21,846 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-11-22 13:05:21,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:21,865 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-11-22 13:05:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:21,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 13:05:21,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:21,867 INFO L225 Difference]: With dead ends: 17 [2020-11-22 13:05:21,867 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 13:05:21,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 13:05:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 13:05:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 13:05:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-22 13:05:21,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-11-22 13:05:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:21,869 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-22 13:05:21,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-22 13:05:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:05:21,869 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:21,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:21,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-22 13:05:21,869 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:21,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:21,870 INFO L82 PathProgramCache]: Analyzing trace with hash 672635827, now seen corresponding path program 1 times [2020-11-22 13:05:21,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:21,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357147572] [2020-11-22 13:05:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:21,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357147572] [2020-11-22 13:05:21,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417687853] [2020-11-22 13:05:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:22,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-22 13:05:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:22,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:22,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909369258] [2020-11-22 13:05:22,154 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 13:05:22,154 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:22,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:05:22,155 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:05:22,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:05:22,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:05:22,547 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:05:22,741 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-22 13:05:23,162 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-22 13:05:23,446 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-11-22 13:05:23,694 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-11-22 13:05:23,695 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:05:23,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:23,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-22 13:05:23,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560188793] [2020-11-22 13:05:23,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-22 13:05:23,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-22 13:05:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:05:23,697 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 12 states. [2020-11-22 13:05:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:23,901 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-11-22 13:05:23,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:05:23,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-11-22 13:05:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:23,902 INFO L225 Difference]: With dead ends: 19 [2020-11-22 13:05:23,902 INFO L226 Difference]: Without dead ends: 19 [2020-11-22 13:05:23,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2020-11-22 13:05:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-22 13:05:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-11-22 13:05:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:05:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-22 13:05:23,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-22 13:05:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:23,904 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-22 13:05:23,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-22 13:05:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-22 13:05:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:05:23,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:23,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:24,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-22 13:05:24,106 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-22 13:05:24,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash -656942673, now seen corresponding path program 2 times [2020-11-22 13:05:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:24,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823667515] [2020-11-22 13:05:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:24,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823667515] [2020-11-22 13:05:24,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212299692] [2020-11-22 13:05:24,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:24,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-22 13:05:24,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:05:24,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-22 13:05:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:24,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:25,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611798603] [2020-11-22 13:05:25,046 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 13:05:25,046 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:25,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:05:25,047 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:05:25,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:05:25,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:05:25,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:05:25,680 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:05:25,871 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-22 13:05:26,129 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-11-22 13:05:26,418 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-11-22 13:05:26,614 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-22 13:05:26,837 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-11-22 13:05:27,121 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-11-22 13:05:27,122 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:05:27,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:27,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2020-11-22 13:05:27,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914615307] [2020-11-22 13:05:27,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-22 13:05:27,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-22 13:05:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-11-22 13:05:27,124 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 22 states. [2020-11-22 13:05:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:27,873 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-11-22 13:05:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-22 13:05:27,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 14 [2020-11-22 13:05:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:27,874 INFO L225 Difference]: With dead ends: 24 [2020-11-22 13:05:27,874 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:05:27,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2020-11-22 13:05:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:05:27,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:05:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:05:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:05:27,875 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-11-22 13:05:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:27,875 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:05:27,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-22 13:05:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:05:27,876 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:05:28,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-22 13:05:28,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:05:28 BoogieIcfgContainer [2020-11-22 13:05:28,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:05:28,080 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:05:28,080 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:05:28,080 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:05:28,081 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:15" (3/4) ... [2020-11-22 13:05:28,083 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:05:28,107 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-22 13:05:28,107 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 13:05:28,108 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 13:05:28,108 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:05:28,140 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9c077da9-6172-4cbd-9201-ee2885b3efaa/bin/utaipan/witness.graphml [2020-11-22 13:05:28,140 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:05:28,141 INFO L168 Benchmark]: Toolchain (without parser) took 13839.87 ms. Allocated memory was 111.1 MB in the beginning and 201.3 MB in the end (delta: 90.2 MB). Free memory was 74.1 MB in the beginning and 138.5 MB in the end (delta: -64.4 MB). Peak memory consumption was 25.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:28,141 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 111.1 MB. Free memory is still 91.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:28,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.88 ms. Allocated memory is still 111.1 MB. Free memory was 73.9 MB in the beginning and 75.5 MB in the end (delta: -1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:28,141 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.78 ms. Allocated memory is still 111.1 MB. Free memory was 75.5 MB in the beginning and 73.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:28,142 INFO L168 Benchmark]: Boogie Preprocessor took 25.78 ms. Allocated memory is still 111.1 MB. Free memory was 73.5 MB in the beginning and 72.6 MB in the end (delta: 881.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:28,142 INFO L168 Benchmark]: RCFGBuilder took 827.91 ms. Allocated memory is still 111.1 MB. Free memory was 72.2 MB in the beginning and 45.8 MB in the end (delta: 26.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:28,143 INFO L168 Benchmark]: TraceAbstraction took 12401.13 ms. Allocated memory was 111.1 MB in the beginning and 201.3 MB in the end (delta: 90.2 MB). Free memory was 45.4 MB in the beginning and 141.6 MB in the end (delta: -96.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:28,143 INFO L168 Benchmark]: Witness Printer took 59.51 ms. Allocated memory is still 201.3 MB. Free memory was 141.6 MB in the beginning and 138.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:28,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 111.1 MB. Free memory is still 91.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 478.88 ms. Allocated memory is still 111.1 MB. Free memory was 73.9 MB in the beginning and 75.5 MB in the end (delta: -1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.78 ms. Allocated memory is still 111.1 MB. Free memory was 75.5 MB in the beginning and 73.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.78 ms. Allocated memory is still 111.1 MB. Free memory was 73.5 MB in the beginning and 72.6 MB in the end (delta: 881.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 827.91 ms. Allocated memory is still 111.1 MB. Free memory was 72.2 MB in the beginning and 45.8 MB in the end (delta: 26.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12401.13 ms. Allocated memory was 111.1 MB in the beginning and 201.3 MB in the end (delta: 90.2 MB). Free memory was 45.4 MB in the beginning and 141.6 MB in the end (delta: -96.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 59.51 ms. Allocated memory is still 201.3 MB. Free memory was 141.6 MB in the beginning and 138.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.3s, OverallIterations: 12, TraceHistogramMax: 2, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 317 SDslu, 141 SDs, 0 SdLazy, 485 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 58 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 125 ConstructedInterpolants, 10 QuantifiedInterpolants, 11648 SizeOfPredicates, 34 NumberOfNonLiveVariables, 267 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 11/38 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]: 504, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME[ms]: 320, 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]: 312, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 116, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 26, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 60, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 93, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 9, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 15, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 238, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 238, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, 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]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 2, DAG_COMPRESSION_PROCESSED_NODES: 51, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...